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Chen H, Chen Q, Hu X, Ding C, Huang L, Wang N. Mullite-like SmMn 2O 5-Derived Composite Oxide-Supported Ni-Based Catalysts for Hydrogen Production by Auto-Thermal Reforming of Acetic Acid. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2490. [PMID: 38893754 PMCID: PMC11173235 DOI: 10.3390/ma17112490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 05/17/2024] [Accepted: 05/18/2024] [Indexed: 06/21/2024]
Abstract
The x%Ni/Sm2O3-MnO (x = 0, 10, 15, 20) catalysts derived from SmMn2O5 mullite were prepared by solution combustion and impregnation method; auto-thermal reforming (ATR) of acetic acid (HAc) for hydrogen production was used to explore the metal-support effect induced by Ni loadings on the catalytic reforming activity and product distribution. The 15%Ni/Sm2O3-MnO catalyst exhibited optimal catalytic performance, which can be due to the appropriate Ni loading inducing a strong metal-support interaction to form a stable Ni/Sm2O3-MnO active center, while side reactions, such as methanation and ketonization, were well suppressed. According to characterizations, Sm2O3-MnO mixed oxides derived from SmMn2O5 mullite were formed with oxygen vacancies; nevertheless, loading of Ni metal further promoted the formation of oxygen vacancies, thus enhancing adsorption and activation of oxygen-containing intermediate species and resulting in higher reactivity with HAc conversion near 100% and hydrogen yield at 2.62 mol-H2/mol-HAc.
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Affiliation(s)
- Hui Chen
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Qi Chen
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Xiaomin Hu
- College of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, China
| | - Chenyu Ding
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Lihong Huang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Ning Wang
- College of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, China
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2
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Issa G, Kormunda M, Tumurbaatar O, Szegedi Á, Kovacheva D, Karashanova D, Popova M. Impact of Ce/Zr Ratio in the Nanostructured Ceria and Zirconia Composites on the Selective CO 2 Adsorption. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2428. [PMID: 37686936 PMCID: PMC10490239 DOI: 10.3390/nano13172428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 08/15/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023]
Abstract
High surface-area, mesoporous CeO2, ZrO2, and Ce-Zr composite nanoparticles were developed using the hydrothermal template-assisted synthesis method. Samples were characterized using XRD, N2 physisorption, TEM, XPS, and FT-IR spectroscopic methods. The CO2 adsorption ability of the obtained materials was tested under dynamic and equilibrium conditions. A high CO2 adsorption capacity in CO2/N2 flow or CO2/N2/H2O was determined for all studied adsorbents depending on their composition flow. A higher CO2 adsorption was registered for Ce-Zr composite nanomaterials due to the presence of strong O2- base sites and enriched surface oxygen species. The role of the Ce/Zr ratio is the process of the formation of highly active and selective adsorption sites is discussed. The calculated heat of adsorption revealed the processes of chemisorption and physisorption. Experimental data could be appropriately described by the Yoon-Nelson kinetic model. The composites reused in five adsorption/desorption cycles showed a high stability with a slight decrease in CO2 adsorption capacities in dry flow and in the presence of water vapor.
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Affiliation(s)
- Gloria Issa
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (G.I.); (O.T.)
| | - Martin Kormunda
- Faculty of Science, University of Jan Evangelista Purkyně, Pasteurova 3632/15, 400 96 Ústí nad Labem, Czech Republic;
| | - Oyundari Tumurbaatar
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (G.I.); (O.T.)
| | - Ágnes Szegedi
- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tudosok krt. 2, 1117 Budapest, Hungary;
| | - Daniela Kovacheva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;
| | - Daniela Karashanova
- Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;
| | - Margarita Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (G.I.); (O.T.)
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3
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Yao T, Long J, Duan Y, Gupta R, Xu Z. Effecting pattern study of SO 2 on Hg 0 removal over α-MnO 2 in-situ supported magnetic composite. JOURNAL OF HAZARDOUS MATERIALS 2023; 450:131088. [PMID: 36857829 DOI: 10.1016/j.jhazmat.2023.131088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/12/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
α-MnO2 was in-situ supported onto silica coated magnetite nanoparticles (MagS-Mn) to study the adsorption and oxidation of Hg0 as well as the effecting patterns of SO2 and O2 on Hg0 removal. MagS-Mn showed Hg0 removal capacity of 1122.6 μg/g at 150 °C with the presence of SO2. Hg0 adsorption and oxidation efficiencies were 2.4% and 90.6%, respectively. Hg0 removal capability deteriorated at elevated temperatures. Surface oxygen and manganese chemistry analysis indicated that SO2 inhibited the Hg0 removal through consumption of adsorbed oxygen and reduction of high valence manganese. This inhibiting effect was observed to be counteracted by O2 at lower temperatures. O2 tended to compete with SO2 for active sites and further create additional adsorbed oxygen sites for Hg0 surface reaction via surface dissociative adsorption rather than replenish the active sites consumed by SO2. The high valence manganese was also preserved by O2 which was essential to Hg0 oxidation. The intervention of O2 in the inhibition of SO2 on Hg0 removal was weakened at temperatures higher than 250 °C. Aa a result, Hg0 tends to be catalytic oxidized in the condition of low reaction temperatures and with the presence of O2 over α-MnO2 oriented composites.
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Affiliation(s)
- Ting Yao
- Shanghai SUS Environment Co., LTD., Shanghai 201703, China; Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Jisheng Long
- Shanghai SUS Environment Co., LTD., Shanghai 201703, China
| | - Yufeng Duan
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China.
| | - Rajender Gupta
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Zhenghe Xu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
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4
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Li C, Wu J, Liu D. SnO2 coupled cobalt pyrite for Hg0 removal from simulated flue gas. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2023.111861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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5
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Zhang X, Wei Y, Zhang L, Wang X, Zhang N, Bao J, He G. Self-template synthesis of CuCo2O4 nanosheet-based nanotube sorbent for efficient Hg0 removal. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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6
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Yang J, Cheng S, Qin S, Huang L, Xu Y, Wang Y. CeO 2–Co 3O 4 nanocomposite with oxidase-like activity for colorimetric detection of ascorbic acid †. RSC Adv 2023; 13:9918-9923. [PMID: 36998518 PMCID: PMC10043987 DOI: 10.1039/d3ra01074k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 03/23/2023] [Indexed: 03/30/2023] Open
Abstract
A CeO2–Co3O4 nanocomposite (NC) was prepared and characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. The obtained CeO2–Co3O4 NC displayed biomimicking oxidase-like activity, which can catalytically oxidize the 3, 3′, 5, 5′-tetramethylbenzidine (TMB) substrate from colorless to the blue oxidized TMB (ox-TMB) product with a characteristic absorption peak at 652 nm. When ascorbic acid (AA) was present, ox-TMB would be reduced, resulting in a lighter blue and lower absorbance. On the basis of these facts, a simple colorimetric method for detection of AA was established with a linear relationship ranging from 1.0 to 500 μM and a detection limit of 0.25 μM. When this method was used to detect AA in human serum and commercially available vitamin C tablet samples, a good recovery of 92.0% to 109.0% was obtained. Besides, the catalytic oxidation mechanism was investigated, and the possible catalytic mechanism of CeO2–Co3O4 NC can be described as follows. TMB is adsorbed on the CeO2–Co3O4 NC surface and provides lone-pair electrons to the CeO2–Co3O4 NC, leading to an increase in electron density of the CeO2–Co3O4 NC. An increased electron density can improve the electron transfer rate between TMB and the oxygen absorbed on its surface to generate O2˙− and ˙O2, which further oxidize TMB. A CeO2–Co3O4 nanocomposite (NC) was prepared and characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction.![]()
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Affiliation(s)
- Jin Yang
- College of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi UniversityNanning 530004China
| | - Shiqi Cheng
- College of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi UniversityNanning 530004China
| | - Shangying Qin
- College of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi UniversityNanning 530004China
| | - Li Huang
- College of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi UniversityNanning 530004China
| | - Yuanjin Xu
- College of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi UniversityNanning 530004China
| | - Yilin Wang
- College of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi UniversityNanning 530004China
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7
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Influence of Oxidative Properties of CexZr1−xO2 Catalyst on Partial Oxidation of Dimethyl Ether. Catalysts 2022. [DOI: 10.3390/catal12121536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Partial oxidation of dimethyl ether (DME) to hydrogen is an efficient route for hydrogen production for application in SOFC. However, quite a large amount of CO2 as a byproduct has been an important obstacle. In this work, cerium–zirconium solid solution (CexZr1−xO2) was applied to determine how the oxidative properties of the catalyst affect the production of CO2 in the partial oxidation of DME. The results show that the catalyst with more adsorbed oxygen (Oads) rather than the lattice oxygen has stronger oxidizability and gives higher DME conversion as well as higher CO2 yield, due to the overoxidation of CO.
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8
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Liu Y, Ma C, Zhou J, Zhu L, Cao L, Yang J. Ultra-high adsorption of Hg 0 using impregnated activated carbon by selenium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:69450-69461. [PMID: 35576034 DOI: 10.1007/s11356-022-20541-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 04/26/2022] [Indexed: 06/15/2023]
Abstract
Activated carbon was one of the main adsorptions utilized in elemental mercury (Hg0) removal from coal combustion flue gas. However, the high cost and low physical adsorption efficiency of activated carbon injection (ACI) limited its application. In this study, an ultra-high efficiency (nearly 100%) catalyst sorbent-Sex/Activated carbon (Sex/AC) was synthesized and applied to remove Hg0 in the simulated flue gas, which exhibited 120 times outstanding adsorption performance versus the conventional activated carbon. The Sex/AC reached 17.98 mg/g Hg0 adsorption capacity at 160 °C under the pure nitrogen atmosphere. Moreover, it maintained an excellent mercury adsorption tolerance, reaching the efficiency of Hg0 removal above 85% at the NO and SO2 conditions in a bench-scale fixed-bed reactor. Characterized by the multiple methods, including BET, XRD, XPS, kinetic and thermodynamic analysis, and the DFT calculation, we demonstrated that the ultrahigh mercury removal performance originated from the activated Se species in Sex/AC. Chemical adsorption plays a dominant role in Hg0 removal: Selenium anchored on the surface of AC would capture Hg0 in the flue gas to form an extremely stable substance-HgSe, avoiding subsequent Hg0 released. Additionally, the oxygen-containing functional groups in AC and the higher BET areas promote the conversion of Hg0 to HgO. This work provided a novel and highly efficient carbon-based sorbent -Sex/AC to capture the mercury in coal combustion flue gas. Graphical abstract Selenium-modified porous activated carbon and the interface functional group promotes the synergistic effect of physical adsorption and chemical adsorption to promote the adsorption capacity of Hg0.
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Affiliation(s)
- Ye Liu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, People's Republic of China
| | - Chenglong Ma
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, People's Republic of China
| | - Jiacheng Zhou
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, People's Republic of China
| | - Lin Zhu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, People's Republic of China
| | - Limei Cao
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, People's Republic of China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People's Republic of China
| | - Ji Yang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, People's Republic of China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People's Republic of China.
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9
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Liu D, Yang L, Wu J, Li B. Molten salt synthesis of WS 2 and MoS 2 nanosheets toward efficient gaseous elemental mercury capture. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 824:153934. [PMID: 35182641 DOI: 10.1016/j.scitotenv.2022.153934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/24/2022] [Accepted: 02/12/2022] [Indexed: 06/14/2023]
Abstract
The development of high-efficient adsorbents for Hg0 capture in a broad temperature window remains a big challenge. Transition-metal dichalcogenides (TMDs) present great prospects owing to their two-dimensional layered structures and abundant active sulfur species. Here, tungsten disulfide (WS2) and molybdenum disulfide (MoS2) nanosheets are easily synthesized via a molten salt route and employed for Hg0 sequestration. With the elevation of the annealing temperature, the Hg0 capture ability of WS2 nanosheet gradually enhances, while MoS2 nanosheet first increases and then decreases. They both display good mercury removal performances in an enlarged temperature range of 60-260 °C. Acidic flue gas components (i.e., SO2 and NO) subtly interfere the mercury removal process, indicating the prospective application potentials of WS2 and MoS2 nanosheets in thermal plants.
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Affiliation(s)
- Dongjing Liu
- School of Energy and Power Engineering, Jiangsu University, 212013 Zhenjiang, China
| | - Lingtao Yang
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, 200090 Shanghai, China
| | - Jiang Wu
- College of Energy and Mechanical Engineering, Shanghai University of Electric Power, 200090 Shanghai, China.
| | - Bin Li
- School of Energy and Power Engineering, Jiangsu University, 212013 Zhenjiang, China.
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10
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Chen W, Fan L, Jiang X, Guo J, Liu H, Tian M. Preparation of Ce x Zr 1-x O 2 by Different Methods and Its Catalytic Oxidation Activity for Diesel Soot. ACS OMEGA 2022; 7:16352-16360. [PMID: 35601292 PMCID: PMC9118398 DOI: 10.1021/acsomega.1c07308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 04/20/2022] [Indexed: 06/15/2023]
Abstract
Novel Ce x Zr1-x O2 (x = 0.67, 0.8, 0.9, 1.0) catalysts were designed and synthesized by solvothermal, calcination, and sol-gel methods and were used to catalyze oxidation of soot from diesel vehicle exhaust. The influence of catalysts synthesized by different methods and Ce/Zr molar ratios on the performance was investigated. These catalysts were characterized by XRD, N2 adsorption-desorption, FT-IR, TEM, XPS, H2-temperature programmed reduction (TPR), and O2-temperature programmed desorption (TPD) techniques. The results indicated that Ce0.8Zr0.2O2 prepared by the calcination method has excellent activity and stability at low temperature. The soot ignition point is 322 °C, and the ratio of soot conversion reaches 90% at 497 °C, which is lower than that from the solvothermal and sol-gel methods. The XRD, Raman, SEM, XPS and H2-TPR results reveal that the structure and oxygen adsorption properties are crucial to soot oxidation activity, and Zr4+ is successfully doped into the CeO2 lattice and forms a homogeneous solid solution. Nanostructured Ce0.8Zr0.2O2 with 110.2 m2/g surface areas is produced. The proportion of chemical oxygen and surface adsorbed oxygen in the catalyst prepared from the calcination method is the highest at 23.18%. The structure may lead to charge imbalance, unsaturated bonds, and oxygen vacancies, thus increasing the adsorption of oxygen on the catalyst surface.
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11
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Li F, Zhao B, Tan Y, Chen W, Tian M. Preparation of Al 2O 3–CeO 2 by Hydrothermal Method Supporting Copper Oxide for the Catalytic Oxidation of CO and C 3H 8. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c03906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fan Li
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou China
| | - Bing Zhao
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou China
| | - Yifeng Tan
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou China
| | - Wenlin Chen
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou China
| | - Mengkui Tian
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou China
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12
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Li Y, Yu J, Liu Y, Huang R, Wang Z, Zhao Y. A review on removal of mercury from flue gas utilizing existing air pollutant control devices (APCDs). JOURNAL OF HAZARDOUS MATERIALS 2022; 427:128132. [PMID: 35038661 DOI: 10.1016/j.jhazmat.2021.128132] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 12/10/2021] [Accepted: 12/19/2021] [Indexed: 06/14/2023]
Abstract
Mercury is a highly toxic heavy metal pollutant. It is of great significance to develop cost-effective mercury pollution control technologies of coal-fired flue gas. Among various mercury from flue gas removal methods, the application of existing air pollution control devices (APCDs) to remove mercury from flue gas is one of the most valuable methods because it doesn't need to install additional mercury removal equipment, reducing the cost of mercury removal. This review summarizes the recent progress of mercury from flue gas removal by APCDs (e.g., SCR denitration device, WFGD system and dust removal device). SCR denitration device can achieve partial removal of mercury in flue gas through combined with WFGD system, but easy inactivation and poor sulfur/water/heavy metals resistance of SCR catalyzers are still the main problems. WFGD systems can remove most of Hg2+ (80%-95%), but have low treatment ability for Hg0. Various oxidants can effectively oxidize Hg0 into Hg2+. However, traditional oxidants have high prices and secondary pollution due to the formation of by-products. Fabric filters (FFs), electrostatic precipitators (ESPs) and hybrid fabric filters (HFs) can all control the emission of mercury in the flue gas to a certain extent, especially can effectively remove most of HgP and part of Hg2+, but has low removal capacity for Hg0. Compared with ESP, FF has better capture efficiency for Hg2+ and Hg0, and a combination of ESP and FF, that is HF, can effectively improve the mercury removal capacity.
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Affiliation(s)
- Ying Li
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; Fujian Provincial Key Laboratory of Featured Biochemical and Chemical Materials, Ningde Normal University, Ningde City, Fujian Province, China
| | - Jianglong Yu
- Monash Suzhou Research Institute (MSRI) and Southeast University-Monash University Joint Graduate School, Monash University, Suzhou 215000, China
| | - Yangxian Liu
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
| | - Renkun Huang
- Fujian Provincial Key Laboratory of Featured Biochemical and Chemical Materials, Ningde Normal University, Ningde City, Fujian Province, China
| | - Zhihua Wang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Yongchun Zhao
- State Key Laboratory of Coal Combustion, Huazhong University of Science & Technology, Wuhan 430074, China.
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13
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Gaseous mercury capture using iodine-modified carbon nitride derived from guanidine hydrochloride. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2021.139171] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Yang Q, Chen N, Zhang X, Ye Z, Yang Y. A Sensitive Electrochemical Sensor Based on Co
3
O
4
‐CeO
2
Composites Modified Glassy Carbon Electrode for the Determination of Bisphenol A. ChemistrySelect 2022. [DOI: 10.1002/slct.202104513] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Qin Yang
- Department of Resources & Environment Chengdu University of Information Technology Chengdu 610225 China
| | - Ninghua Chen
- Department of Resources & Environment Chengdu University of Information Technology Chengdu 610225 China
| | - Xuefeng Zhang
- Department of Resources & Environment Chengdu University of Information Technology Chengdu 610225 China
| | - Zhixiang Ye
- Department of Resources & Environment Chengdu University of Information Technology Chengdu 610225 China
| | - Yingchun Yang
- Department of Resources & Environment Chengdu University of Information Technology Chengdu 610225 China
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15
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Pan D, Ru Y, Liu T, Wang Y, Yu F, Chen S, Yan X, Fan B, Li R. Highly efficient and stable ordered mesoporous Ti-Al composite oxide catalyst for oxidative dehydrogenation of ethylbenzene to styrene with CO2. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117388] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Yang Q, Chen N, Zhang Y, Ye Z, Yang Y. Construction of La2O3-CeO2 Composites Modified Glassy Carbon Electrode as a Novel Electrochemical Sensor for Sensitive Detection of Nitrite. CHEM LETT 2022. [DOI: 10.1246/cl.220004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Qin Yang
- Department of Resources & Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Ninghua Chen
- Department of Resources & Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Yujie Zhang
- Department of Resources & Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Zhixiang Ye
- Department of Resources & Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Yingchun Yang
- Department of Resources & Environment, Chengdu University of Information Technology, Chengdu 610225, China
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17
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ZnS-modified carbon nitride nanosheet with enhanced performance of elemental Hg removal: An experimental and density functional theory study. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-021-1050-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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18
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Zhao B, Chen W, Tan Y, Li F, Tian M. Preparation of M/Ce1–Ti O2 (M=Pt, Rh, Ru) from sol-gel method and its catalytic oxidation activity for diesel soot. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2021.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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19
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Liu Z, Liu D, Jin J, Feng L, Ni M, Zhao B, Wu X. Impact of gas impurities on the Hg 0 oxidation on high iron and calcium coal ash for chemical looping combustion. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:46130-46146. [PMID: 33410014 DOI: 10.1007/s11356-020-11872-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 11/29/2020] [Indexed: 06/12/2023]
Abstract
Coal-based mercury pollution from power plants has received increasing attention. In a previous study, high iron and calcium coal ash (HICCA) was found as a promising oxygen carrier (OC) for chemical looping combustion (CLC). The purpose of this study was to investigate the catalytic effect of HICCA on Hg0 removal as well as the impacts of several gas impurities, such as HCl, SO2, and NO. Experiments on Hg0 removal efficiencies for different atmospheres were performed in the fixed-bed reactor at 850 °C. Based upon the characterization of BET, SEM, XRD, XPS, and EDS of reaction products, the reaction mechanisms of different gases with the HICCA samples were established. The mechanisms were further explained using the thermodynamic equilibrium calculations. The experimental results showed that the Hg0 removal efficiency using HICCA was 11.60%, while the corresponding value in the presence of 50 ppm HCl was 90.46%. Hg0 removal by HICCA involving HCl is mainly attributed to homogeneous reaction between Hg0 and HCl as well as the formation of reactive species (Cl, Cl2, Cl2O, O, S, and SCl2) through the reactions of HCl with Fe2O3 and CaSO4 in HICCA. The formation of C-Cl bond is not the main pathway for the promotional effect of HCl on Hg0 removal. SO2 played a negative role in Hg0 removal by HICCA. The inhibition of SO2 may be attributed to its effect on the reduction of Fe2O3 and its bonding with C-O, COOH, and C(O)-O-C. NO enhanced Hg0 removal by HICCA primarily through the homogeneous reactions of Hg0 with N2O and O. In addition, NO also interacted with HICCA and promoted the heterogeneous oxidation of Hg0 by producing more C-O, C=O, and COOH/C(O)-O-C on HICCA surface. This study proved the effectiveness of HICCA on Hg0 removal in iG-CLC and revealed the mechanisms of the interaction between HCl/SO2/NO and MxOy/CaSO4 as well as carbon-oxygen groups.
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Affiliation(s)
- Zhuang Liu
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
- Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Dunyu Liu
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China.
- Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, China.
| | - Jing Jin
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
- Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Liang Feng
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
- Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Mingguo Ni
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
- Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Bingtao Zhao
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
- Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Xiaojiang Wu
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
- R&D Division, Shanghai Boiler Works Co. Ltd., Minhang, Shanghai, 200245, China
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20
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Gao F, Yan H, Tang X, Yi H, Zhao S, Yu Q, Ni S. Simultaneous removal of gaseous CO and elemental mercury over Cu-Co modified activated coke at low temperature. J Environ Sci (China) 2021; 101:36-48. [PMID: 33334530 DOI: 10.1016/j.jes.2020.05.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 05/25/2020] [Accepted: 05/27/2020] [Indexed: 06/12/2023]
Abstract
Cu-Co multiple-oxides modified on HNO3-pretreated activated coke (ACN) were optimized for the simultaneous removal of gaseous CO and elemental mercury (Hg0) at low temperature (< 200 °C). It was found that 2%CuOx-10%CoOx/ACN catalyst calcined at 400°C resulted in the coexistence of complex oxides including CuO, Cu2O, Co3O4, Co2O3 and CoO phases, which might be good for the simultaneous catalytic oxidation of CO by Co-species and removal of Hg0 by Cu-species, benefiting from the synergistic catalysis during the electro-interaction between Co and Cu cations (CoO ⇌ Co3O4 and Cu2O ⇌ CuO). The catalysis removal of CO oxidation was obviously depended on the reaction temperature obtaining 94.7% at 200 °C, while no obvious promoting effect on the Hg0 removal (68.3%-78.7%). These materials were very substitute for the removal of CO and Hg° from the flue gas with the conditions of 8-20 vol.% O2 and flue-gas temperature below 200 °C. The removal of Hg° followed the combination processes of adsorption and catalytic oxidation reaction via Langmuir-Hinshelwood mechanism, while the catalysis of CO abided by the Mars-van Krevelen mechanism with lattice oxygen species.
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Affiliation(s)
- Fengyu Gao
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Hao Yan
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiaolong Tang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China.
| | - Honghong Yi
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Shunzheng Zhao
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Qingjun Yu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Shuquan Ni
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
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21
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Yang JH, You JH. Synthesis and catalytic properties of a novel copper- and manganese-substituted cerium dioxide for benzene remediation. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519820945884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Catalysts based on inexpensive and abundant transition metals are necessary for effective environmental remediation. In this study, a series of CuMn-CeO2 catalysts is synthesized by a simple coprecipitation method. The properties of the as-prepared catalysts are characterized by X-ray diffraction, Brunauer–Emmett–Teller analysis, scanning electron microscopy–energy-dispersive spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The introduction of dopants results in rougher surfaces with greater surface areas and pore volumes as well as more surface defects. Furthermore, the dopant-added catalysts exhibit higher activities for benzene oxidation, as the temperature required for 90% benzene removal with Cu4Mn1-CeO2 (656 K) was 231 K lower than that required with CeO2. The superior performance of the dopant-added CeO2 catalyst is attributed to the generation of defect-rich surfaces due to the isomorphous substitution of Cu and Mn in the crystal lattice of CeO2.
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Affiliation(s)
- Jae Hwan Yang
- Department of Environmental Engineering, Chungnam National University, Daejeon, Republic of Korea
| | - Jeong Hyun You
- Department of Environmental Engineering, Chungnam National University, Daejeon, Republic of Korea
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22
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Shan Y, Liu Y, Li Y, Yang W. A review on application of cerium-based oxides in gaseous pollutant purification. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117181] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Akinnawo CA, Bingwa N, Meijboom R. Tailoring the surface properties of meso-CeO2 for selective oxidation of benzyl alcohol. CATAL COMMUN 2020. [DOI: 10.1016/j.catcom.2020.106115] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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24
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Jampaiah D, Damma D, Chalkidis A, Venkataswamy P, Bhargava SK, Reddy BM. MOF-derived ceria-zirconia supported Co3O4 catalysts with enhanced activity in CO2 methanation. Catal Today 2020. [DOI: 10.1016/j.cattod.2020.05.047] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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25
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Liu H, He Y, Li N, Liu Z, Zhang X, Zhang X, Liu Q. Organic-Inorganic Composite Nanorods as an Excellent Mimicking Peroxidases for Colorimetric Detection and Evaluation of Antioxidant. ACS APPLIED BIO MATERIALS 2020; 3:2499-2506. [PMID: 35025300 DOI: 10.1021/acsabm.0c00198] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
N,N'-Dicarboxy methyl perylene diimide-coated CeO2 nanorods (PDI/CeO2 NR) were synthesized via an ultrasonic-assisted method. PDI/CeO2 exhibits the superb mimic peroxidase functions confirmed by the catalyzed oxidation of TMB by hydrogen peroxide in less than 60 s along with color transformation from colorless to blue. The catalytic mechanism was confirmed to be an electronic transfer mechanism by fluorescence experiment. Thus, a visual colorimetric sensor was constructed for hydrogen peroxide detection with a low detection limit (LOD = 2.23 μM). Comparing the inhibition effects of l-cysteine (Cys), ascorbic acid (AA) and glutathione (GSH) on the catalytic oxidation of TMB, it can be found that they possessed different types of inhibition on the oxidation of TMB by H2O2 using PDI/CeO2, and AA has better antioxidant effect, followed by Cys and GSH. On the basis of the excellent antioxidant effect of AA, a low-cost colorimetric sensor was also used to detect AA, and a lower LOD value (0.68 μM) was obtained in the linear range of 5.0-30 μM.
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Affiliation(s)
- Hao Liu
- College of Chemical and Environmental Engineering; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
| | - YanLei He
- College of Chemical and Environmental Engineering; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
| | - Ning Li
- College of Chemical and Environmental Engineering; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
| | - Zhenxue Liu
- College of Chemical and Environmental Engineering; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
| | - Xianxi Zhang
- Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage & Novel Cell Technology; College of Chemical and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Xiao Zhang
- College of Chemistry and Molecular Engineering, Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Qingyun Liu
- College of Chemical and Environmental Engineering; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
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26
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Li H, Zhang J, Cao Y, Li F, Liu C, Song Y, Hu J, Wang Y. Enhanced activity and SO
2
resistance of Co‐modified CeO
2
‐TiO
2
catalyst prepared by facile co‐precipitation for elemental mercury removal in flue gas. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Honghu Li
- Research Center for Environment and HealthZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
- School of Information and Safety EngineeringZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
| | - Jingdong Zhang
- Research Center for Environment and HealthZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
- School of Information and Safety EngineeringZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
| | - Yanxiao Cao
- Research Center for Environment and HealthZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
- School of Information and Safety EngineeringZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
| | - Fei Li
- Research Center for Environment and HealthZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
- School of Information and Safety EngineeringZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
| | - Chaoyang Liu
- Research Center for Environment and HealthZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
- School of Information and Safety EngineeringZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
| | - Yongwei Song
- Research Center for Environment and HealthZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
- School of Information and Safety EngineeringZhongnan University of Economics and Law Wuhan Hubei 430073 PR China
| | - Jiangjun Hu
- School of Resource and Environmental SciencesWuhan University Wuhan Hubei 430079 PR China
| | - Yuan Wang
- School of Resource and Environmental SciencesWuhan University Wuhan Hubei 430079 PR China
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27
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Chalkidis A, Jampaiah D, Hartley PG, Sabri YM, Bhargava SK. Mercury in natural gas streams: A review of materials and processes for abatement and remediation. JOURNAL OF HAZARDOUS MATERIALS 2020; 382:121036. [PMID: 31473516 DOI: 10.1016/j.jhazmat.2019.121036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 08/01/2019] [Accepted: 08/17/2019] [Indexed: 06/10/2023]
Abstract
The role of natural gas in mitigating greenhouse gas emissions and advancing renewable energy resource integration is undoubtedly critical. With the progress of hydrocarbons exploration and production, the target zones become deeper and the possibility of mercury contamination increases. This impacts on the industry from health and safety risks, due to corrosion and contamination of equipment, to catalyst poisoning and toxicity through emissions to the environment. Especially mercury embrittlement, being a significant problem in LNG plants using aluminum cryogenic heat exchangers, has led to catastrophic plant incidents worldwide. The aim of this review is to critically discuss the conventional and alternative materials as well as the processes employed for mercury removal during gas processing. Moreover, comments on studies examining the geological occurrence of mercury species are included, the latest developments regarding the detection, sampling and measurement are presented and updated information with respect to mercury speciation and solubility is displayed. Clean up and passivation techniques as well as disposal methods for mercury-containing waste are also explained. Most importantly, the environmental as well as the health and safety implications are addressed, and areas that require further research are pinpointed.
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Affiliation(s)
- Anastasios Chalkidis
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC, 3001, Australia; CSIRO Energy, Private Bag 10, Clayton South, VIC, 3169, Australia
| | - Deshetti Jampaiah
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC, 3001, Australia
| | - Patrick G Hartley
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC, 3001, Australia; CSIRO Energy, Private Bag 10, Clayton South, VIC, 3169, Australia
| | - Ylias M Sabri
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC, 3001, Australia.
| | - Suresh K Bhargava
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO Box 2476, Melbourne, VIC, 3001, Australia.
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28
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Li T, Liu M, Duan Y, Li Y, Na L, Chen C, Zhengkang L. Performance and reaction mechanism for low‐temperature NO
x
catalytic synergistic Hg
0
oxidation of catalytic polyphenylene sulfide filter materials. ASIA-PAC J CHEM ENG 2020. [DOI: 10.1002/apj.2403] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tao Li
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and EnvironmentSoutheast University Nanjing 210096 China
| | - Meng Liu
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and EnvironmentSoutheast University Nanjing 210096 China
| | - Yufeng Duan
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and EnvironmentSoutheast University Nanjing 210096 China
| | - Yinsheng Li
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and EnvironmentSoutheast University Nanjing 210096 China
| | - Li Na
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and EnvironmentSoutheast University Nanjing 210096 China
| | - Cong Chen
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and EnvironmentSoutheast University Nanjing 210096 China
| | - Luo Zhengkang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and EnvironmentSoutheast University Nanjing 210096 China
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29
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Zhao H, Yin S, Lu L, Rui Z, Zheng C, Hu C, Gao X, Wu T. Catalytic oxidation of Hg 0 with O 2 induced by synergistic coupling of CeO 2 and MoO 3. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:121037. [PMID: 31563669 DOI: 10.1016/j.jhazmat.2019.121037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 08/04/2019] [Accepted: 08/17/2019] [Indexed: 06/10/2023]
Abstract
Based on Volcano plotting, the controlled combination of weak and strong bond strengths of a bimetallic catalyst has the potential to maximize the catalytic effect via the formation of intermediate bond strength between the reactant and the two different types of active sites. In this study, a rational design approach was adopted to couple MoO3 and CeO2 to maximize the catalytic oxidation of Hg0 using oxygen as the oxidizing agent. It is found that CeO2 displayed a relatively strong bond strength with Hg0 while MoO3 has relatively weak bond strength with Hg0; the pre-doping of MoO3 results in the transformation of CeO2 from clusters to the form with additional exposed CeO2 (111) surface; the CeO2 and MoO3 show synergistic effect on the formation of Brønsted acid sites. Moreover, the results show that there is an overlap between the Hg0 desorption region of MoO3 and the Hg0 adsorption region of CeO2 (with adjusted optimum bond strength with Hg0), which contributes to the catalytic reaction of Hg0 by O2. Therefore, this study reveals that the synergistic effects of the coupling of CeO2 and MoO3 induced the reaction between Hg0 and O2, which is otherwise difficult.
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Affiliation(s)
- Haitao Zhao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China; New Materials Institute, The University of Nottingham Ningbo China, Ningbo, 315100, China; Municipal Key Laboratory of Clean Energy Conversion Technologies, The University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Shufan Yin
- Chemical and Environmental Engineering, The University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Lu Lu
- Chemical and Environmental Engineering, The University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Zhenhua Rui
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Chenghang Zheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Changxing Hu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China.
| | - Tao Wu
- New Materials Institute, The University of Nottingham Ningbo China, Ningbo, 315100, China; Municipal Key Laboratory of Clean Energy Conversion Technologies, The University of Nottingham Ningbo China, Ningbo, 315100, China.
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30
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Zhao Y, Qi M, Hao R, Jiang J, Yuan B. A novel catalytic oxidation process for removing elemental mercury by using diperiodatoargentate(III) in the catalysis of trace ruthenium(III). JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120964. [PMID: 31421553 DOI: 10.1016/j.jhazmat.2019.120964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 07/20/2019] [Accepted: 08/02/2019] [Indexed: 06/10/2023]
Abstract
A series of experiments were conducted at a bench scale reactor to investigate the effects of key influencing factors on the Hg0 removal from flue gas using the prepared diperiodatoargentate (III) (DPA) as an oxidant, trace ruthenium(III) as a catalyst, respectively. The experimental results showed that the average Hg0 removal efficiency reached to 87.5% under the optimal conditions in which the DPA concentration was 1.03 mmol/L, catalyst concentration was 2.0 μmol/L, reaction temperature was 40 °C and solution pH was 8.5. Meanwhile, it was found from the experiments that the high concentrations of SO2 and NO could inhibit the Hg0 removal due to the competition between Hg0 and SO2/NO, while the lower NO concentration exhibited a slight promotion for Hg0 removal. The evolutions of DPA(III) and Ru(III) before and after the reaction were characterized by an ultraviolet visible spectrophotometer (UV-vis), from which, the promotional mechanism of Ru(III) on Hg0 removal was analyzed. The spent solution was analyzed by a cold vapor atomic fluorescence spectrometer (CVAFS), which verified that Hg0 was oxidized into Hg2+ by the catalytic system of DPA(III)-Ru(III), and DPA was converted into Ag+.
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Affiliation(s)
- Yi Zhao
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science & Engineering, North China Electric Power University, Beijing, 102206, PR China; Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, PR China.
| | - Meng Qi
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science & Engineering, North China Electric Power University, Beijing, 102206, PR China; Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, PR China
| | - Runlong Hao
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science & Engineering, North China Electric Power University, Beijing, 102206, PR China; Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, PR China
| | - Jiajun Jiang
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science & Engineering, North China Electric Power University, Beijing, 102206, PR China; Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, PR China
| | - Bo Yuan
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science & Engineering, North China Electric Power University, Beijing, 102206, PR China; Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, PR China
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31
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Wang H, Cao FX, Song YH, Yang GQ, Ge HQ, Liu ZT, Qu YQ, Liu ZW. Two-step hydrothermally synthesized Ce1-xZrxO2 for oxidative dehydrogenation of ethylbenzene with carbon dioxide. J CO2 UTIL 2019. [DOI: 10.1016/j.jcou.2019.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Highly dispersed cobalt oxide nanoparticles on manganese oxide nanotubes for aerobic oxidation of benzyl alcohol. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.105763] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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33
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Zhou Z, Cao T, Liu X, Xu S, Xu Z, Xu M. Vanadium silicate (EVS)-supported silver nanoparticles: A novel catalytic sorbent for elemental mercury removal from flue gas. JOURNAL OF HAZARDOUS MATERIALS 2019; 375:1-8. [PMID: 31030075 DOI: 10.1016/j.jhazmat.2019.04.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/09/2019] [Accepted: 04/19/2019] [Indexed: 06/09/2023]
Abstract
Vanadium silicate (EVS) is a vanadium-substituted form of titanosilicate that has a high potential for use as a sorbent for mercury removal. In the present study, EVS with supported silver nanoparticles (EVS-Ag100) as the catalytic sorbent was synthesized for elemental mercury (Hg°) capture. The physical and chemical properties of the sorbents were investigated. The raw EVS exhibited a poor Hg° capture capacity (7.7 μg g-1), because most of the vanadium species in the structure of EVS were V4+. The loading of the silver could significantly enhance the Hg° capture capacity (63.4 μg g-1). EVS-Ag100 exhibited a superior Hg° capture performance at temperatures of approximately 150 °C. Silver nanoparticles that formed on the EVS were the active sites. In addition, the vanadium species of EVS-Ag100 exhibited higher Hg° oxidation activity than those in the framework of raw EVS. The XPS results revealed the activation of the vanadium species by the silver nanoparticles. After the capture of Hg° in the presence of O2, more V5+ was observed on the surface of EVS-Ag100. Exposure of EVS-Ag100 to a continuous simulated flue gas at 150 °C with a gas hourly space velocity of 220,000 h-1 led to Hg° removal efficiency of >96% in a 1 h test.
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Affiliation(s)
- Zijian Zhou
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Tiantian Cao
- SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Xiaowei Liu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Shengming Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Zhenghe Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Minghou Xu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
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Au/Rod-like MnO2 catalyst via thermal decomposition of manganite precursor for the catalytic oxidation of toluene. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.07.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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35
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Mei J, Sun P, Xiao X, Zhang Q, Zhao H, Guo Y, Yang S. Influence mechanism of the compositions in coal-fired flue gas on Hg0 oxidation over commercial SCR catalyst. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.03.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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36
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Chalkidis A, Jampaiah D, Amin MH, Hartley PG, Sabri YM, Bhargava SK. CeO 2-Decorated ?-MnO 2 Nanotubes: A Highly Efficient and Regenerable Sorbent for Elemental Mercury Removal from Natural Gas. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8246-8256. [PMID: 31132272 DOI: 10.1021/acs.langmuir.9b00835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
CeO2 nanoparticle-decorated ?-MnO2 nanotubes (NTs) were prepared and tested for elemental mercury (Hg0) vapor removal in simulated natural gas mixtures at ambient conditions. The composition which had the largest surface area and a relative Ce/Mn atomic weight ratio of around 35% exhibited a maximum Hg0 uptake capacity exceeding 20 mg?g?1 (2 wt %), as determined from measurements of mercury breakthrough which corresponded to 99.5% Hg0 removal efficiency over 96 h of exposure. This represents a significant improvement in the activity of pure metal oxides. Most importantly, the composite nanosorbent was repeatedly regenerated at 350 ?C and retained the 0.5% Hg0 breakthrough threshold. It was projected to be able to sustain 20 regeneration cycles, with the presence of acid gases, CO2, and H2S, not affecting its performance. This result is particularly important, considering that pure CeO2 manifests rather poor activity for Hg0 removal at ambient conditions, and hence, a synergistic effect in the composite nanomaterial was observed. This possibly results from the addition of facile oxygen vacancy formation at ?-MnO2 NTs and the increased amount of surface-adsorbed oxygen species.
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Affiliation(s)
- Anastasios Chalkidis
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
- CSIRO Energy , Private Bag 10, Clayton South , Victoria 3169 , Australia
| | - Deshetti Jampaiah
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
| | - Mohamad Hassan Amin
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
| | - Patrick G Hartley
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
- CSIRO Energy , Private Bag 10, Clayton South , Victoria 3169 , Australia
| | - Ylias M Sabri
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
| | - Suresh K Bhargava
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
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37
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Zhao Y, Nie G, Ma X, Xu P, Zhao X. Peroxymonosulfate catalyzed by rGO assisted CoFe 2O 4 catalyst for removing Hg 0 from flue gas in heterogeneous system. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 249:868-877. [PMID: 30954835 DOI: 10.1016/j.envpol.2019.03.103] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/18/2019] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
The cobalt ferrite-reduced oxidized graphene (CoFe2O4/rGO) catalyst was synthesized by hydrothermal method and characterized by Powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning electron microscope (SEM), Brunauere Emmette Teller (BET) and Hysteresis loop. For developing a new method of removing elemental mercury (Hg0) from flue gas, the effects of catalyst dosage, PMS concentration, solution pH and reaction temperature on the removal efficiency were investigated experimentally by using peroxymonosulfate (PMS) catalyzed by CoFe2O4/rGO at a self-made bubbling reactor. The average removal efficiency of Hg0 in a 30-min period reached 95.56%, when CoFe2O4/rGO dosage was 0.288 g/L, PMS concentration was 3.5 mmol/L, solution pH was 5.5 and reaction temperature was 55 °C. Meanwhile, based on the free radical quenching experiments, in which, ethyl alcohol and tert butyl alcohol were used as quenchers to prove indirectly the presence of •OH and SO4•-, the characterizations of catalysts and reaction products, and the existing results from other scholars. The reaction mechanism was proposed.
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Affiliation(s)
- Yi Zhao
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China.
| | - Guoxin Nie
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China
| | - Xiaoying Ma
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China
| | - Peiyao Xu
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China
| | - Xiaochu Zhao
- Haidian Branch, Beijing Electric Power Supply Company, Beijing 100000, PR China
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Abstract
The Co3O4/g-C3N4 hybrids are constructed via the incipient wetness impregnation method by depositing Co3O4 onto the exterior of g-C3N4, and then employed for Hg0 capture within 60–240 °C. The results show that the Co3O4/g-C3N4 hybrid with a Co3O4 content of 12 wt% performs optimally with the highest Hg0 removal efficiency of ~100% at or above 120 °C. The high performances of the Co3O4/g-C3N4 hybrids are probably attributed to the tight interfacial contact between Co3O4 and g-C3N4, with its improved electron transfer, inferring that cobalt oxide and g-C3N4 display a cooperative effect towards Hg0 removal. NO and SO2 shows a significant suppressive influence on the mercury capture performance, plausibly owing to the competing adsorption and side reactions.
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High Catalytic Performance of Mn-Doped Ce-Zr Catalysts for Chlorobenzene Elimination. NANOMATERIALS 2019; 9:nano9050675. [PMID: 31052385 PMCID: PMC6567123 DOI: 10.3390/nano9050675] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/02/2019] [Accepted: 04/16/2019] [Indexed: 11/16/2022]
Abstract
Mn-Ce-Zr-O catalysts doped with varying Mn content were prepared and assessed for the catalytic combustion of chlorobenzene (CB). Nanosized MCZ-0.67 catalyst with amorphous phase exhibited a high and stable catalytic activity among the studied catalysts, achieving 90% CB conversion at 226 °C and withstanding stability tests, including time-based stability and the successive influence of various operating conditions. Meanwhile, the MCZ-0.67 catalyst used showed good recyclability by calcination in air. Characterization results suggested that Mn doping played a dominant role in improving the catalytic performance, resulting in larger surface area, better redox properties and greater amounts of surface active oxygen. In addition, the introduction of Zr was also indispensable for maintaining the good catalytic performance of catalysts. Finally, trace amounts of polychlorinated by-products during CB oxidation were monitored and the oxidation process was discussed.
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40
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Yue H, Lu P, Su W, Xing Y, Li R, Wang J. Simultaneous removal of NO x and Hg 0 from simulated flue gas over Cu aCe bZr cO 3/r-Al 2O 3 catalysts at low temperatures: performance, characterization, and mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:13602-13618. [PMID: 30919195 DOI: 10.1007/s11356-019-04822-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
To optimize the simultaneous removal of NOx and Hg0, a series of CuaCebZrcO3/γ-Al2O3 catalysts prepared by the impregnation method were explored and their physical and chemical properties were analyzed by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, X-ray photoelectron spectroscopy (XPS), NH3-temperature-programmed desorption (NH3-TPD), H2-temperature-programmed reduction (H2-TPR), in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFT), and Fourier transform infrared spectroscopy (FT-IR). The results showed that 15% Cu1.4Ce0.55Zr0.25O3/γ-Al2O3 resulted in the highest conversion efficiency for the simultaneous removal of NOx (93%) and Hg0 (85%) at low temperatures (200 to 300 °C). Meanwhile, 15% Cu1.4Ce0.55Zr0.25O3/γ-Al2O3 showed good stability and resistance to SO2 and H2O, which is due to its low crystallinity, good textural performance, and strong redox ability. According to the TPD, TPR, and XPS results, the strong acidic character of 15% Cu1.4Ce0.55Zr0.25O3/γ-Al2O3 promoted the removal of NOx and Hg0. The synergistic effect between CuO and CeO2 in 15% Cu1.4Ce0.55Zr0.25O3/γ-Al2O3 can increase the mobility of chemically adsorbed oxygen and activates lattice oxygen, leading to an excellent performance. The DRIFT results showed that NH3, NH4+, nitrate, and nitrite participated in the selective catalytic reduction (SCR) reaction. On the basis of our experimental results, Hg0 and NOx removal mechanisms were proposed as Hg (ad) + O* → HgO (ad) and 2NH3/NH4+ (ad) + NO2/NO3- (ad) + NO→2N2 + 3H2O/2H+, respectively.
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Affiliation(s)
- Huifang Yue
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Pei Lu
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Wei Su
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Yi Xing
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Rui Li
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jiaqing Wang
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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41
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Zhao H, Mu X, Zheng C, Liu S, Zhu Y, Gao X, Wu T. Structural defects in 2D MoS 2 nanosheets and their roles in the adsorption of airborne elemental mercury. JOURNAL OF HAZARDOUS MATERIALS 2019; 366:240-249. [PMID: 30530015 DOI: 10.1016/j.jhazmat.2018.11.107] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 11/28/2018] [Accepted: 11/29/2018] [Indexed: 05/15/2023]
Abstract
In this research, ab initio calculations and experimental approach were adopted to reveal the mechanism of Hg0 adsorption on MoS2 nanosheets that contain various types of defects. The ab initio calculation showed that, among different structural defects, S vacancies (Vs) in the MoS2 nanosheets exhibited outstanding potential to strongly adsorb Hg0. The MoS2 material was then prepared in a controlled manner under conditions, such as temperature, concentration of precursors, etc., that were determined by adopting the new method developed in this study. Characterisation confirmed that the MoS2 material is of graphene-like layered structure with abundant structural defects. The integrated dynamic and steady state (IDSS) testing demonstrated that the Vs-rich nanosheets showed excellent Hg0 adsorption capability. In addition, ab initial calculation on charge density difference, PDOS, and adsorption pathways revealed that the adsorption of Hg0 on the Vs-rich MoS2 surface is non-activated chemisorption.
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Affiliation(s)
- Haitao Zhao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; Key Laboratory of Clean Energy Conversion Technologies, The University of Nottingham Ningbo China, Ningbo 315100, China
| | - Xueliang Mu
- Key Laboratory of Clean Energy Conversion Technologies, The University of Nottingham Ningbo China, Ningbo 315100, China
| | - Chenghang Zheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Shaojun Liu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Yanqiu Zhu
- University of Exeter, Exeter EX4 4QF, UK
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Tao Wu
- Key Laboratory of Clean Energy Conversion Technologies, The University of Nottingham Ningbo China, Ningbo 315100, China.
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44
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Jampaiah D, Chalkidis A, Sabri YM, Bhargava SK. Role of Ceria in the Design of Composite Materials for Elemental Mercury Removal. CHEM REC 2018; 19:1407-1419. [DOI: 10.1002/tcr.201800161] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 11/19/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Deshetti Jampaiah
- Centre for Advanced Materials and Industrial Chemistry (CAMIC)School of Science, RMIT University GPO BOX 2476 Melbourne VIC 3001 Australia
| | - Anastasios Chalkidis
- Centre for Advanced Materials and Industrial Chemistry (CAMIC)School of Science, RMIT University GPO BOX 2476 Melbourne VIC 3001 Australia
| | - Ylias M. Sabri
- Centre for Advanced Materials and Industrial Chemistry (CAMIC)School of Science, RMIT University GPO BOX 2476 Melbourne VIC 3001 Australia
| | - Suresh K. Bhargava
- Centre for Advanced Materials and Industrial Chemistry (CAMIC)School of Science, RMIT University GPO BOX 2476 Melbourne VIC 3001 Australia
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45
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Elemental Mercury Adsorption by Cupric Chloride-Modified Mesoporous Carbon Aerogel. COLLOIDS AND INTERFACES 2018. [DOI: 10.3390/colloids2040066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Mesoporous carbon aerogels (MCA) synthesized via aqueous polymerization of resorcinol and formaldehyde were modified by copper chloride and applied for adsorption removal of elemental mercury (Hg0) at a low temperature. The sorbents were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), nitrogen adsorption/desorption isotherms, and X-ray photoelectron spectroscopy (XPS) techniques. The results show that CuCl2-modified MCA exhibited good ability for Hg0 adsorption in the 40–160 °C temperature range, with Hg0 removal efficiency all above 95.0%. The Hg0 removal efficiency first increased and then decreased with the elevation of reaction temperature. It performed optimally at 80 °C with the highest Hg0 removal efficiency of 98.7%. XPS results indicate that covalent chlorines (C-Cl groups) play an important role in elemental mercury adsorption process. Hg0 is firstly captured in the form of oxidized mercury (Hg2+) and then reacts with C-Cl groups to form HgCl2.
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46
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Zhang D, Hou L, Chen G, Zhang A, Wang F, Wang R, Li C. Cr Doping MnOx Adsorbent Significantly Improving Hg0 Removal and SO2 Resistance from Coal-Fired Flue Gas and the Mechanism Investigation. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b04857] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dan Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
- School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Li’an Hou
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
- Rocket Force University
of Engineering, Xi’an 710025, China
| | - Guanyi Chen
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Anchao Zhang
- School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Fahui Wang
- School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Ruirui Wang
- School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Chengwei Li
- School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China
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47
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Density Functional Theory Study on Mechanism of Mercury Removal by CeO2 Modified Activated Carbon. ENERGIES 2018. [DOI: 10.3390/en11112872] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Doping of CeO2 on activated carbon (AC) can promote its performance for mercury abatement in flue gas, while the Hg0 removal mechanism on the AC surface has been rarely reported. In this research, density functional theory (DFT) calculations were implemented to unveil the mechanism of mercury removal on plain AC and CeO2 modified AC (CeO2-AC) sorbents. Calculation results indicate that Hg0, HCl, HgCl and HgCl2 are all chemisorbed on the adsorbent. Strong interaction and charge transfer are shown by partial density of states (PDOS) analysis of the Hg0 adsorption configuration. HCl, HgCl and HgCl2 can be dissociatively adsorbed on the AC model and subsequently generate HgCl or HgCl2 released to the gas phase. The adsorption energies of HgCl and HgCl2 on the CeO2-AC model are relatively high, indicating a great capacity for removing HgCl and HgCl2 in flue gas. DFT calculations suggest that AC sorbents exhibit a certain catalytic effect on mercury oxidation, the doping of CeO2 enhances the catalytic ability of Hg0 oxidation on the AC surface and the reactions follow the Langmuir–Hinshelwood mechanism.
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48
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Catalytic Oxidation of Benzyl Alcohol Using Nanosized Cu/Ni Schiff-Base Complexes and Their Metal Oxide Nanoparticles. Catalysts 2018. [DOI: 10.3390/catal8100452] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this work, nanosized Cu and Ni Schiff-base complexes, namely ahpvCu, ahpnbCu, and ahpvNi, incorporating imine ligands derived from the condensation of 2-amino-3-hydroxypyridine, with either 3-methoxysalicylaldehyde (ahpv) or 4-nitrobenzaldehyde (ahpnb), were synthesized using sonochemical approach. The structure and properties of the new ligands and their complexes with Ni(II) and Cu(II) were determined via infrared (IR), nuclear magnetic resonance (NMR), electronic spectra (UV-Vis), elemental analysis (CHN), thermal gravimetric analysis (TGA), molar conductivity (Λm), and magnetic moment (μeff). The combined results revealed the formation of 1:1 (metal: ligand) complexes for ahpvCu and ahpvNi and 1:2 for ahpnbCu. Additionally, CuO and NiO nanoparticles were prepared by calcination of the respective nanosized Cu/Ni complexes at 500 °C, and characterized by powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). Significantly, the as-prepared nanosized Schiff-base Cu/Ni complexes and their oxides showed remarkable catalytic activity towards the selective oxidation of benzyl alcohol (BzOH) in aqueous H2O2/ dimethylsulfoxide (DMSO) solution. Thus, catalytic oxidation of BzOH to benzaldehyde (BzH) using both ahpvCu complex and CuO nanoparticles in H2O2/DMSO media at 70 °C for 2 h yielded 94% and 98% BzH, respectively, with 100% selectivity.
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Zhang L, Yang C, Zhang L, He H, Luo M, Jia Y, Li Y. Application of Plasma Treatment in Preparation of Soybean Oil Factory Sludge Catalyst and Its Application in Selective Catalytic Oxidation (SCO) Denitration. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1609. [PMID: 30181491 PMCID: PMC6163642 DOI: 10.3390/ma11091609] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/24/2018] [Accepted: 08/30/2018] [Indexed: 11/29/2022]
Abstract
At present, the most commonly used denitration process is the selective catalytic reduction (SCR) method. However, in the SCR method, the service life of the catalyst is short, and the industrial operation cost is high. The selective catalytic oxidation absorption (SCO) method can be used in a low temperature environment, which greatly reduces energy consumption and cost. The C/N ratio of the sludge produced in the wastewater treatment process of the soybean oil plant used in this paper is 9.64, while the C/N ratio of the sludge produced by an urban sewage treatment plant is 10⁻20. This study shows that the smaller the C/N ratio, the better the denitration efficiency of the catalyst. Therefore, dried oil sludge is used as a catalyst carrier. The influence of different activation times, and LiOH concentrations, on catalyst activity were investigated in this paper. The denitration performance of catalysts prepared by different activation sequences was compared. The catalyst was characterized by Fourier Transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM). The experimental results showed that: (1) When the concentration of the LiOH solution used for activation is 15%, and the activation time is four hours, the denitration effect of the catalyst is the best; (2) the catalyst prepared by activation before plasma roasting has the best catalytic activity.
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Affiliation(s)
- Lei Zhang
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Chao Yang
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Lei Zhang
- China National Heavy Machinery Research Institute Co., Ltd., Xi'an 710032, China.
| | - Huibin He
- Zhejiang Dechuang Environmental Protection Technology Co., Ltd., Xi'an 710000, China.
| | - Min Luo
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Yang Jia
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Yonghui Li
- China National Heavy Machinery Research Institute Co., Ltd., Xi'an 710032, China.
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50
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Lu P, Yue H, Xing Y, Wei J, Zeng Z, Li R, Wu W. Low-temperature co-purification of NO x and Hg 0 from simulated flue gas by Ce xZr yMn zO 2/r-Al 2O 3: the performance and its mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:20575-20590. [PMID: 29748813 DOI: 10.1007/s11356-018-2199-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 04/30/2018] [Indexed: 06/08/2023]
Abstract
In this study, series of CexZryMnzO2/r-Al2O3 catalysts were prepared by impregnation method and explored to co-purification of NOx and Hg0 at low temperature. The physical and chemical properties of the catalysts were investigated by XRD, BET, FTIR, NH3-TPD, H2-TPR, and XPS. The experimental results showed that 10% Ce0.2Zr0.3Mn0.5O2/r-Al2O3 yielded higher conversion on co-purification of NOx and Hg0 than the other prepared catalysts at low temperature, especially at 200-300 °C. 91% and 97% convert rate of NOx and Hg0 were obtained, respectively, when 10% Ce0.2Zr0.3Mn0.5O2/r-Al2O3 catalyst was used at 250 °C. Moreover, the presence of H2O slightly decreased the removal of NOx and Hg0 owing to the competitive adsorption of H2O and Hg0. When SO2 was added, the removal of Hg0 first increased slightly and then presented a decrease due to the generation of SO3 and (NH4)2SO4. The results of NH3-TPD indicated that the strong acid of 10% Ce0.2Zr0.3Mn0.5O2/r-Al2O3 improved its high-temperature activity. XPS and H2-TPR results showed there were high-valence Mn and Ce species in 10% Ce0.2Zr0.3Mn0.5O2/r-Al2O3, which could effectively promote the removal of NOx and Hg0. Therefore, the mechanisms of Hg0 and NOx removal were proposed as Hg (ad) + [O] → HgO (ad), and 2NH3/NH4+ (ad) + NO2 (ad) + NO (g) → 2 N2 + 3H2O/2H+, respectively. Graphical abstract ᅟ.
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Affiliation(s)
- Pei Lu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
| | - Huifang Yue
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yi Xing
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Jianjun Wei
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina, 27401, USA.
| | - Zheng Zeng
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina, 27401, USA
| | - Rui Li
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
| | - Wanrong Wu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
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