1
|
Deng L, Sun T, Zhang S, Li Y, Zhong Q, Pang H, Li X, Zhao Y, Xie G. Effect of vanadium and tungsten loading order on the denitration performance of F-doped V 2O 5-WO 3/TiO 2 catalysts. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32200-32211. [PMID: 38644427 DOI: 10.1007/s11356-024-33411-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 04/15/2024] [Indexed: 04/23/2024]
Abstract
F-doped V2O5-WO3/TiO2 catalyst has been confirmed to have excellent denitration activity at low temperatures. Since the V2O5-WO3/TiO2 catalyst is a structure-sensitive catalyst, the loading order of V2O5 and WO3 may affect its denitration performance. In this paper, a series of F-doped V2O5-WO3/TiO2 catalysts with different V2O5 and WO3 loading orders were synthesized to investigate the effect of denitration performance at low temperatures. It was found that the loading orders led to significant gaps in denitration performance in the range of 120-240 °C. The results indicated loading WO3 first better utilized the oxygen vacancies on the TiF carrier promoting the generation of reduced vanadium species. In addition, loading WO3 first facilitated the dispersion of V2O5 thus enhanced the NH3 adsorption capacity of VWTiF. In situ DRIFT verified the rapid reaction between NO2, nitrate, and nitrite species and adsorbed NH3 over the VWTiF, confirming that the NH3 selective catalytic reduction (NH3-SCR) reaction over VWTiF at 240 °C proceeded by the Langmuir-Hinshelwood (L-H) mechanism. This research established the constitutive relationship between the loading order of V2O5 and WO3 and the denitration performance of the F-doped VWTi catalyst providing insights into the catalyst design process.
Collapse
Affiliation(s)
- Lifeng Deng
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Tangxu Sun
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450066, People's Republic of China
| | - Shule Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China.
| | - Yu Li
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450066, People's Republic of China
| | - Qin Zhong
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Huiwen Pang
- China Construction Ecoenvironm Protect Technol Co, Suzhou, 215100, PR China
| | - Xiang Li
- China Construction Ecoenvironm Protect Technol Co, Suzhou, 215100, PR China
| | - Yunyan Zhao
- Shandong Aluminum Industry Corporation Limited, Zibo, 255052, People's Republic of China
| | - Guangbo Xie
- Shandong Aluminum Industry Corporation Limited, Zibo, 255052, People's Republic of China
| |
Collapse
|
2
|
Chang C, Yan Z, Zhang C, Zhang Y, Jiang M, Ruan L, Xiao M, Yu Y, He H. Design of Ca-type todorokite catalysts with highly active for the selective reduction of NO x by NH 3 at low temperatures. J Environ Sci (China) 2024; 138:697-708. [PMID: 38135432 DOI: 10.1016/j.jes.2023.04.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/17/2023] [Accepted: 04/23/2023] [Indexed: 12/24/2023]
Abstract
Ca-type todorokite catalysts were designed and prepared by a simple redox method and applied to the selective reduction of NOx by NH3 (NH3-SCR) for the first time. Compared with the Na-type manjiroite prepared by the same method, the todorokite catalysts with different Mn/Ca ratios showed greatly improved catalytic activity for NOx reduction. Among them, Mn8Ca4 catalyst exhibited the best NH3-SCR performance, achieving 90% NOx conversion within temperature range of 70-275°C and having a high sulphur resistance. Compared to the Na-type manjiroite sample, Ca-type todorokite catalysts possessed an increased size of tunnel, resulting in a larger specific surface area. As increased the amounts of Ca doping, the Na content in Ca-type todorokite catalysts significantly decreased, providing larger amounts of Brønsted acid sites for NH3 adsorption to produce NH4+. The NH4+ species were highly active for reaction with NO + O2, playing a determining role in NH3-SCR process at low temperatures. Meanwhile, larger amounts of surface adsorbed oxygen contained over the Ca-doping samples than that over Na-type manjiroite, promoting the oxidation of NO and fast SCR processes. Over the Ca-type todorokite catalysts, furthermore, nitrates produced during the flow of NO + O2, were more active for reaction with NH3 than that over Na-type manjiroite, benefiting the occurrence of NH3-SCR process. This study provides novel insights into the design of NH3-SCR catalysts with high performance.
Collapse
Affiliation(s)
- Chuang Chang
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Zidi Yan
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Chunlei Zhang
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Yanshuang Zhang
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Miao Jiang
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Luna Ruan
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Min Xiao
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
| | - Yunbo Yu
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Hong He
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| |
Collapse
|
3
|
Tian X, Wang H, Xu S, Gao L, Cao J, Chen J, Zhang Q, Ning P, Hao J. Boosting the catalytic performance of Cu-SAPO-34 in NO x removal via hydrothermal treatment. J Environ Sci (China) 2024; 135:640-655. [PMID: 37778835 DOI: 10.1016/j.jes.2022.10.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/26/2022] [Accepted: 10/28/2022] [Indexed: 10/03/2023]
Abstract
Phosphate ions promoted Cu-SAPO-34 (P-Cu-SAPO-34) were prepared using bulk CuO particles as Cu2+ precursor by a solid-state ion exchange technique for the selective catalytic reduction of NOx with NH3 (NH3-SCR). The effects of high temperature (H-T) hydrothermal aging on the NOx removal (de-NOx) performance of Cu-SAPO-34 with and without phosphate ions were systematically investigated at atomic level. The results displayed that both Cu-SAPO-34 and P-Cu-SAPO-34 presented relatively poor NOx removal activity with a low conversion (< 30%) at 250-500°C. However, after H-T hydrothermal treatment (800°C for 10 hr at 10% H2O), these two samples showed significantly satisfied NOx elimination performance with a quite high conversion (70%-90%) at 250-500°C. Additionally, phosphate ions decoration can further enhance the catalytic performance of Cu-SAPO-34 after hydrothermal treatment (Cu-SAPO-34H). The textural properties, morphologies, structural feature, acidity, redox characteristic, and surface-active species of the fresh and hydrothermally aged samples were analyzed using various characterization methods. The systematical characterization results revealed that increases of 28% of the isolated Cu2+ active species (Cu2+-2Z, Cu (OH)+-Z) mainly from bulk CuO and 50% of the Brønsted acid sites, the high dispersion of isolated Cu2+ active component as well as the Brønsted acid sites were mainly responsible for the accepted catalytic activity of these two hydrothermally aged samples, especially for P-Cu-SAPO-34H.
Collapse
Affiliation(s)
- Xiaoyan Tian
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Huimin Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Siyuan Xu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Lianyun Gao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Jinyan Cao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Jianjun Chen
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, China
| | - Qiulin Zhang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, China.
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, China
| | - Jiming Hao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; School of Environment, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| |
Collapse
|
4
|
Tang J, Wang X, Xing L, Liang Y, Li H, Liu M. Effect of Cu loading on the performance and kinetics of Cu/SAPO-34 catalysts for selective catalytic reduction with NH 3. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:64682-64699. [PMID: 37072592 DOI: 10.1007/s11356-023-26957-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/07/2023] [Indexed: 05/03/2023]
Abstract
A series of X%Cu/SAPO-34 (X = 1.0, 2.0, 4.0 and 6.0) catalysts were prepared by ultrasonic impregnation method for selective catalytic reduction (SCR) of NOx with ammonia. The effect of different Cu loadings on the selective catalytic reduction of NO by molecular sieve catalysts was examined on a fixed-bed reactor. Catalyst physicochemical properties were characterized and analyzed using XRD, TEM, NH3-TPD, H2-TPR, and in situ DRIFTS. Catalysts were used in reaction kinetics studies from the perspective of transient and steady-state kinetics. Cu/SAPO-34 catalyst with 4% Cu loading had the best denitrification efficiency and wide activity window. Copper species were highly dispersed on the catalyst surface. Cu/SAPO-34 catalyst with 4% Cu loading had rich acidic sites and excellent redox performance. Cu/SAPO-34 catalysts with 4% Cu loading possess minimal activation energy and were lower than commercial catalysts. According to the results of in situ IR, transient and steady-state analysis, the Cu/SAPO-34 catalyst with 4% Cu loading in the NH3-SCR reaction process was mainly E-R mechanism, and there was L-H mechanism.
Collapse
Affiliation(s)
- Jungang Tang
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China
- Longmen Laboratory, Luoyang, 471000, China
| | - Xuetao Wang
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China.
- Longmen Laboratory, Luoyang, 471000, China.
| | - Lili Xing
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China
- Longmen Laboratory, Luoyang, 471000, China
| | - Yanzheng Liang
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China
- Longmen Laboratory, Luoyang, 471000, China
| | - Haojie Li
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China
- Longmen Laboratory, Luoyang, 471000, China
| | - Mengjie Liu
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China
- Longmen Laboratory, Luoyang, 471000, China
| |
Collapse
|
5
|
Zhang C, Liu X, Jiang M, Wen Y, Zhang J, Qian G. A review on identification, quantification, and transformation of active species in SCR by EPR spectroscopy. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:28550-28562. [PMID: 36708481 DOI: 10.1007/s11356-023-25467-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
Electron paramagnetic resonance (EPR) is the only technique that provides direct detection of free radicals and samples that contain unpaired electrons. Thus, EPR had an important potential application in the field of selective catalytic reduction of nitrogen oxide (SCR). For the first time, this work reviewed recent developments of EPR in charactering SCR. First, qualitative analysis focused on recognizing Cu, Fe, V, Ti, Mn, and free-radical (oxygen vacancy and superoxide radical) species. Second, quantification of the active species was obtained by a double-integral and calibration method. Third, the active species evolved because of different thermal treatments and redox-thermal processes under reductants (NH3 and NO). The coordination information of the active species in catalysts and their effects on SCR performances were concluded from mechanism viewpoints. Finally, potential perspectives were put forward for EPR developments in characterizing the SCR processes in the future. After all, EPR characterization will help to have a deep understanding of structure-activity relationship in one catalyst.
Collapse
Affiliation(s)
- Chenchen Zhang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road., Shanghai, 200444, People's Republic of China
| | - Xinyu Liu
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road., Shanghai, 200444, People's Republic of China
| | - Meijia Jiang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road., Shanghai, 200444, People's Republic of China
| | - Yuling Wen
- Shanghai SUS Environment Co., LTD, Shanghai, 201703, China
| | - Jia Zhang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road., Shanghai, 200444, People's Republic of China.
| | - Guangren Qian
- MGI of Shanghai University, Xiapu Town, Xiangdong District, Pingxiang City, Jiangxi, 337022, People's Republic of China
| |
Collapse
|
6
|
Hu Y, Ding S, Tan C, Wu P, Li G, Wang S, Yang H, Zhang Y. Three-dimensionally ordered macroporous (3DOM) structure promoted the activity and H2O poisoning resistance of CeMn/3DOM-TiO2 catalyst in NH3-SCR. J RARE EARTH 2023. [DOI: 10.1016/j.jre.2023.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
|
7
|
Shoneye A, Jiao H, Tang J. Bimetallic FeO x -MO x Loaded TiO 2 (M = Cu, Co) Nanocomposite Photocatalysts for Complete Mineralization of Herbicides. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:1388-1396. [PMID: 36721769 PMCID: PMC9884081 DOI: 10.1021/acs.jpcc.2c06796] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 12/01/2022] [Indexed: 05/25/2023]
Abstract
A series of monometallic and bimetallic cocatalyst(s), comprising FeO x , CuO x , CoO x , FeO x -CuO x , and FeO x -CoO x loaded TiO2 catalysts prepared by the surface impregnation method, were investigated for the photocatalytic mineralization of the widely used four herbicides: 2,4-dichlorophenol (2,4-DCP), 2,4,6-trichlorophenol (2,4,6-TCP), 2,4-dichlorophenoxyacetic acid (2,4-D), and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T). It was found that FeO x -CoO x /TiO2 showed the highest photocatalytic efficiency toward mineralization of selected herbicides. FeO x -CoO x /TiO2 achieves 92% TOC removal in 180 min, representing nearly three time activity of the benchmark PC50 TiO2. From XPS analysis, FeOOH, CuO, and CoO were determined to be loaded onto the TiO2 surface. The outstanding photocatalytic performance of the optimized FeO x -CoO x /TiO2 sample for herbicides mineralization is due to an increased charge separation and enhanced hydroxyl radicals production monitored by diverse spectroscopies. Based on the proposed charge transfer mechanism, FeO x -CoO x cocatalyst species accelerate the transfer of photogenerated holes on TiO2, thus facilitating hydroxyl radicals production.
Collapse
Affiliation(s)
- Ayoola Shoneye
- Department
of Chemical Engineering University College
London Torrington Place, London, WC1E 7JE, U.K.
| | - Haimiao Jiao
- Department
of Chemical Engineering University College
London Torrington Place, London, WC1E 7JE, U.K.
| | - Junwang Tang
- Department
of Chemical Engineering University College
London Torrington Place, London, WC1E 7JE, U.K.
| |
Collapse
|
8
|
Wei N, Zhao C, Hu X, Tong Z, Yun J, Jiang X, Liu C, Wang K, Zou Y, Chen Z. Elucidating the facet-dependent reactivity of CrMn catalyst for selective catalytic reduction of NO x with NH 3. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 855:158881. [PMID: 36411606 DOI: 10.1016/j.scitotenv.2022.158881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/15/2022] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
The facet-dependent reactivity of CrMn catalysts was still unclear, hindering the further enhancement of their low-temperature SCR performance. Herein, the facet-dependent reactivity of CrMn1.5O4 catalyst for NH3-SCR of NOx was innovatively illustrated by numerous characterizations and density functional theory (DFT) calculations. Exposed (100) facet of CrMn1.5O4 catalyst exhibited best low-temperature SCR activity with ≥90 % NO conversion within 148-296 °C and 2.86 × 10-3 mol/(g·s) reaction rate within 160-240 °C. The characterizations revealed that (100) facet could induce the increase of BET specific area, electron transfer, concentration of Mn4+ and Oα, surface acidity, redox ability, NH3 and NOx adsorption/activation capacity. Subsequently, DFT calculations demonstrated that (100) facet exhibited the strongest affinity for NH3 and NO due to its unique 3O3c-Mn5c-2O4c bond and abundant charges transfer near the active adsorption sites, and Brønsted acid and oxygen vacancies were most easily formed on (100) facet. Furthermore, H2O formation as the rate determining step easily occurred on (100) facet. Eventually, we successfully improved the low-temperature SCR activity of CrMn1.5O4 catalyst by further tailoring highly active (100) facet from 0.754 to 0.865. This work provides the deeper understanding of facet-dependent reactivity and a good strategy to improve the catalytic activity of the catalysts.
Collapse
Affiliation(s)
- Ninghan Wei
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Cheng Zhao
- Guangdong Key Lab of Water & Air Pollution Control, Guangdong Province Engineering Laboratory for Air Pollution Control, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, PR China
| | - Xiaomei Hu
- Guangdong Key Lab of Water & Air Pollution Control, Guangdong Province Engineering Laboratory for Air Pollution Control, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, PR China
| | - Zhangfa Tong
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Junge Yun
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, PR China
| | - Xueying Jiang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Chengxian Liu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Keju Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Yun Zou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
| | - Zhihang Chen
- Guangdong Key Lab of Water & Air Pollution Control, Guangdong Province Engineering Laboratory for Air Pollution Control, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, PR China; College of Environment and Resources, Xiangtan University, Xiangtan, 411105, PR China.
| |
Collapse
|
9
|
Synthesis and characterization of Mn-Co co-doped TNU-9 denitration catalyst with high activity. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02059-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
10
|
Yi L, Xie J, Li C, Shan J, Liu Y, Lv J, Li M, Gao L. LaO x modified MnO x loaded biomass activated carbon and its enhanced performance for simultaneous abatement of NO and Hg 0. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:2258-2275. [PMID: 34365596 DOI: 10.1007/s11356-021-15752-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 07/27/2021] [Indexed: 06/13/2023]
Abstract
A battery of agricultural straw derived biomass activated carbons supported LaOx modified MnOx (LaMn/BACs) was prepared by a facile impregnation method and then tested for simultaneous abatement of NO and Hg0. 15%LaMn/BAC manifested excellent removal efficiency of Hg0 (100%) and NO (86.7%) at 180 °C, which also exhibited splendid resistance to SO2 and H2O. The interaction between Hg0 removal and NO removal was explored; thereinto, Hg0 removal had no influence on NO removal, while NO removal preponderated over Hg0 removal. The inhibitory effect of NH3 was greater than the accelerative effect of NO and O2 on Hg0 removal. The physicochemical characterization of related samples was characterized by SEM, XRD, BET, H2-TPR, NH3-TPD, and XPS. After incorporating suitable LaOx into 15%Mn/BAC, the synergistic effect between LaOx and MnOx contributed to the improvement of BET surface area and total pore volume, the promotion of redox ability, surface active oxygen species, and acid sites, inhibiting the crystallization of MnOx. 15%LaMn/BAC has the best catalytic oxidation activity at low temperature. That might be answerable for superior performance and preferable tolerance to SO2 and H2O. The results indicated that 15%LaMn/BAC was a promising catalyst for simultaneous abatement of Hg0 and NO at low temperature.
Collapse
Affiliation(s)
- Lei Yi
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, People's Republic of China
| | - Jinke Xie
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, People's Republic of China
| | - Caiting Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
| | - Jian Shan
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, People's Republic of China
| | - Yingyun Liu
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, People's Republic of China
| | - Junwen Lv
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, People's Republic of China
| | - Mi Li
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, People's Republic of China
| | - Lei Gao
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, People's Republic of China.
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.
| |
Collapse
|
11
|
Kim MJ, Youn JR, Lee SJ, Ryu IS, Chan Nam S, Kwan Jeong S, Goo Jeon S. Facile control of surface properties in CeO2-promoted Mn/TiO2 catalyst for low-temperature selective catalytic reduction of NO by NH3. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.01.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
12
|
Zheng H, Li R, Zhong C, Li Z, Kang Y, Deng J, Song W, Zhao Z. Theoretical Design of Transition Metal-Doped TiO2 for the Selective Catalytic Reduction of NO with NH3 by DFT Calculations. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02214h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Many transition metal oxides supported on TiO2 have been studied for selective catalytic reduction (SCR) of NO with NH3. However, the trade-off exists between the low-temperature activity and N2 selectivity....
Collapse
|
13
|
Hu M, Meng F, Li N, Zhang S, Ma J. Insight Into the CuOx Interacts with Oxygen Vacancies on the Surface of Black-TiO2 for NO Oxidation. Catal Letters 2021. [DOI: 10.1007/s10562-021-03729-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
14
|
Tao M, Ishikawa S, Zhang Z, Murayama T, Inomata Y, Kamiyama A, Nakaima I, Jing Y, Mine S, Shimoda K, Toyao T, Shimizu KI, Ueda W. Synthesis of Zeolitic Ti, Zr-Substituted Vanadotungstates and Investigation of Their Catalytic Activities for Low Temperature NH 3-SCR. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04086] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Meilin Tao
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Satoshi Ishikawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Zhenxin Zhang
- School of Material Science and Chemical Engineering, Ningbo University, Fenghua Road 818, Ningbo, Zhejiang 315211, P. R. China
| | - Toru Murayama
- Research Center for Gold Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Yusuke Inomata
- Research Center for Gold Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Akiho Kamiyama
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Ichika Nakaima
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Yuan Jing
- Institute for Catalysis, Hokkaido University, N-21, W-10 Kita-Ku, Sapporo 001-0021, Japan
| | - Shinya Mine
- Institute for Catalysis, Hokkaido University, N-21, W-10 Kita-Ku, Sapporo 001-0021, Japan
| | - Kosuke Shimoda
- Institute for Catalysis, Hokkaido University, N-21, W-10 Kita-Ku, Sapporo 001-0021, Japan
| | - Takashi Toyao
- Institute for Catalysis, Hokkaido University, N-21, W-10 Kita-Ku, Sapporo 001-0021, Japan
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Kyoto Daigaku Katsura,
Nishikyo-ku, Kyoto 615-8520, Japan
| | - Ken-ichi Shimizu
- Institute for Catalysis, Hokkaido University, N-21, W-10 Kita-Ku, Sapporo 001-0021, Japan
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Kyoto Daigaku Katsura,
Nishikyo-ku, Kyoto 615-8520, Japan
| | - Wataru Ueda
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| |
Collapse
|
15
|
Vahidzadeh E, Zeng S, Alam KM, Kumar P, Riddell S, Chaulagain N, Gusarov S, Kobryn AE, Shankar K. Harvesting Hot Holes in Plasmon-Coupled Ultrathin Photoanodes for High-Performance Photoelectrochemical Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2021; 13:42741-42752. [PMID: 34476945 DOI: 10.1021/acsami.1c10698] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The harvesting of hot carriers produced by plasmon decay to generate electricity or drive a chemical reaction enables the reduction of the thermalization losses associated with supra-band gap photons in semiconductor photoelectrochemical (PEC) cells. Through the broadband harvesting of light, hot-carrier PEC devices also produce a sensitizing effect in heterojunctions with wide-band gap metal oxide semiconductors possessing good photostability and catalytic activity but poor absorption of visible wavelength photons. There are several reports of hot electrons in Au injected over the Schottky barrier into crystalline TiO2 and subsequently utilized to drive a chemical reaction but very few reports of hot hole harvesting. In this work, we demonstrate the efficient harvesting of hot holes in Au nanoparticles (Au NPs) covered with a thin layer of amorphous TiO2 (a-TiO2). Under AM1.5G 1 sun illumination, photoanodes consisting of a single layer of ∼50 nm diameter Au NPs coated with a 10 nm shell of a-TiO2 (Au@a-TiO2) generated 2.5 mA cm-2 of photocurrent in 1 M KOH under 0.6 V external bias, rising to 3.7 mA cm-2 in the presence of a hole scavenger (methanol). The quantum yield for hot-carrier-mediated photocurrent generation was estimated to be close to unity for high-energy photons (λ < 420 nm). Au@a-TiO2 photoelectrodes produced a small positive photocurrent of 0.1 mA cm-2 even at a bias of -0.6 V indicating extraction of hot holes even at a strong negative bias. These results together with density functional theory modeling and scanning Kelvin probe force microscope data indicate fast injection of hot holes from Au NPs into a-TiO2 and light harvesting performed near-exclusively by Au NPs. For comparison, Au NPs coated with a 10 nm shell of Al2O3 (Au@Al2O3) generated 0.02 mA cm-2 of photocurrent in 1 M KOH under 0.6 V external bias. These results underscore the critical role played by a-TiO2 in the extraction of holes in Au@a-TiO2 photoanodes, which is not replicated by an ordinary dielectric shell. It is also demonstrated here that an ultrathin photoanode (<100 nm in maximum thickness) can efficiently drive sunlight-driven water splitting.
Collapse
Affiliation(s)
- Ehsan Vahidzadeh
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Sheng Zeng
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Kazi M Alam
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
- Nanotechnology Research Centre, National Research Council Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
| | - Pawan Kumar
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Saralyn Riddell
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Narendra Chaulagain
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Sergey Gusarov
- Nanotechnology Research Centre, National Research Council Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
| | - Alexander E Kobryn
- Nanotechnology Research Centre, National Research Council Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
| | - Karthik Shankar
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| |
Collapse
|
16
|
Ti3+ doped V2O5/TiO2 catalyst for efficient selective catalytic reduction of NOx with NH3. J Colloid Interface Sci 2021; 581:76-83. [DOI: 10.1016/j.jcis.2020.07.131] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 07/24/2020] [Accepted: 07/26/2020] [Indexed: 01/27/2023]
|
17
|
Wang X, Chen X, Ye L, Lu P, Liu Y, You J, Zeng W, Lu L, Hu C, Chen D. Superior performance of Cu/TiO2 catalyst prepared by ice melting method for low-temperature selective catalytic reduction of NOx by NH3. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111225] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
18
|
Yan Z, Yu J, Liu H, Ke X, Wang C, Liu L, Wei L, Yang T. A novel regeneration method for deactivated commercial NH 3-SCR catalysts with promoted low-temperature activities. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:41970-41986. [PMID: 32705549 DOI: 10.1007/s11356-020-10086-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
A novel route is developed for regeneration of deactivated commercial NH3-SCR catalysts, which includes an initial in situ construction of anatase TiO2 porous film, followed by loading of MnOx, CeOx, and Mn-Ce mixed oxides as active components. The regenerated catalysts present largely improved low-temperature denitrification performance due to the synergetic effect of MnOx and CeOx. The denitrification efficiency could reach a high value of 97% at 200 °C and 100% at 250 °C when the Ce-Mn mixed oxides are loaded at the optimized molar quantity ratio of 10:9 (Ce:Mn). Properties and reaction mechanisms of the regenerated catalysts are investigated with characterizations of X-ray photoelectron spectroscopy (XPS), NH3 temperature-programmed desorption (NH3-TPD), H2 temperature-programmed reduction (H2-TPR), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Our results demonstrate that the adsorption and oxidation of NO plays a crucial role for these three catalysts even though a difference exists on the reaction pathways. Graphical abstract.
Collapse
Affiliation(s)
- Zheng Yan
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China.
| | - Jingyao Yu
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China
| | - Huan Liu
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China
| | - Xin Ke
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China
| | - Chunyong Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 101408, People's Republic of China.
| | - Lili Liu
- Beijing Key Laboratory for Solid Waste Utilization and Management, College of Engineering, Peking University, Beijing, 100871, People's Republic of China
| | - Lihong Wei
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China
| | - Tianhua Yang
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China
| |
Collapse
|
19
|
Wu Z, Chen H, Wan Z, Zhang S, Zeng Y, Guo H, Zhong Q, Li X, Han J, Rong W. Promotional Effect of S Doping on V2O5–WO3/TiO2 Catalysts for Low-Temperature NOx Reduction with NH3. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00327] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zihua Wu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Hao Chen
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Zhongdang Wan
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Shule Zhang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Yiqing Zeng
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Haiwei Guo
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Qin Zhong
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Xiaohai Li
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Jiayou Han
- Shanghai Meishan Steel Corporation Ltd., Nanjing 210039, P. R. China
| | - Weilong Rong
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| |
Collapse
|
20
|
Zeng Y, Wu Z, Guo L, Wang Y, Zhang S, Zhong Q. Insight into the effect of carrier on N2O formation over MnO2/MOx (M = Al, Si and Ti) catalysts for selective catalytic reduction (SCR) of NOx with NH3. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110916] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
21
|
Ce-Doped V2O5-WO3/TiO2 with Low Vanadium Loadings as SCR Catalysts and the Resistance of H2O and SO2. Catal Letters 2019. [DOI: 10.1007/s10562-019-03077-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
22
|
Precursor and dispersion effects of active species on the activity of Mn-Ce-Ti catalysts for NO abatement. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0410-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
23
|
|
24
|
Liu C, Li F, Wu J, Hou X, Huang W, Zhang Y, Yang X. A comparative study of MOx (M = Mn, Co and Cu) modifications over CePO 4 catalysts for selective catalytic reduction of NO with NH 3. JOURNAL OF HAZARDOUS MATERIALS 2019; 363:439-446. [PMID: 30340173 DOI: 10.1016/j.jhazmat.2018.09.054] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 08/17/2018] [Accepted: 09/20/2018] [Indexed: 06/08/2023]
Abstract
The MOx (M = Cu, Mn, Co)/CePO4 support was firstly prepared via the hydrothermal and impregnated method. Selective catalytic reduction of NO with NH3 (NH3-SCR) results showed that the MnOx modifications greatly improved the SCR activities at low temperatures. The NOx conversion of the MnOx/CePO4 catalyst was above 80% even at 180 °C. In-situ DRIFTS results suggest that the SCR reaction is majorly conducted between the absorbed monodentate nitrate and NH3 species (i.e., the Langmuir-Hinshelwood mechanism). MOx (M = Cu, Mn, Co) exists in the formation of nano-size particles obtained by SEM and TEM directly. These nano-size particles can provide active surface adsorbed oxygen and thus improve the NO oxidation ability as indicated by the O2-TPD and NO oxidation tests. The process of NO oxidation to NO2 plays a key role to produce the absorbed monodentate nitrate as indicated by the In-situ DRIFTS. The support CePO4 acts as the acid sites to form highly active NH4+ species. The synergic effect between the MnOx and CePO4 contributed to the high SCR activity over the MnOx/CePO4 catalyst. Additionally, the MOx/CePO4 catalyst exhibits an excellent water tolerance and N2 selectivity. Consequently, the MnOx/CePO4 catalyst becomes the potential catalyst for the practical process.
Collapse
Affiliation(s)
- Cheng Liu
- Northwest Research Institute of Chemical Industry, Xi'an, 710600, China
| | - Fei Li
- Northwest Research Institute of Chemical Industry, Xi'an, 710600, China.
| | - Jing Wu
- Northwest Research Institute of Chemical Industry, Xi'an, 710600, China
| | - Xin Hou
- Northwest Research Institute of Chemical Industry, Xi'an, 710600, China
| | - Wei Huang
- Northwest Research Institute of Chemical Industry, Xi'an, 710600, China
| | - Yong Zhang
- Northwest Research Institute of Chemical Industry, Xi'an, 710600, China
| | - Xiangguang Yang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
| |
Collapse
|
25
|
Wang XT, Hu HP, Zhang XY, Su XX, Yang XD. Effect of iron loading on the performance and structure of Fe/ZSM-5 catalyst for the selective catalytic reduction of NO with NH 3. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:1706-1715. [PMID: 30448951 DOI: 10.1007/s11356-018-3513-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 10/16/2018] [Indexed: 06/09/2023]
Abstract
A series of Fe/ZSM-5 catalysts with different Fe contents were prepared by impregnation method. The catalysts were characterized by TEM, XRD, H2 temperature-programed reduction (H2-TPR), temperature-programed desorption of ammonia (NH3-TPD), and in situ diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS), and the catalytic activity test was also carried out on selective catalytic reduction (SCR) denitration device. Results showed that the single metal iron-supported ZSM-5 catalyst has high deNOx activity in the medium-high temperature range, and the optimal loading of Fe active component is 10 wt%; the deNOx efficiency over 80% at the range of 350-450 °C and 431 °C reaches the maximum of 96.91%. Iron species can be finely dispersed on the surface of the carrier as amorphous oxides, and the crystalline structure of zeolite is retained. The significant redox performance, highly dispersed nanoparticles, and rich Lewis acid sites on the surface of catalyst are favorable for the SCR denitration reaction. Fe/ZSM-5 10 wt% catalyst has rich Lewis acid sites and less B acid sites and Lewis acidic sites play an important role during the reaction. Only Eley-Rideal (E-R) mechanism existed during the NH3-SCR reaction process, and there is no denitration reaction being accomplished by L-H mechanism at 150 °C.
Collapse
Affiliation(s)
- Xue-Tao Wang
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China.
| | - Hai-Peng Hu
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China
| | - Xing-Yu Zhang
- National Engineering Lab of Coal-fired Pollution Emission Reduction, Shandong University, Jinan, 250061, China
| | - Xiao-Xin Su
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China
| | - Xiao-Dong Yang
- Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang, 471003, China
| |
Collapse
|
26
|
Low-temperature activity and mechanism of WO3-modified CeO2-TiO2 catalyst under NH3-NO/NO2 SCR conditions. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(18)63129-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
27
|
Anthonysamy SBI, Afandi SB, Khavarian M, Mohamed ARB. A review of carbon-based and non-carbon-based catalyst supports for the selective catalytic reduction of nitric oxide. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:740-761. [PMID: 29600136 PMCID: PMC5852466 DOI: 10.3762/bjnano.9.68] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 01/18/2018] [Indexed: 05/03/2023]
Abstract
Various types of carbon-based and non-carbon-based catalyst supports for nitric oxide (NO) removal through selective catalytic reduction (SCR) with ammonia are examined in this review. A number of carbon-based materials, such as carbon nanotubes (CNTs), activated carbon (AC), and graphene (GR) and non-carbon-based materials, such as Zeolite Socony Mobil-5 (ZSM-5), TiO2, and Al2O3 supported materials, were identified as the most up-to-date and recently used catalysts for the removal of NO gas. The main focus of this review is the study of catalyst preparation methods, as this is highly correlated to the behaviour of NO removal. The general mechanisms involved in the system, the Langmuir-Hinshelwood or Eley-Riedeal mechanism, are also discussed. Characterisation analysis affecting the surface and chemical structure of the catalyst is also detailed in this work. Finally, a few major conclusions are drawn and future directions for work on the advancement of the SCR-NH3 catalyst are suggested.
Collapse
Affiliation(s)
| | - Syahidah Binti Afandi
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia
| | - Mehrnoush Khavarian
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia
| | - Abdul Rahman Bin Mohamed
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia
| |
Collapse
|
28
|
Wang T, Zhang X, Liu J, Liu H, Sun B. Comparison of NO conversion over Cu/M (M = TiO2, Al2O3, ZSM-5, carbon nanotubes, activated carbon) catalysts assisted by plasma. REACTION KINETICS MECHANISMS AND CATALYSIS 2018. [DOI: 10.1007/s11144-018-1358-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
29
|
Chen Y, Zhang X, Chen W, Yang H, Chen H. The structure evolution of biochar from biomass pyrolysis and its correlation with gas pollutant adsorption performance. BIORESOURCE TECHNOLOGY 2017; 246:101-109. [PMID: 28893501 DOI: 10.1016/j.biortech.2017.08.138] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/21/2017] [Accepted: 08/22/2017] [Indexed: 05/08/2023]
Abstract
Biochar is carbon-rich, porous and with a great potential in gas pollutant controlling. The physical-chemical structure of biochar is important for the application. This paper firstly reviewed the evolution behavior of physical-chemical structure for biochar during pyrolysis. At lower temperature (<500°C), biomass firstly transformed to "3D network of benzene rings" with abundant functional groups. With temperature increasing (500-700°C), it converted to "2D structure of fused rings" with abundant porosity. As temperature increasing further (>700°C), it may transit into a "graphite microcrystalline structure", the porosity and functional groups were diminished correspondingly. The modification of biochar and its application as sorbent for gas pollutant were also reviewed. Activation and doping can significantly increase the porosity and special functional groups in biochar, which is favorable for gas pollutant adsorption. With a higher porosity, the adsorption capacity of gas pollutant is bigger, however, the functional groups determined the sorption stability of gas pollutant.
Collapse
Affiliation(s)
- Yingquan Chen
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China
| | - Xiong Zhang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China
| | - Wei Chen
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China
| | - Haiping Yang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China.
| | - Hanping Chen
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China
| |
Collapse
|