1
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Liu Y, Wang N, Xie H, Sun Y, Yang K, Zhang L, Yang C, Ge C. Promotion of SO 2 resistance of Ce-La/TiO 2 denitrification catalysts by V doping. RSC Adv 2024; 14:2264-2276. [PMID: 38213965 PMCID: PMC10777473 DOI: 10.1039/d3ra07073e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 12/10/2023] [Indexed: 01/13/2024] Open
Abstract
Conventional cerium-based denitrification catalysts show good catalytic activity at moderate and high temperatures, but their denitrification performance may be decreased due to poisoning by SO2 in the flue gas. In this paper, V was introduced into Ce-La/TiO2 catalysts by a ball-milling method, and the effects of the V content on catalyst denitrification performance and SO2 resistance were investigated. Fourier-transform diffuse reflectance in situ infrared spectroscopy was used to examine the denitrification mechanism and evaluate the catalysts for surface acidity, redox characteristics, and SO2 adsorption. After introducing V, Brønsted acids played the dominant role in the catalytic reaction by increasing the number of acidic sites on the catalyst surface, adsorbing NH3 to participate in the reaction, and improving the sulfur resistance by inhibiting SO2 poisoning. The Ce3+ and O ratio on the catalyst surface were also enhanced by V doping, which reduced interactions between SO2 and the primary metal oxide active ingredients. The modified catalyst inhibited the formation of sulfate species on the catalyst surface and prevented the generation of additional nitrate species on the surface, which protected the main active sites. After V doping, the NH3-SCR reaction on the catalyst surface followed the Langmuir-Hinshelwood mechanism.
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Affiliation(s)
- Yang Liu
- Xi'an University of Science and Technology Xi'an 710054 Shaanxi China
| | - Na Wang
- Shaanxi University of Science and Technology Xi'an 710016 Shaanxi China +86-29-82202335 +86-29-82203378
| | - Huidong Xie
- Xi'an University of Architecture and Technology Xi'an 710055 Shaanxi China
| | - Yepeng Sun
- Xi'an University of Science and Technology Xi'an 710054 Shaanxi China
| | - Kaiyue Yang
- Xi'an University of Science and Technology Xi'an 710054 Shaanxi China
| | - Liang Zhang
- Xi'an University of Science and Technology Xi'an 710054 Shaanxi China
| | - Chang Yang
- Xi'an University of Architecture and Technology Xi'an 710055 Shaanxi China
| | - Chengmin Ge
- Shandong Dongyuan New Material Technology Co. 257300 Shandong China
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2
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Qin F, Fan X, Ma W. Selective Oxidation of Triethylamine Catalyzed by Mn-Ce/ZSM-5. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37220175 DOI: 10.1021/acs.langmuir.3c00696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The selective catalytic oxidation (SCO) of triethylamine (TEA) to harmless nitrogen (N2), carbon dioxide (CO2), and water (H2O) is of green elimination technology. In this paper, Mn-Ce/ZSM-5 with different proportions of MnOx/CeOx were studied for the selective catalytic combustion of TEA. The catalysts were characterized by XRD, BET, H2-TPR, XPS, and NH3-TPD and their catalytic activities were analyzed. The results showed that MnOx was the main active component. The addition of a small amount of CeOx promotes the generation of high-valence Mn ions, which reduces the reduction temperature of the catalyst and increases the redox capacity of the catalyst. In addition, the synergistic effect between CeOx and MnOx significantly improves the mobility of reactive oxygen species on the catalyst, thus improving the catalytic performance of the catalyst. The catalytic oxidation performance of TEA over 15Mn5Ce/ZSM-5 is the highest. TEA can be completely converted at 220 °C, and the selectivity for N2 is up to 80%. The reaction mechanism was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS).
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Affiliation(s)
- Fan Qin
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, People's Republic of China
| | - Xiaojuan Fan
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, People's Republic of China
| | - Weihua Ma
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, People's Republic of China
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3
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Gao Y, He X, Mao K, Russell CK, Toan S, Wang A, Chien T, Cheng F, Russell AG, Zeng XC, Fan M. Catalytic CO 2 Capture via Ultrasonically Activating Dually Functionalized Carbon Nanotubes. ACS NANO 2023; 17:8345-8354. [PMID: 37075195 DOI: 10.1021/acsnano.2c12762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
High energy consumption and high cost have been the obstacles for large-scale deployment of all state-of-the-art CO2 capture technologies. Finding a transformational way to improve mass transfer and reaction kinetics of the CO2 capture process is timely for reducing carbon footprints. In this work, commercial single-walled carbon nanotubes (CNTs) were activated with nitric acid and urea under ultrasonication and hydrothermal methods, respectively, to prepare N-doped CNTs with the functional group of -COOH, which possesses both basic and acid functionalities. The chemically modified CNTs with a concentration of 300 ppm universally catalyze both CO2 sorption and desorption of the CO2 capture process. The increases in the desorption rate achieved with the chemically modified CNTs can reach as high as 503% compared to that of the sorbent without the catalyst. A chemical mechanism underlying the catalytic CO2 capture is proposed based on the experimental results and further confirmed by density functional theory computations.
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Affiliation(s)
- Yangyan Gao
- Departments of Chemical and Petroleum Engineering, University of Wyoming, Laramie, Wyoming 82071, United States
- College of Environmental & Resource Sciences, Shanxi University, Taiyuan, Shanxi 030001, P.R. China
| | - Xin He
- Departments of Chemical and Petroleum Engineering, University of Wyoming, Laramie, Wyoming 82071, United States
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, P.R. China
| | - Keke Mao
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243032, P.R. China
| | - Christopher K Russell
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sam Toan
- Department of Chemical Engineering, University of Minnesota, Duluth, Minnesota 55812, United States
| | - Aron Wang
- Department of Physics & Astronomy, University of Wyoming, Laramie, Wyoming 82071, United States
| | - TeYu Chien
- Department of Physics & Astronomy, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Fangqin Cheng
- College of Environmental & Resource Sciences, Shanxi University, Taiyuan, Shanxi 030001, P.R. China
| | - Armistead G Russell
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Xiao Cheng Zeng
- Department of Materials Science & Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
| | - Maohong Fan
- Departments of Chemical and Petroleum Engineering, University of Wyoming, Laramie, Wyoming 82071, United States
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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4
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Tang J, Wang X, Li H, Xing L, Liu M. The Resistance of SO 2 and H 2O of Mn-Based Catalysts for NO x Selective Catalytic Reduction with Ammonia: Recent Advances and Perspectives. ACS OMEGA 2023; 8:7262-7278. [PMID: 36872970 PMCID: PMC9979361 DOI: 10.1021/acsomega.2c06796] [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: 10/26/2022] [Accepted: 01/11/2023] [Indexed: 06/18/2023]
Abstract
The treatment of NO x has become an urgent issue due to it being difficult to degrade in air and its tremendous adverse impact on public health. Among numerous NO x emission control technologies, the technology of selective catalytic reduction (SCR) using ammonia (NH3) as the reducing agent (NH3-SCR) is regarded as the most effective and promising technique. However, the development and application of high-efficiency catalysts is severely limited due to the poisoning and deactivation effect by SO2 and H2O vapor in the low-temperature NH3-SCR technology. In this review, recent advances in the catalytic effects from increasing the rate of the activity in low-temperature NH3-SCR by manganese-based catalysts and the stability of resistance to H2O and SO2 during catalytic denitration are reviewed. In addition, the denitration reaction mechanism, metal modification, preparation methods, and structures of the catalyst are highlighted, and the challenges and potential solutions for the design of a catalytic system for degenerating NO x over Mn-based catalysts with high resistance of SO2 and H2O are discussed in detail.
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5
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Manganese-based catalysts supported on carbon xerogels for the selective catalytic reduction of NOx using a hollow fibre-based reactor. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.01.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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6
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Catalytic reduction of NO and oxidation of dichloroethane over α-MnO2 catalysts: properties-reactivity relationship. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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7
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Li N, Ren C, Hou L, Jiao K, Wu W. Study on NH3-SCR performance and mechanism of Mn supported SO42−-CeCO3F-CePO4 catalysts. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Gui R, Yan Q, Xue T, Gao Y, Li Y, Zhu T, Wang Q. The promoting/inhibiting effect of water vapor on the selective catalytic reduction of NO x. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129665. [PMID: 35907283 DOI: 10.1016/j.jhazmat.2022.129665] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/02/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
In the field of nitrogen oxides (NOx) abatement, developing selective catalytic reduction (SCR) catalysts that can operate stably in the practical conditions remains a big challenge because of the complexity and uncertainty of actual flue gas emissions. As water vapor is unavoidable in the actual flue gas, it is indispensable to explore its effect on the performance of SCR catalysts. Many studies have proved that the effects of H2O on de-NOx activity of SCR catalysts were indeed observed during SCR reactions operated under wet conditions. Whether the effect is promotive or inhibitory depends on the reaction conditions, catalyst types and reducing agents used in SCR reaction. This review focuses on the effect of H2O on SCR catalysts and SCR reaction, including promoting effect, inhibiting effect, as well as the effecting mechanism. Besides, various strategies for developing a water-resistant SCR catalyst are also included. We hope that this work can give a more comprehensive insight into the effects of H2O on SCR catalysts and help with the rational design of water-resistant SCR catalysts for further practical application in NOx abatement field.
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Affiliation(s)
- Rongrong Gui
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Qinghua Yan
- Qingdao Engineering Research Center for Rural Environment, College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China
| | - Tianshan Xue
- Institute of Atmospheric Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Yanshan Gao
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Yuran Li
- Research Center for Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Tingyu Zhu
- Research Center for Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Qiang Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
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9
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Li H, Zhang S, Zhang A, Zhang X, Sun Z, Yang C, Zhu Q. Effect of Bimetal Element Doping on the Low-Temperature Activity of Manganese-Based Catalysts for NH3-SCR. Front Chem 2022; 10:957051. [PMID: 35936091 PMCID: PMC9354830 DOI: 10.3389/fchem.2022.957051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 06/23/2022] [Indexed: 11/29/2022] Open
Abstract
A series of novel Mn6Zr1-xCox denitrification catalysts were prepared by the co-precipitation method. The effect of co-modification of MnOx catalyst by zirconium and cobalt on the performance of NH3-SCR was studied by doping transition metal cobalt into the Mn6Zr1 catalyst. The ternary oxide catalyst Mn6Zr0.3Co0.7 can reach about 90% of NOx conversion in a reaction temperature range of 100–275°C, and the best NOx conversion can reach up to 99%. In addition, the sulfur resistance and water resistance of the Mn6Zr0.3Co0.7 catalyst were also tested. When the concentration of SO2 is 200ppm, the NOx conversion of catalyst Mn6Zr0.3Co0.7 is still above 90%. 5 Vol% H2O has little effect on catalyst NOx conversion. The results showed that the Mn6Zr0.3Co0.7 catalyst has excellent resistance to sulfur and water. Meanwhile, the catalyst was systematically characterized. The results showed that the addition of zirconium and cobalt changes the surface morphology of the catalyst. The specific surface area, pore size, and volume of the catalyst were increased, and the reduction temperature of the catalyst was decreased. In conclusion, the doping of zirconium and cobalt successfully improves the NH3-SCR activity of the catalyst.
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Affiliation(s)
- Haixia Li
- *Correspondence: Haixia Li, ; Anchao Zhang,
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10
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Liu Y, Shi X, Hu J, Liu K, Zeng M, Hou Y, Wei Z. Highly Effective Activated Carbon-Supported Ni-Mn Bifunctional Catalyst for Selective Hydrodeoxygenation of 5-Hydroxymethylfurfural to 2,5-Dimethylfuran. CHEMSUSCHEM 2022; 15:e202200193. [PMID: 35333002 DOI: 10.1002/cssc.202200193] [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: 01/27/2022] [Revised: 03/15/2022] [Indexed: 06/14/2023]
Abstract
Designing highly efficient and low-cost catalysts for conversion of renewable biomass into high value-added chemicals and biofuels is important and challenging. Herein, a non-noble Ni-Mn bifunctional catalyst supported on activated carbon (Ni-Mn/AC) was developed by an incipient wetness impregnation method. The catalyst was found to be economic and efficient for the selective hydrodeoxygenation of biomass-derived 5-hydroxymethylfurfural (5-HMF) to 2,5-dimethylfuran (2,5-DMF). The optimal Ni-Mn/AC (Ni/Mn=3) catalyst achieved 98.5 % 2,5-DMF yield with 100 % conversion of 5-HMF under mild reaction conditions of 180 °C, 2.0 MPa H2 for 4 h. Furthermore, the catalyst exhibited outstanding reusability and could be recycled eight times without loss of activity. The addition of Mn not only enhanced the reactivity of 5-HMF but also resulted in the dominant reaction pathway shift from the hydrogenation of the C=O bond to the hydrogenolysis of C-OH bond, which was attributed to the synergy of highly dispersed Ni metallic nanoparticles and moderate Lewis acid sites from MnOx as revealed by detailed characterizations.
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Affiliation(s)
- Yingxin Liu
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, P. R. China
| | - Xiaoyang Shi
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, P. R. China
| | - Jinbo Hu
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, P. R. China
| | - Kai Liu
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, P. R. China
| | - Mao Zeng
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, P. R. China
| | - Yaxin Hou
- Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Zuojun Wei
- Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
- Institute of Zhejiang University-Quzhou Jiuhua Boulevard North, 324000, Quzhou, P. R. China
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11
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Ordered Mesoporous MnAlOx Oxides Dominated by Calcination Temperature for the Selective Catalytic Reduction of NOx with NH3 at Low Temperature. Catalysts 2022. [DOI: 10.3390/catal12060637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Manganese alumina composited oxides (MnAlOx) catalysts with ordered mesoporous structure prepared by evaporation-induced self-assembly (EISA) method was designed for the selective catalytic reduction (SCR) of NOx with NH3 at low temperature. The effect of calcination temperature of MnAlOx catalysts was investigated systematically, and it was correlated with SCR activity. Results showed that with an increase in calcination temperature, the SCR activity of MnAlOx catalysts increased. When the calcination temperature was raised up to 800 °C, the NOx conversion was more than 90% in the operation temperature range of 150~240 °C. Through various characterization analysis, it was found that MnAlOx-800 °C catalysts possessed enhanced redox capacities as the higher content of Mn4+/(Mn3+ + Mn4+). Moreover, the improved redox properties could contribute to a higher NOx adsorption and activation ability, which lead to higher SCR performance of MnAlOx-800 °C catalysts. In situ DRIFTs revealed that the adsorbed NO2 and bidentate nitrate are the reactive intermediate species, and NH3 species bonded to Lewis acid sites taken part in SCR progress. The SCR progress predominantly followed E–R mechanism, while L–H mechanism also takes effect to a certain degree.
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12
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Wang Y, Wang Y, Kong Z, Kang Y, Zhan L. Manganese oxide nanorod catalysts for low-temperature selective catalytic reduction of NO with NH 3. RSC Adv 2022; 12:17182-17189. [PMID: 35755592 PMCID: PMC9180140 DOI: 10.1039/d1ra06758c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 03/31/2022] [Indexed: 12/04/2022] Open
Abstract
MnOx nanorod catalysts were successfully synthesized by two different preparation methods using porous SiO2 nanorods as the template and investigated for the low-temperature selective catalytic reduction (SCR) of NO with NH3. The catalysts were characterized by scanning electron microscopy, transmission electron microscopy, nitrogen adsorption, X-ray diffraction, X-ray photoelectron spectroscopy, and NH3 temperature-programmed desorption. The results show that the obtained MnOx-P nanorod catalyst prepared by redox precipitation method exhibits higher NO removal activity than that prepared by the solvent evaporation method in the low temperature range of 100–180 °C, where about 98% NO conversion is achieved over MnOx(0.36)-P nanorods. The reason is mainly attributed to MnOx(0.36)-P nanorods possessing unique flower-like morphology and mesoporous structures with high pore volume, which facilitates the exposure of more active sites of MnOx and the adsorption of reactant gas molecules. Furthermore, there is a lower crystallinity of MnOx, higher percentage of Mn4+ species and a large amount of strong acid sites on the surface. These factors contribute to the excellent low-temperature SCR activity of MnOx(0.36)-P nanorods. Compared with MnOx(0.36)-E nanorods, MnOx(0.36)-P nanorods possess unique flower-like morphology and mesoporous structures with high pore volume, contributing to the excellent low-temperature SCR activity of MnOx(0.36)-P nanorods.![]()
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Affiliation(s)
- Yifan Wang
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914 +86 21 64252924
| | - Yanli Wang
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914 +86 21 64252924
| | - Zhenkai Kong
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914 +86 21 64252924
| | - Ying Kang
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914 +86 21 64252924
| | - Liang Zhan
- State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64252914 +86 21 64252924
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13
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Promoting mechanism of SO2 resistance performance by anatase TiO2 {0 0 1} facets on Mn-Ce/TiO2 catalysts during NH3-SCR reaction. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117438] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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14
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Kong M, Zhang H, Wang Y, Liu Q, Liu W, Wu H. Deactivation mechanisms of MnO -CeO2/Ti-bearing blast furnace slag low-temperature SCR catalyst by PbO and PbCl2. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112209] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Novel Mn–Ce bi-oxides loaded on 3D monolithic nickel foam for low-temperature NH3-SCR de-NO : Preparation optimization and reaction mechanism. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2020.12.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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16
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Song W, Ji J, Guo K, Wang X, Wei X, Cai Y, Tan W, Li L, Sun J, Tang C, Dong L. Solid-phase impregnation promotes Ce doping in TiO2 for boosted denitration of CeO2/TiO2 catalysts. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.07.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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17
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Duan C, Guo R, Liu Y, Wu G, Miao Y, Gu J, Pan W. Enhancement of potassium resistance of Ce–Ti oxide catalyst for NH3-SCR reaction by modification with holmium. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2020.10.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Ko S, Gao F, Yao X, Yi H, Tang X, Wang C, Liu H, Luo N, Qi Z. Synthesis of metal–organic frameworks (MOFs) and their application in the selective catalytic reduction of NO x with NH 3. NEW J CHEM 2022. [DOI: 10.1039/d2nj02358j] [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
This review summarizes the synthesis, applications for the NH3-SCR and methods for strengthening the water resistance and thermal stability of MOF catalysts.
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Affiliation(s)
- Songjin Ko
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Department of Chemistry, Pyongyang University of Architecture, Pyongyang, DPR of Korea
| | - 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
| | - Xiaolong Yao
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, 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
| | - 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
| | - Chengzhi Wang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Hengheng Liu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ning Luo
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhiying Qi
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
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19
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Tan Y, Li F, Zhao B, Chen W, Tian M. Hydrothermal Synthesis of a Ce-Zr-Ti Mixed Oxide Catalyst with Enhanced Catalytic Performance for a NH 3-SCR Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14823-14832. [PMID: 34915697 DOI: 10.1021/acs.langmuir.1c02597] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A series of mesoporous CeZrTiOx catalysts were prepared by a facile hydrothermal method. Compared with CeTiOx catalysts synthesized under the same conditions, the catalytic activity and anti-SO2 performance of the Ce1Zr1TiOx catalyst are greatly improved, and at the gas hourly space velocity (GHSV) of 60 000 h-1, the NOx removal efficiency is maintained at 90% in the temperature range of 290-500 °C. The catalytic effect of ZrO2 on the Ce-Ti catalyst NH3-SCR activity was elucidated through a series of characterizations. The results revealed that the doping of Zr could significantly improve and optimize the structure of Ce-Ti catalysts. At the same time, due to the doping of Zr, the synergistic effect between Ce and Zr in the CeZrTiOx catalyst can effectively increase oxygen mobility, total acid content, and surface adsorbed oxygen species and lead to a larger pore volume. In addition, the introduction of ZrO2 made the transformation of Ce4+ into Ce3+ more obvious, and the 2Ce4+ + Zr2+ ↔ 2Ce3+ + Zr4+ reaction greatly improved the reducibility of Ce1Zr1TiOx. Among them, the improvement of SCR performance and H2O/SO2 tolerance is due to the electronic interaction between Zr and Ce.
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Affiliation(s)
- Yifeng Tan
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - 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
| | - 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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20
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Yang R, Gao Z, Sun M, Fu G, Cheng G, Liu W, Yang X, Zhao X, Yu L. A highly active VO -MnO /CeO2 for selective catalytic reduction of NO: The balance between redox property and surface acidity. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2020.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Yang R, Peng S, Lan B, Sun M, Zhou Z, Sun C, Gao Z, Xing G, Yu L. Oxygen Defect Engineering of β-MnO 2 Catalysts via Phase Transformation for Selective Catalytic Reduction of NO. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2102408. [PMID: 34337868 DOI: 10.1002/smll.202102408] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/21/2021] [Indexed: 06/13/2023]
Abstract
The catalysts for low-temperature selective catalytic reduction of NO with NH3 (NH3 -SCR) are highly desired due to the large demand in industrial furnaces. The characteristic of low-temperature requires the catalyst with rich active sites especially the redox sites. Herein, the authors obtain oxygen defect-rich β-MnO2 from a crystal phase transformation process during air calcination, by which the as-prepared γ-MnO2 nanosheet and nanorod can be conformally transformed into the corresponding β-MnO2 . Simultaneously, this transformation accompanies oxygen defects modulation resulted from lattice rearrangement. The most active β-MnO2 nanosheet with plentiful oxygen defects shows a high efficiency of > 90% NO conversion in an extremely wide operation window of ≈120-350 °C. The detailed characterizations and density functional theory (DFT) calculations reveal that the introduction of oxygen defects enhances the adsorption properties for reactants and decreases the energy barriers of *NH2 formation more than 0.3 eV (≈0.32-0.37 eV), which contributes to a high efficiency of low-temperature SCR activity. The authors finding provides a feasible approach to achieve the oxygen defect engineering and gains insight into manganese-based catalysts for low-temperature NO removal or pre-oxidation.
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Affiliation(s)
- Runnong Yang
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light IndustryGuangdong University of Technology, Guangzhou, 510006, China
| | - Shaomin Peng
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light IndustryGuangdong University of Technology, Guangzhou, 510006, China
| | - Bang Lan
- School of Chemistry and Environment, Jiaying University, Meizhou, 514015, China
| | - Ming Sun
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light IndustryGuangdong University of Technology, Guangzhou, 510006, China
| | - Zihao Zhou
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light IndustryGuangdong University of Technology, Guangzhou, 510006, China
| | - Changyong Sun
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light IndustryGuangdong University of Technology, Guangzhou, 510006, China
| | - Zihan Gao
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light IndustryGuangdong University of Technology, Guangzhou, 510006, China
| | - Guichuan Xing
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, 999078, China
| | - Lin Yu
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light IndustryGuangdong University of Technology, Guangzhou, 510006, China
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22
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Enhancement of low-temperature NH3-SCR catalytic activity and H2O & SO2 resistance over commercial V2O5-MoO3/TiO2 catalyst by high shear-induced doping of expanded graphite. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.04.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Tang X, Wang C, Gao F, Zhang R, Shi Y, Yi H. Acid modification enhances selective catalytic reduction activity and sulfur dioxide resistance of manganese-cerium-cobalt catalysts: Insight into the role of phosphotungstic acid. J Colloid Interface Sci 2021; 603:291-306. [PMID: 34214720 DOI: 10.1016/j.jcis.2021.06.114] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 06/08/2021] [Accepted: 06/20/2021] [Indexed: 10/21/2022]
Abstract
Improving the SO2 resistance of catalysts is crucial to driving commercial applications of Mn-based catalysts. In this work, the phosphotungstic acid (HPW) modification strategy was applied to improve the N2 selectivity, SO2 and H2O resistance of the Mn-Ce-Co catalyst, and further, the mechanism of HWP modification on enhanced catalytic performance was explored. The results showed that HPW-Mn-Ce-Co catalyst exhibits higher NOx conversion (~100% at 100-250 °C) and N2 selectivity (exceed 80% at 50-350 °C) due to more oxygen vacancies, greater surface acidity, and lower redox capacity. In situ diffused reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) reveal that HPW changed the reaction path of Mn-Ce-Co catalysts, promoted the adsorption and activation of NH3, and reduced the effect of SO2 on the active bidentate nitrate species, and thereby exhibiting good SO2 resistance. X-ray photoelectron spectrometer (XPS) and NH3 temperature-programmed desorption of (NH3-TPD) results show that HPW can inhibit the formation of metal sulfate, and SO2 can be combined with Ce species more easily. The generated Ce2(SO3)3 can not only protect Mn species but also increase the acid sites and weaken the poisoning effect of metal sulfate. This study provides a simple design strategy for the catalyst to improve the low-temperature catalytic performance and toxicity resistance.
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Affiliation(s)
- Xiaolong Tang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, PR China
| | - Chengzhi Wang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Fengyu Gao
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, PR China
| | - Runcao Zhang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Yiran Shi
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Honghong Yi
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, PR China.
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24
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Facile synthesis of hollow nanotube MnCoOx catalyst with superior resistance to SO2 and alkali metal poisons for NH3-SCR removal of NOx. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118517] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Manafi A, MirMoghtadaei G, Falamaki C. Aerosol Assisted Chemical Vapor Deposition of Mn(acac)2 for MnOx/(Clay-Bonded SiC) Catalyst Synthesis for Propane-SCR of NOx. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621050107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Xu G, Guo X, Cheng X, Yu J, Fang B. A review of Mn-based catalysts for low-temperature NH 3-SCR: NO x removal and H 2O/SO 2 resistance. NANOSCALE 2021; 13:7052-7080. [PMID: 33889905 DOI: 10.1039/d1nr00248a] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The development of high-efficiency catalysts is the key to the low-temperature NH3-SCR technology. The introduction of SO2 and H2O will lead to poisoning and deactivation of the catalysts, which severely limits the development and application of NH3-SCR technology. This review introduces the necessity of NOx removal, explains the mechanisms of H2O and SO2 poisoning on NH3-SCR catalysts, highlights the Mn-based catalysts of different active metals and supports and their resistance to H2O and SO2, and analyses the relationship between metal modification, selection of support and preparation method, morphology and structure design and SO2/H2O resistance. Given the current problems, this review points out the future research focus of Mn-based catalysts and also puts forward corresponding countermeasures to solve the existing problems.
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Affiliation(s)
- Guiying Xu
- College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
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27
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Youn JR, Kim MJ, Lee SJ, Ryu IS, Yoon HC, Jeong SK, Lee K, Jeon SG. The influence of CNTs addition on Mn-Ce/TiO2 catalyst for low-temperature NH3-SCR of NO. CATAL COMMUN 2021. [DOI: 10.1016/j.catcom.2021.106282] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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28
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Mosrati J, Atia H, Eckelt R, Huyen Vuong T, Rabeah J, Mhamdi M, Armbruster U. Ta and Mo oxides supported on CeO2-TiO2 for the selective catalytic reduction of NOx with NH3 at low temperature. J Catal 2021. [DOI: 10.1016/j.jcat.2021.01.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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29
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Zhao S, Shi JW, Niu C, Wang B, He C, Liu W, Xiao L, Ma D, Wang H, Cheng Y. FeVO 4-supported Mn–Ce oxides for the low-temperature selective catalytic reduction of NO x by NH 3. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01424b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Iron vanadate (FeVO4) nanorods are used as a carrier to support manganese (Mn) and cerium (Ce) oxides for the selective catalytic reduction (SCR) of nitrogen oxides (NOx) with NH3 for the first time.
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Affiliation(s)
- Shuqi Zhao
- State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jian-Wen Shi
- State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Cihang Niu
- State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Baorui Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Chi He
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Wei Liu
- Qiyuan (Xi'an) Dae Young Environmental Protection Technology Co., Ltd., Xi'an 710018, China
| | - Lei Xiao
- Qiyuan (Xi'an) Dae Young Environmental Protection Technology Co., Ltd., Xi'an 710018, China
| | - Dandan Ma
- State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hongkang Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yonghong Cheng
- State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
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30
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Chen Q, Yang Y, Luo H, Liu Z, Tong Z, Tao C, Du J. Ce regulated surface properties of Mn/SAPO-34 for improved NH 3-SCR at low temperature. RSC Adv 2020; 10:40047-40054. [PMID: 35520869 PMCID: PMC9057469 DOI: 10.1039/d0ra06639g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 10/20/2020] [Indexed: 12/03/2022] Open
Abstract
Ce modified MnO x /SAPO-34 was prepared and investigated for low-temperature selective catalytic reduction of NO x with ammonia (NH3-SCR). The 0.3Ce-Mn/SAPO-34 catalyst had nearly 95% NO conversion at 200-350 °C at a space velocity of 10 000 h-1. Microporous SAPO-34 as the support provided the catalyst with increased hydrothermal stability. XPS and H2-TPR results proved that the Mn4+ and Oα content increased after incorporation of Ce, this promoted the conversion of NO at low temperature via a 'fast SCR' route. NH3-TPD measurements combined oxidation experiments of NO, NH3 indicated the reduction of both the surface acidity and the amount of acid sites, which effectively decreased the NH3 oxditaion to NO or N2O at elevated temperature and promoted the catalytic selectivity for nitrogen. A redox cycle between manganese oxide and Ce was assumed for the active oxygen transfer and facilitated the catalyst durability.
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Affiliation(s)
- Qizhi Chen
- School of Chemistry and Chemical Engineering, Guangxi University Nanning 530004 China
- Guangxi Huiyuan Manganese Industry Co., Ltd. China
| | - Yong Yang
- College of Chemistry and Chemical Engineering, Chongqing University Chongqing 401331 China
| | - Hang Luo
- College of Chemistry and Chemical Engineering, Chongqing University Chongqing 401331 China
| | - Zuohua Liu
- College of Chemistry and Chemical Engineering, Chongqing University Chongqing 401331 China
| | - Zhangfa Tong
- School of Chemistry and Chemical Engineering, Guangxi University Nanning 530004 China
| | - Changyuan Tao
- College of Chemistry and Chemical Engineering, Chongqing University Chongqing 401331 China
| | - Jun Du
- College of Chemistry and Chemical Engineering, Chongqing University Chongqing 401331 China
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31
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Pan B, Chen J, Zhang F, Zhang B, Li D, Zhong Z, Xing W. Porous TiO2 aerogel-modified SiC ceramic membrane supported MnOx catalyst for simultaneous removal of NO and dust. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118366] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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32
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Yang C, Tang X, Yi H, Gao F, Zhao S, Zhang R, Zhu W. Comparison of Selective Catalytic Reduction Performance of Mn–Co Bi‐Metal Oxides Prepared by Different Methods. ChemistrySelect 2020. [DOI: 10.1002/slct.202001748] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chen Yang
- Department of Environmental Engineering School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 PR China
| | - Xiaolong Tang
- Department of Environmental Engineering School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 PR China
| | - Honghong Yi
- Department of Environmental Engineering School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 PR China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing 100083 PR China
| | - Fengyu Gao
- Department of Environmental Engineering School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 PR China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing 100083 PR China
| | - Shunzheng Zhao
- Department of Environmental Engineering School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 PR China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing 100083 PR China
| | - Runcao Zhang
- Department of Environmental Engineering School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 PR China
| | - Wenjuan Zhu
- Department of Environmental Engineering School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 PR China
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33
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Liu YZ, Xu QY, Guo RT, Duan CP, Wu GL, Miao YF, Gu JW. Enhancement of the activity of Cu/TiO 2 catalyst by Eu modification for selective catalytic reduction of NO x with NH 3. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:27663-27673. [PMID: 32394254 DOI: 10.1007/s11356-020-09101-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
The Cu/TiO2 catalysts with the addition of Eu were developed by the sol-gel way for the selective catalytic reduction (SCR) of NOx by NH3. Activity tests revealed that CuEu/TiO2-0.15 catalyst showed the optimal de-NOx performance in a wide temperature range (150-300 °C), along with an admirable SO2 tolerance. According to characterization analysis, the relationship between the NH3-SCR performance and physicochemical characters of samples was explored. The adjunction of Eu on Cu/TiO2 catalyst can contribute to the formation of a large amount of Cu2+, adsorbed oxygen, and acid sites on the catalyst surface. Moreover, the Eu addition on Cu/TiO2 is favorable to the generation of activated NOx and NH3 substances adsorbed on the catalyst surface, which would conduce to the NH3-SCR process by Langmuir-Hinshelwood (L-H) mechanism effectively.
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Affiliation(s)
- Yuan-Zhen Liu
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China
| | - Qi-Yan Xu
- School of Metallurgical Engineering, Anhui University of Technology, Manshan, 243032, Anhui Province, People's Republic of China.
| | - Rui-Tang Guo
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China.
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China.
| | - Chao-Peng Duan
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China
| | - Gui-Lin Wu
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China
| | - Yu-Fang Miao
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China
| | - Jing-Wen Gu
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China
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34
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Influence of CeO2 loading on structure and catalytic activity for NH3-SCR over TiO2-supported CeO2. J RARE EARTH 2020. [DOI: 10.1016/j.jre.2020.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Li X, Wu Z, Zeng Y, Han J, Zhang S, Zhong Q. Reduced TiO2 inducing highly active V2O5 species for selective catalytic reduction of NO by NH3. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137494] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Duan CP, Guo RT, Wu GL, Pan WG. Selective catalytic reduction of NO x by NH 3 over CeVO 4-CeO 2 nanocomposite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:22818-22828. [PMID: 32323228 DOI: 10.1007/s11356-020-08875-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
In this study, it was found that the CeVO4-CeO2 nanocomposite possessed remarkably selective catalytic reduction (SCR) performance and wider active temperature scope. And, the promotion principle was explored based on BET, XRD, XPS, H2-temperature-programmed reduction, NH3-temperature-programmed desorption, and in situ diffuse reflectance infrared Fourier transform (DRIFT) techniques. The characterization outcomes manifested that the CeVO4-CeO2 nanocomposite could inhibit its crystallinity and enhance the concentrations of chemisorbed oxygen species and Ce3+, which was advantageous to the SCR process. Moreover, the in situ DRIFT technique manifested that the NH3-SCR reaction over Ce0.75V0.25Oy was enhanced effectively through the mechanism of L-H.
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Affiliation(s)
- Chao-Peng Duan
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China
| | - Rui-Tang Guo
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China.
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China.
| | - Gui-Lin Wu
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China
| | - Wei-Guo Pan
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, People's Republic of China.
- Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, People's Republic of China.
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37
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Promoting Effect of Ti Species in MnOx-FeOx/Silicalite-1 for the Low-Temperature NH3-SCR Reaction. Catalysts 2020. [DOI: 10.3390/catal10050566] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Manganese and iron oxides catalysts supported on silicalite-1 and titanium silicalite-1 (TS-1) are synthesized by the wet impregnation method for the selective catalytic reduction (SCR) of NOx with NH3 (NH3-SCR), respectively. The optimized catalyst demonstrates an increased NOx conversion efficiency of 20% below 150 °C, with a space velocity of 18,000 h−1, which can be attributed to the incorporation of Ti species. The presence of Ti species enhances surface acidity and redox ability of the catalyst without changing the structure of supporter. Moreover, further researches based on in situ NH3 adsorption reveal that Lewis acid sites linked to Mn4+ on the surface have a huge influence on the improvement of denitration efficiency of the catalyst at low temperatures.
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38
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Jiang Y, Yang L, Liang G, Liu S, Gao W, Yang Z, Wang X, Lin R, Zhu X. The poisoning effect of PbO on CeO2-MoO3/TiO2 catalyst for selective catalytic reduction of NO with NH3. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110877] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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39
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Relationship Between Oxygen-Containing Groups and Acidity of Graphene Oxide Supported Mn-Based SCR Catalysts and the Effects on the Catalytic Activity. Catal Letters 2020. [DOI: 10.1007/s10562-020-03218-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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40
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Gholami Z, Luo G, Gholami F, Yang F. Recent advances in selective catalytic reduction of NOx by carbon monoxide for flue gas cleaning process: a review. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2020. [DOI: 10.1080/01614940.2020.1753972] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Zahra Gholami
- Unipetrol Centre of Research and Education, Litvínov, Czech Republic
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
| | - Guohua Luo
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
| | - Fatemeh Gholami
- New Technologies - Research Centre, University of West Bohemia, Engineering of Special Materials, Plzeň, Czech Republic
| | - Fan Yang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
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41
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Yao L, Liu Q, Mossin S, Nielsen D, Kong M, Jiang L, Yang J, Ren S, Wen J. Promotional effects of nitrogen doping on catalytic performance over manganese-containing semi-coke catalysts for the NH 3-SCR at low temperatures. JOURNAL OF HAZARDOUS MATERIALS 2020; 387:121704. [PMID: 31780294 DOI: 10.1016/j.jhazmat.2019.121704] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 11/15/2019] [Accepted: 11/15/2019] [Indexed: 06/10/2023]
Abstract
A series of nitrogen-doped MnOx/semi-coke catalysts were studied for low-temperature (LT) de-NOx performance in the NH3-SCR reaction. Changes in morphology, structure, and surface chemistry of the semi-coke catalysts were systematically investigated to analyze the promotional effects of nitrogen doping on catalytic performance. The catalytic activity of ASC-10U10 Mn was found to be enhanced significantly in a broad temperature range of 100-300 °C, improving 44.2 % at 150 °C-the largest jump in this temperature range-and reaching 94.5 % at 275 °C. Nitrogen doping results in aromatic pyridinic-N, pyrrolic-N, and quaternary-N; the unpaired electrons on these groups play a critical role in enhancing the adsorption and oxidation of NO. NH3 adsorption is enhanced due to numerous diverse Lewis acid sites on ASC-10U10 Mn. The electron distribution of MnOx/semi-coke catalysts and the electron mobility between manganese and oxygen species are improved by nitrogen doping. The resulting nitrate intermediates, especially bridging nitrates, can be reduced by NH3 species at low temperatures. The increase in the number of oxygen vacancies improves oxidation of coordinated NH3. In addition, DRIFTS results suggest that coordinated NH3 and intermediate -NH2 are much more active and make a considerable positive contribution to the LT SCR reaction.
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Affiliation(s)
- Lu Yao
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; Department of Chemistry, Technical University of Denmark, Lyngby, 2800, Denmark
| | - Qingcai Liu
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
| | - Susanne Mossin
- Department of Chemistry, Technical University of Denmark, Lyngby, 2800, Denmark.
| | - David Nielsen
- Department of Chemistry, Technical University of Denmark, Lyngby, 2800, Denmark
| | - Ming Kong
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; Department of Chemistry, Technical University of Denmark, Lyngby, 2800, Denmark
| | - Lijun Jiang
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Jie Yang
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Shan Ren
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
| | - Juan Wen
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; Chongqing Cheng Tou Road and Bridge Administration Co. Ltd, Chongqing, 400060, China
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42
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Niu C, Wang Y, Ren D, Xiao L, Duan R, Wang B, Wang X, Xu Y, Li Z, Shi JW. The deposition of VWOx on the CuCeOy microflower for the selective catalytic reduction of NOx with NH3 at low temperatures. J Colloid Interface Sci 2020; 561:808-817. [DOI: 10.1016/j.jcis.2019.11.063] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/15/2019] [Accepted: 11/15/2019] [Indexed: 10/25/2022]
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43
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Zhao L, Kang M. Mechanism and regeneration of sulfur-poisoned Mn-promoted calcined NiAl hydrotalcite-like compounds for C 3H 6-SCR of NO. RSC Adv 2020; 10:3716-3725. [PMID: 35492661 PMCID: PMC9049091 DOI: 10.1039/c9ra09087h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 12/16/2019] [Indexed: 11/30/2022] Open
Abstract
The selective catalytic reduction of NO with propene (C3H6-SCR) in the presence of SO2 was investigated over a series of Mn-promoted calcined NiAl hydrotalcite-like compounds. The obtained 5% MnNiAlO catalyst exhibits superior NO conversion efficiency (95%) at 240 °C, and excellent sulfur-poisoning resistance. The possible reaction pathways of the catalytic process were proposed according to several characterization measurements. It is demonstrated that Mn-promoted NiAlO catalysts enhance the Brønsted acid sites and surface active oxygen groups, and improve the redox properties by the redox cycle (Ni3+ + Mn2+ ↔ Ni2+ + Mn4+). Thus, the amount of the reaction intermediates is improved, and the reactivities between CxHyOz species and nitrite/nitrate species are promoted. Furthermore, in the presence of SO2, the MnNiAlO samples can give rise to minor formation of sulfate and inhibit the competitive adsorption effectively due to their nitrite/nitrate species being more abundant and stable. Finally, regeneration was studied using in situ FTIR and the water washing method showed the best performance on the regeneration of S-poisoned catalysts. The selective catalytic reduction of NO with propene (C3H6-SCR) in the presence of SO2 was investigated over a series of Mn-promoted calcined NiAl hydrotalcite-like compounds.![]()
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Affiliation(s)
- Ling Zhao
- School of Ecology and Environment, Inner Mongolia University China .,Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida USA
| | - Mengdi Kang
- School of Ecology and Environment, Inner Mongolia University China
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44
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Gu J, Zhu B, Duan R, Chen Y, Wang S, Liu L, Wang X. Highly dispersed MnO x–FeO x supported by silicalite-1 for the selective catalytic reduction of NO x with NH 3 at low temperatures. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00001a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
MnOx–FeOx-Loaded silicalite-1 catalysts exhibit high NOx conversion at low temperatures.
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Affiliation(s)
- Jialiang Gu
- Beijing Key Laboratory for Solid Waste Utilization and Management
- Department of Energy and Resources Engineering
- College of Engineering
- Peking University
- Beijing 100871
| | - Bingjun Zhu
- School of Space and Environment
- Beihang University
- Beijing 100191
- PR China
| | - Rudi Duan
- Beijing Key Laboratory for Solid Waste Utilization and Management
- Department of Energy and Resources Engineering
- College of Engineering
- Peking University
- Beijing 100871
| | - Yan Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control
- School of Environment
- Tsinghua University
- Beijing
- PR China
| | - Shaoxin Wang
- Beijing Key Laboratory for Solid Waste Utilization and Management
- Department of Energy and Resources Engineering
- College of Engineering
- Peking University
- Beijing 100871
| | - Lili Liu
- Beijing Key Laboratory for Solid Waste Utilization and Management
- Department of Energy and Resources Engineering
- College of Engineering
- Peking University
- Beijing 100871
| | - Xidong Wang
- Beijing Key Laboratory for Solid Waste Utilization and Management
- Department of Energy and Resources Engineering
- College of Engineering
- Peking University
- Beijing 100871
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45
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Liu J, Liu Y, Ni Y, Liu H, Zhu W, Liu Z. Enhanced propane dehydrogenation to propylene over zinc-promoted chromium catalysts. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01921a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A small-size Zn–Cr spinel with defect sites formed by adding Zn to Cr2O3 is favorable for the PDH reaction.
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Affiliation(s)
- Jie Liu
- National Engineering Laboratory for Methanol to Olefins
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- Dalian 116023
- China
- Dalian National Laboratory for Clean Energy
| | - Yong Liu
- National Engineering Laboratory for Methanol to Olefins
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- Dalian 116023
- China
- Dalian National Laboratory for Clean Energy
| | - Youming Ni
- National Engineering Laboratory for Methanol to Olefins
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- Dalian 116023
- China
- Dalian National Laboratory for Clean Energy
| | - Hongchao Liu
- National Engineering Laboratory for Methanol to Olefins
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- Dalian 116023
- China
- Dalian National Laboratory for Clean Energy
| | - Wenliang Zhu
- National Engineering Laboratory for Methanol to Olefins
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- Dalian 116023
- China
- Dalian National Laboratory for Clean Energy
| | - Zhongmin Liu
- National Engineering Laboratory for Methanol to Olefins
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- Dalian 116023
- China
- Dalian National Laboratory for Clean Energy
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46
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Gao E, Huang B, Zhao Z, Pan H, Zhang W, Li Y, Bernards MT, He Y, Shi Y. Understanding the co-effects of manganese and cobalt on the enhanced SCR performance for MnxCo1−xCr2O4 spinel-type catalysts. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00872a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel ternary Mn0.1Co0.9Cr2O4 catalyst was identified from a range of chromium-based spinel-type oxides for the SCR of NOx in coking flue gas. The SCR reaction mainly occurs between the adsorbed NH3 and the adsorbed nitrates, following the Langmuir–Hinshelwood mechanism.
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Affiliation(s)
- Erhao Gao
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
| | - Bei Huang
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Zilong Zhao
- College of Biology and Environmental Engineering
- Zhejiang Shuren University
- Hangzhou 310015
- China
| | - Hua Pan
- College of Biology and Environmental Engineering
- Zhejiang Shuren University
- Hangzhou 310015
- China
| | - Wei Zhang
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
| | - Younan Li
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
| | - Matthew T. Bernards
- Department of Chemical and Materials Engineering
- University of Idaho
- Moscow 83844
- USA
| | - Yi He
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
- Department of Chemical Engineering
| | - Yao Shi
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
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47
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Lee MJ, Kim DH, Lee M, Ye B, Jeong B, Lee D, Kim HD, Lee H. Enhanced NO x removal efficiency for SCR catalyst of well-dispersed Mn-Ce nanoparticles on hexagonal boron nitride. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:36107-36116. [PMID: 30835067 DOI: 10.1007/s11356-019-04619-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
This research is conducted to improve the dispersion of MnOx-CeO2 catalyst because manganese is easily aggregated during continuous thermal environment at operating temperature. Aggregated MnOx particles on the support can be a major reason to degrade the catalyst performance. Therefore, the improved dispersion of MnOx particles leads to the enhancement of the catalyst performance by utilizing hexagonal boron nitride (h-BN) which is well known as thermally stable material. Due to the dispersion of MnOx-CeO2 with 5-20 nm particle size, h-BN-supported MnOx-CeO2 catalyst shows the 93% efficiency in NOx removal at 200 °C. The structure and properties of MnOx-CeO2/h-BN catalyst are characterized by X-ray diffraction, Fourier transform infrared spectroscopy spectra, and NH3-temperature programmed desorption. Then, NOx removal efficiency of catalyst is evaluated on a fixed bed reactor and h-BN-supported catalyst, (Mn0.2-Ce0.1)/BN, increases NOx removal efficiency up to 20% at 200 °C in spite of 2/3 reduced content of MnOx-CeO2 compared to no-supported catalyst (Mn0.3-Ce0.15).
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Affiliation(s)
- Myeung-Jin Lee
- Green Materials and Processes Group, Korea Institute of Industrial Technology, Ulsan, 44413, Republic of Korea
- Department of Material Science and Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Do-Hyun Kim
- School of Electrical Engineering, Korea University, Seoul, 02473, Republic of Korea
| | - Minwoo Lee
- Green Materials and Processes Group, Korea Institute of Industrial Technology, Ulsan, 44413, Republic of Korea
- Department of Material Science and Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Bora Ye
- Green Materials and Processes Group, Korea Institute of Industrial Technology, Ulsan, 44413, Republic of Korea
| | - Bora Jeong
- Green Materials and Processes Group, Korea Institute of Industrial Technology, Ulsan, 44413, Republic of Korea
| | - DuckHyun Lee
- Green Materials and Processes Group, Korea Institute of Industrial Technology, Ulsan, 44413, Republic of Korea
| | - Hong-Dae Kim
- Green Materials and Processes Group, Korea Institute of Industrial Technology, Ulsan, 44413, Republic of Korea.
| | - Heesoo Lee
- Department of Material Science and Engineering, Pusan National University, Busan, 46241, Republic of Korea.
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48
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Constructing hollow silkworm structure in MnOx–TiO2 catalysts for improving the performance in selective catalytic reduction of NO by NH3. REACTION KINETICS MECHANISMS AND CATALYSIS 2019. [DOI: 10.1007/s11144-019-01669-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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49
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Wu X, Meng H, Du Y, Liu J, Hou B, Xie X. Fabrication of Highly Dispersed Cu-Based Oxides as Desirable NH 3-SCR Catalysts via Employing CNTs To Decorate the CuAl-Layered Double Hydroxides. ACS APPLIED MATERIALS & INTERFACES 2019; 11:32917-32927. [PMID: 31414788 DOI: 10.1021/acsami.9b08699] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this study, three kinds of CuAl-LDO/CNT (LDO, layered double oxide) catalysts were prepared by the assembly of CNTs and CuAl-LDH (LDH, layered double hydroxides) as well as subsequently structural topological transformation. The effects of the assembly method on the surface structure property and the DeNOx performance of the prepared samples were systematically investigated. It was found that three CuAl-LDO/CNT catalysts showed preferable NH3-SCR catalytic performance compared with CuAl-LDO where the catalyst CuAl-LDO/CNTs(I) exhibited optimum NOx conversion (>80%) and N2 selectivity (>90%) within 180-300 °C. Such fine catalytic performance can be attributed to the proper surface acidity and redox ability of the catalyst, which might be correlated with the high dispersion of Cu-based active centers caused by the induced nucleation and effective separation action of LDH by carbon nanotubes. In addition, the outstanding H2O and SO2 resistance of the CuAl-LDO/CNTs(I) catalyst was also obtained because of the synergistic effect between CuAl-LDO and CNTs, which could greatly promote the activation and decomposition of ammonium sulfate at lower temperatures.
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Affiliation(s)
- Xu Wu
- College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Taiyuan 030024 , PR China
| | - Hao Meng
- College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Taiyuan 030024 , PR China
| | - Yali Du
- College of Chemistry and Chemical Engineening , Jinzhong University , Jinzhong 030619 , PR China
| | - Jiangning Liu
- College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Taiyuan 030024 , PR China
| | - Benhui Hou
- College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Taiyuan 030024 , PR China
| | - Xianmei Xie
- College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Taiyuan 030024 , PR China
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50
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Han L, Cai S, Gao M, Hasegawa JY, Wang P, Zhang J, Shi L, Zhang D. Selective Catalytic Reduction of NOx with NH3 by Using Novel Catalysts: State of the Art and Future Prospects. Chem Rev 2019; 119:10916-10976. [DOI: 10.1021/acs.chemrev.9b00202] [Citation(s) in RCA: 568] [Impact Index Per Article: 113.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Lupeng Han
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Sixiang Cai
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
- School of Materials Science and Engineering, Hainan University, Haikou 570228, Hainan, China
| | - Min Gao
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Jun-ya Hasegawa
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Penglu Wang
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Jianping Zhang
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Liyi Shi
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Dengsong Zhang
- Department of Chemistry, College of Sciences, State Key Laboratory of Advanced Special Steel, Research Center of Nano Science and Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
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