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Jia Y, Zheng R, Yuan J, Zhang X, Wang R, Gu M, Zhang S, Chen Y, Guo L. Promoting catalytic performance by balancing acid and redox sites on Mn3O4–Mn2P2O7/TiO2 for selective catalytic reduction of NO by NH3 at low temperature. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Szymaszek-Wawryca A, Summa P, Duraczyńska D, Díaz U, Motak M. Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH 3-SCR). MATERIALS (BASEL, SWITZERLAND) 2022; 15:7884. [PMID: 36431374 PMCID: PMC9696415 DOI: 10.3390/ma15227884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/01/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
A series of clinoptilolite-supported catalysts, modified with hydrotalcite-like phase (HT) by co-precipitation, were prepared and tested in NH3-SCR reactions. It was found that deposition of HT on clinoptilolite increased conversion of NO within 250-450 °C, and that the positive impact on the catalytic activity was independent of HT loading. The promoting effect of clinoptilolite was attributed to Brönsted acid sites present in the zeolite, which facilitated adsorption and accumulation of ammonia during the catalytic process. Concentration of N2O in the post-reaction gas mixture reached its maximum at 300 °C and the by-product was most likely formed as a consequence of NH4NO3 decomposition or side reaction of NH3 oxidation in the high-temperature region. The gradual elimination of nitrous oxide, noticed as the material with the highest concentration of hydrotalcite phase, was attributed to the abundance of oligomeric iron species and the superior textural parameters of the material. UV-Vis experiments performed on the calcined samples indicated that Fe sites of higher nuclearity were generated by thermal decomposition of the hydrotalcite phase during the catalytic reaction. Therefore, calcination of the materials prior to the catalytic tests was not required to obtain satisfactory overall catalytic performance in NO reductions.
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Affiliation(s)
- Agnieszka Szymaszek-Wawryca
- Faculty of Energy and Fuels, AGH University of Science and Technology, Al. Adama Mickiewicza 30, 30-059 Krakow, Poland
| | - Paulina Summa
- Faculty of Energy and Fuels, AGH University of Science and Technology, Al. Adama Mickiewicza 30, 30-059 Krakow, Poland
| | - Dorota Duraczyńska
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Ul. Niezapominajek 8, 30-239 Krakow, Poland
| | - Urbano Díaz
- Instituto de Tecnología Química, UPV-CSIC, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos, s/n, 46022 Valencia, Spain
| | - Monika Motak
- Faculty of Energy and Fuels, AGH University of Science and Technology, Al. Adama Mickiewicza 30, 30-059 Krakow, Poland
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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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Wang L, Ren Y, Yu X, Yu D, Peng C, Zhou Q, Hou J, Zhong C, Yin C, Fan X, Zhao Z, Cheng K, Chen Y, Sojka Z, Kotarba A, Wei Y, Liu J. Facile preparation, catalytic performance and reaction mechanism of MnxCo1-xOδ/3DOM-m Ti0.7Si0.2W0.1Oy catalysts for the simultaneous removal of soot and NOx. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00077f] [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
In this work, three-dimensionally ordered macroporous-mesoporous Ti0.7Si0.2W0.1Oy (3DOM-m TiSiWO) supported MnxCo1-xOδ catalysts with different x values were prepared using the colloidal crystal template method and incipient wetness impregnation method. The...
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Wang Z, Lan J, Haneda M, Liu Z. Selective catalytic reduction of NOx with NH3 over a novel Co-Ce-Ti catalyst. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.05.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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New insights into MnCe(Ba)O /TiO2 composite oxide catalyst: Barium additive accelerated ammonia conversion. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2020.06.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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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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Geng C, Li Z, Cui J, Kang Y, Zhang C, Li P, Yang C. Low-temperature NO reduction performance of peanut shell-derived few-layer graphene loaded CeCoxMn1-xO3 catalyst. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1721008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Cui Geng
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
| | - Zhifang Li
- College of Materials Science and Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
- Heilongjiang Provincial Key Laboratory of Polymeric Composite Material, College of Materials Science and Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
| | - Jinxing Cui
- College of Materials Science and Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
- Heilongjiang Provincial Key Laboratory of Polymeric Composite Material, College of Materials Science and Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
| | - Yan Kang
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
| | - Chao Zhang
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
| | - Peng Li
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
| | - Changlong Yang
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
- College of Materials Science and Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
- Heilongjiang Provincial Key Laboratory of Polymeric Composite Material, College of Materials Science and Engineering, Qiqihar University, Qiqihar, Heilongjiang, China
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Insights over Titanium Modified FeMgOx Catalysts for Selective Catalytic Reduction of NOx with NH3: Influence of Precursors and Crystalline Structures. Catalysts 2019. [DOI: 10.3390/catal9060560] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Titanium modified FeMgOx catalysts with different precursors were prepared by coprecipitation method with microwave thermal treatment. The iron precursor is a key factor affecting the surface active component. The catalyst using FeSO4 and Mg(NO3)2 as precursors exhibited enhanced catalytic activity from 225 to 400 °C, with a maximum NOx conversion of 100%. Iron oxides existed as γ-Fe2O3 in this catalyst. They exhibited highly enriched surface active oxygen and surface acidity, which were favorable for low-temperature selective catalytic reduction (SCR) reaction. Besides, it showed advantage in surface area, spherical particle distribution and pores connectivity. Amorphous iron-magnesium-titanium mixed oxides were the main phase of the catalysts using Fe(NO3)3 as a precursor. This catalyst exhibited a narrow T90 of 200/250–350 °C. Side reactions occurred after 300 °C producing NOx, which reduced the NOx conversion. The strong acid sites inhibited the side reactions, and thus improved the catalytic performance above 300 °C. The weak acid sites appeared below 200 °C, and had a great impact on the low-temperature catalytic performance. Nevertheless, amorphous iron-magnesium-titanium mixed oxides blocked the absorption and activation between NH3 and the surface strong acid sites, which was strengthened on the γ-Fe2O3 surface.
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Liu S, Feng X, Liu J, Lin Q, Xiong L, Wang Y, Xu H, Wang J, Chen Y. Investigation of the selective catalytic reduction of NO with NH 3 over the WO 3/Ce 0.68Zr 0.32O 2 catalyst: the role of H 2O in SO 2 inhibition. NEW J CHEM 2019. [DOI: 10.1039/c8nj04939d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of H2O and SO2 on the selective catalytic reduction of NOx by NH3 (NH3-SCR) over WO3/Ce0.68Zr0.32O2 at 250 °C was systematically investigated using various characterization techniques.
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Affiliation(s)
- Shuang Liu
- College of Chemistry
- Sichuan University
- Sichuan
- P. R. China
| | - Xi Feng
- Sinocat Environmental Technology Co., Ltd
- Chengdu 611731
- P. R. China
| | - Jingying Liu
- College of Chemistry
- Sichuan University
- Sichuan
- P. R. China
| | - Qingjin Lin
- College of Chemistry
- Sichuan University
- Sichuan
- P. R. China
| | - Lei Xiong
- College of Chemistry
- Sichuan University
- Sichuan
- P. R. China
| | - Yun Wang
- Sinocat Environmental Technology Co., Ltd
- Chengdu 611731
- P. R. China
| | - Haidi Xu
- Institute of New Energy and Low-Carbon Technology
- Sichuan University
- Chengdu 610064
- P. R. China
- Sichuan Provincial Environment Protection Environmental Catalytic Materials Engineering Technology Center
| | - Jianli Wang
- College of Chemistry
- Sichuan University
- Sichuan
- P. R. China
- Sichuan Provincial Environment Protection Environmental Catalytic Materials Engineering Technology Center
| | - Yaoqiang Chen
- College of Chemistry
- Sichuan University
- Sichuan
- P. R. China
- Institute of New Energy and Low-Carbon Technology
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Shi JW, Wang Y, Duan R, Gao C, Wang B, He C, Niu C. The synergistic effects between Ce and Cu in CuyCe1−yW5Ox catalysts for enhanced NH3-SCR of NOx and SO2 tolerance. Catal Sci Technol 2019. [DOI: 10.1039/c8cy01949e] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Non-manganese-based metal oxides are promising catalysts for the NH3-SCR (selective catalytic reduction) of NOx at low temperatures.
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Affiliation(s)
- 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
| | - Yao 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
| | - Ruibin Duan
- Guangdong Provincial Academy of Building Research Group Co., Ltd
- Guangzhou 510530
- China
| | - Chen Gao
- 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
| | - 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
| | - Chi He
- Department of Environmental Science and Engineering
- School of Energy and Power Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Chunming 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
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Yang Y, Liu S, Zhao H, Li H, Qu R, Zhang S, Zhu X, Zheng C, Gao X. Promotional effect of doping Cu into cerium-titanium binary oxides catalyst for deep oxidation of gaseous dichloromethane. CHEMOSPHERE 2019; 214:553-562. [PMID: 30286422 DOI: 10.1016/j.chemosphere.2018.09.128] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 09/03/2018] [Accepted: 09/20/2018] [Indexed: 06/08/2023]
Abstract
In recent years, significant effort has been made in the development of novel catalysts for the total oxidation of chlorinated volatile organic compounds. In this work the catalytic activity of Cu doped cerium-titanium binary oxides for the oxidation of dichloromethane (DCM) have been studied for the first time. Combining catalysts characterization and activity data, it was found that Cu ions can uniformly disperse into titanium dioxide to form solid solution and induce the creation of additional surface oxygen species on the catalysts surface, while moderate amount of Ce ions are still needed for the activation of CCl. Detailed analysis of the in-situ FTIR experiment results revealed that the surface oxygen species, especially the hydroxyl groups associated with Cu ions, can promote the deep oxidation of the intermediate species formed in the nucleophilic substitution process occurred on the active sites of catalysts surface. The sample with the Cu/Ce molar ratio of 1:3 obtained a better CO2 selectivity than that reached with cerium-titanium binary oxides. Meanwhile, according to element balance analysis, removal of chlorine from the catalyst surface was also promoted by Cu doping.
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Affiliation(s)
- Yang Yang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Shaojun Liu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Haitao Zhao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Hao Li
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Ruiyang Qu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Shuo Zhang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Xuecheng Zhu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Chenghang Zheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China.
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13
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Selective catalytic reduction of NO with NH3 over titanium modified Fe Mg O catalysts: Performance and characterization. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.02.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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2D, 3D mesostructured silicas templated mesoporous manganese dioxide for selective catalytic reduction of NOx with NH3. J Colloid Interface Sci 2018; 516:254-262. [DOI: 10.1016/j.jcis.2018.01.048] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/08/2018] [Accepted: 01/12/2018] [Indexed: 11/24/2022]
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Wang Y, Xue R, Zhao C, Liu F, Liu C, Han F. Effects of Ce in the catalytic combustion of toluene on CuxCe1-xFe2O4. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.12.067] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Recent Progress on Establishing Structure–Activity Relationship of Catalysts for Selective Catalytic Reduction (SCR) of NOx with NH3. CATALYSIS SURVEYS FROM ASIA 2017. [DOI: 10.1007/s10563-017-9237-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Influence of 300 °C thermal conversion of Fe-Ce hydrous oxides prepared by hydrothermal precipitation on the adsorptive performance of five anions: Insights from EXAFS/XANES, XRD and FTIR (companion paper). J Colloid Interface Sci 2017; 491:111-122. [DOI: 10.1016/j.jcis.2016.12.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/01/2016] [Accepted: 12/04/2016] [Indexed: 11/22/2022]
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DeNO x performance and characteristic study for transition metals doped iron based catalysts. KOREAN J CHEM ENG 2017. [DOI: 10.1007/s11814-016-0369-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Chubar N, Gerda V, Banerjee D, Yablokova G. Effect of Fe(II)/Ce(III) dosage ratio on the structure and anion adsorptive removal of hydrothermally precipitated composites: Insights from EXAFS/XANES, XRD and FTIR. J Colloid Interface Sci 2017; 487:388-400. [DOI: 10.1016/j.jcis.2016.10.060] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 10/07/2016] [Accepted: 10/22/2016] [Indexed: 11/28/2022]
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