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Wan J, Yang H, Shi Y, Liu Y, Zhang J, Zhang J, Wu G, Zhou R. Effect of Cu loading content on the catalytic performance of Cu-USY catalysts for selective catalytic reduction of NO with NH 3. J Environ Sci (China) 2023; 126:445-458. [PMID: 36503771 DOI: 10.1016/j.jes.2022.03.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 03/14/2022] [Accepted: 03/16/2022] [Indexed: 06/17/2023]
Abstract
Series of Cu-USY zeolite catalyst with different Cu loading content were synthesized through simple impregnation method. The obtained catalysts were subjected to selective catalytic reduction of NOx with NH3 (NH3-SCR) performance evaluation, structural/chemical characterizations such as X-ray diffraction (XRD), N2 adsorption/desorption, H2 temperature-programmed reduction (H2-TPR), NH3 temperature-programmed desorption (NH3-TPD) as well as detailed in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) experiments including CO adsorption, NH3 adsorption and NO+O2 in situ reactions. Results show that Cu-USY with proper Cu loading (in this work 5Cu-USY with 5 wt.% Cu) could be promising candidates with highly efficient NH3-SCR catalytic performance, relatively low byproduct formation and excellent hydrothermal stability, although its SO2 poisoning tolerability needs alleviation. Further characterizations reveal that such catalytic advantages can be attributed to both active cu species and surface acid centers evolution modulated by Cu loading. On one hand, Cu species in the super cages of zeolites increases with higher Cu content and being more conducive for NH3-SCR reactivity. On the other hand, higher Cu loading leads to depletion of Brønsted acid centers and simultaneous formation of abundant Lewis acid centers, which facilitates NH4NO3 reduction via NH3 adsorbed on Lewis acid centers, thus improving SCR reactivity. However, Cu over-introduction leads to formation of surface highly dispersed CuOx, causing unfavorable NH3 oxidation and inferior N2 selectivity.
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Affiliation(s)
- Jie Wan
- Energy Research Institute, Nanjing Institute of Technology, Nanjing 211167, China; Institute of Catalysis, Zhejiang University, Hangzhou 310028, China
| | - Haipeng Yang
- Institute of Catalysis, Zhejiang University, Hangzhou 310028, China
| | - Yijun Shi
- Institute of Catalysis, Zhejiang University, Hangzhou 310028, China
| | - Yanjun Liu
- Institute of Catalysis, Zhejiang University, Hangzhou 310028, China
| | - Jin Zhang
- Energy Research Institute, Nanjing Institute of Technology, Nanjing 211167, China
| | - Jun Zhang
- Energy Research Institute, Nanjing Institute of Technology, Nanjing 211167, China
| | - Gongde Wu
- Energy Research Institute, Nanjing Institute of Technology, Nanjing 211167, China
| | - Renxian Zhou
- Institute of Catalysis, Zhejiang University, Hangzhou 310028, China.
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Li P, Xin Y, Zhang H, Yang F, Tang A, Han D, Jia J, Wang J, Li Z, Zhang Z. Recent progress in performance optimization of Cu-SSZ-13 catalyst for selective catalytic reduction of NOx. Front Chem 2022; 10:1033255. [PMID: 36324517 PMCID: PMC9621587 DOI: 10.3389/fchem.2022.1033255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 09/28/2022] [Indexed: 11/14/2022] Open
Abstract
Nitrogen oxides (NOx), which are the major gaseous pollutants emitted by mobile sources, especially diesel engines, contribute to many environmental issues and harm human health. Selective catalytic reduction of NOx with NH3 (NH3-SCR) is proved to be one of the most efficient techniques for reducing NOx emission. Recently, Cu-SSZ-13 catalyst has been recognized as a promising candidate for NH3-SCR catalyst for reducing diesel engine NOx emissions due to its wide active temperature window and excellent hydrothermal stability. Despite being commercialized as an advanced selective catalytic reduction catalyst, Cu-SSZ-13 catalyst still confronts the challenges of low-temperature activity and hydrothermal aging to meet the increasing demands on catalytic performance and lifetime. Therefore, numerous studies have been dedicated to the improvement of NH3-SCR performance for Cu-SSZ-13 catalyst. In this review, the recent progress in NH3-SCR performance optimization of Cu-SSZ-13 catalysts is summarized following three aspects: 1) modifying the Cu active sites; 2) introducing the heteroatoms or metal oxides; 3) regulating the morphology. Meanwhile, future perspectives and opportunities of Cu-SSZ-13 catalysts in reducing diesel engine NOx emissions are discussed.
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Affiliation(s)
- Pan Li
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, China
| | - Ying Xin
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, China
- *Correspondence: Ying Xin,
| | - Hanxue Zhang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, China
| | - Fuzhen Yang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, China
| | - Ahui Tang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, China
| | - Dongxu Han
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, China
| | - Junxiu Jia
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, China
| | - Jin Wang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, China
| | - Zhenguo Li
- National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center Co., Ltd., Tianjin, China
| | - Zhaoliang Zhang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, China
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In-situ One-Pot Synthesis of Ti/Cu-SSZ-13 Catalysts with Highly Efficient NH3-SCR Catalytic Performance as Well as Superior H2O/SO2 Tolerability. CATALYSIS SURVEYS FROM ASIA 2022. [DOI: 10.1007/s10563-022-09374-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Influence of Fe–Cu-SSZ-13 and hybrid Fe–Cu-SSZ-13 zeolite catalyst in ammonia-selective catalytic reduction (NH3-SCR) of NOx. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-022-02283-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Yu R, Kong H, Zhao Z, Shi C, Meng X, Xiao FS, De Baerdemaeker T, Parvulescu AN, Müller U, Zhang W. Rare‐earth Yttrium Exchanged Cu‐SSZ‐39 Zeolite with Superior Hydrothermal Stability and SO2‐Tolerance in NH3‐SCR of NOx. ChemCatChem 2022. [DOI: 10.1002/cctc.202200228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rui Yu
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Haiyu Kong
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Zhenchao Zhao
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Chuan Shi
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Xiangju Meng
- Zhejiang University Department of Chemistry CHINA
| | | | | | | | - Ulrich Müller
- BASF SE Process Research and Chemical Engineering GERMANY
| | - Weiping Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology State Key Laboratory of Fine Chemicals No.2 Linggong Road 116024 Dalian CHINA
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Liu B, Lv N, Wang C, Zhang H, Yue Y, Xu J, Bi X, Bao X. Redistributing Cu species in Cu-SSZ-13 zeolite as NH3-SCR catalyst via a simple ion-exchange. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2021.10.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Wan J, Chen J, Zhao R, Zhou R. One-pot synthesis of Fe/Cu-SSZ-13 catalyst and its highly efficient performance for the selective catalytic reduction of nitrogen oxide with ammonia. J Environ Sci (China) 2021; 100:306-316. [PMID: 33279044 DOI: 10.1016/j.jes.2020.08.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/05/2020] [Accepted: 08/05/2020] [Indexed: 06/12/2023]
Abstract
Series of Fe/Cu-SSZ-13 catalysts with different Fe loading content were synthesized by simple one-pot strategy. The obtained catalysts were subjected to selective catalytic reduction (SCR) of NOx with NH3 and were characterized by various techniques. The results show that Fe0.63/Cu1.50-SSZ-13 catalyst with proper Fe content exhibits excellent catalytic activity with widest operation temperature window from 160 to 580°C, excellent hydrothermal stability as well as good resistance to sulfur poisoning when compared with Cu-SSZ-13, signifying its great potential for practical applications. Further characterizations reveal that the synthesized Fe/Cu-SSZ-13 catalysts present typical chabazite (CHA) structure with good crystallinity, while isolated Cu2+ and monomeric Fe3+ are revealed as the predominant copper and iron species. At low temperatures, isolated Cu2+ species act as primary active sites for SCR reaction, while monomeric Fe3+ species provide sufficient active sites for sustain the SCR activity at high temperature. Moreover, Fe over doping would lead to the damage of zeolite structure, destruction of isolated Cu2+ site, as well as the formation of highly oxidizing Fe2O3, thus causing deterioration of catalytic performances.
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Affiliation(s)
- Jie Wan
- Energy Research Institute, Nanjing Institute of Technology, Nanjing 211167, China
| | - Jiawei Chen
- Institute of Catalysis, Zhejiang University, Hangzhou 310028, China
| | - Ru Zhao
- Institute of Catalysis, Zhejiang University, Hangzhou 310028, China
| | - Renxian Zhou
- Institute of Catalysis, Zhejiang University, Hangzhou 310028, China.
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He D, Wang Z, Deng D, Deng S, He H, Liu L. Synthesis of Cu-SSZ-13 catalyst by using different silica sources for NO-SCR by NH3. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2019.110738] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Effect of Copper Precursors on the Activity and Hydrothermal Stability of CuII−SSZ−13 NH3−SCR Catalysts. Catalysts 2019. [DOI: 10.3390/catal9090781] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A series of CuII−SSZ−13 catalysts are prepared by in-situ hydrothermal method using different copper precursors (CuII(NO3)2, CuIISO4, CuIICl2) for selective catalytic reduction of NO by NH3 in a simulated diesel vehicle exhaust. The catalysts were characterized by X−ray diffraction (XRD), scanning electron microscope (SEM), X−ray photoelectron spectroscopy (XPS), N2 adsorption-desorption, hydrogen-temperature-programmed reduction (H2−TPR), ammonia temperature-programmed desorption (NH3−TPD), and 27Al and 29Si solid state Nuclear Magnetic Resonance (NMR). The CuII−SSZ−13 catalyst prepared by CuII(NO3)2 shows excellent catalytic activity and hydrothermal stability. The NO conversion of CuII−SSZ−13 catalyst prepared by CuII(NO3)2 reaches 90% at 180 °C and can remain above 90% at a wide temperature range of 180–700 °C. After aging treatment at 800 °C for 20 h, the CuII−SSZ−13 catalyst prepared by CuII(NO3)2 still exhibits above 90% NO conversion under a temperature range of 240–600 °C. The distribution of Cu species and the Si/Al ratios in the framework of the synthesized CuII−SSZ−13 catalysts, which determine the catalytic activity and the hydrothermal stability of the catalysts, are dependent on the adsorption capacity of anions to the cation during the crystallization process due to the so called Hofmeister anion effects, the NO3− ion has the strongest adsorption capacity among the three kinds of anions (NO3−, Cl−, and SO42−), followed by Cl– and SO42– ions. Therefore, the CuII−SSZ−13 catalyst prepared by CuII(NO3)2 possess the best catalytic ability and hydrothermal stability.
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Yue Y, Liu B, Lv N, Wang T, Bi X, Zhu H, Yuan P, Bai Z, Cui Q, Bao X. Direct Synthesis of Hierarchical FeCu‐ZSM‐5 Zeolite with Wide Temperature Window in Selective Catalytic Reduction of NO by NH
3. ChemCatChem 2019. [DOI: 10.1002/cctc.201901104] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yuanyuan Yue
- National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou University Fuzhou 350002 P.R. China
| | - Ben Liu
- National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou University Fuzhou 350002 P.R. China
| | - Nangui Lv
- National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou University Fuzhou 350002 P.R. China
| | - Tinghai Wang
- National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou University Fuzhou 350002 P.R. China
| | - Xiaotao Bi
- National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou University Fuzhou 350002 P.R. China
- Department of Chemical & Biological EngineeringUniversity of British Columbia Vancouver BC V6T 1Z3 Canada
| | - Haibo Zhu
- National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou University Fuzhou 350002 P.R. China
| | - Pei Yuan
- National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou University Fuzhou 350002 P.R. China
| | - Zhengshuai Bai
- State Key Laboratory of Photocatalysis on Energy & Environment College of ChemistryFuzhou University Fuzhou 350116 P.R. China
| | - Qingyan Cui
- National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou University Fuzhou 350002 P.R. China
| | - Xiaojun Bao
- National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou University Fuzhou 350002 P.R. China
- State Key Laboratory of Photocatalysis on Energy & Environment College of ChemistryFuzhou University Fuzhou 350116 P.R. China
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