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Feng F, Li H, Yang X, Wang C, Zhao Y, Wang H, Du J. The Effect P Additive on the CeZrAl Support Properties and the Activity of the Pd Catalysts in Propane Oxidation. Materials (Basel) 2024; 17:1003. [PMID: 38473476 DOI: 10.3390/ma17051003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/17/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024]
Abstract
The properties of a catalyst support are closely related to the catalyst activity, yet the focus is often placed on the active species, with little attention given to the support properties. In this work, we specifically investigated the changes in support properties after the addition of P, as well as their impact on catalyst activity when used for catalyst preparation. We prepared the CeO2-ZrO2-P2O5-Al2O3 (CeZrPAl) composite oxides using the sol-gel, impregnation, and mechanical mixing methods, and characterized the support properties using techniques such as XRD, XPS, SEM-EDS, N2 adsorption-desorption, and Raman spectra. The results showed that the support prepared using the sol-gel method can exhibit a more stable phase structure, larger surface area, higher adsorption capacity for oxygen species, and greater oxygen storage capacity. The addition of an appropriate amount of P is necessary. On the one hand, the crystallization and growth of CePO4 can lead to a decrease in the Ce content in the cubic phase ceria-zirconia solid solution, resulting in a phase separation of the ceria-zirconia solid solution. On the other hand, CePO4 can lock some of the Ce3+/Ce4+ redox pairs, leading to a reduction in the adsorption of oxygen species and a decrease in the oxygen storage capacity of the CeZrPAl composite oxides. The research results indicated that the optimal P addition is 6 wt.% in the support. Therefore, we prepared a Pd/CeZrPAl catalyst using CeZrAl with 6 wt.% P2O5 as the support and conducted the catalytic oxidation of C3H8. Compared with the support without P added, the catalyst activity of the support loaded with P was significantly improved. The fresh and aged (1000 °C/5 h) catalysts decreased by 20 °C and 5 °C in T50 (C3H8 conversion temperature of 50%), and by 81 °C and 15 °C in T90 (C3H8 conversion temperature of 90%), respectively.
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Affiliation(s)
- Feng Feng
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
- State-Local Joint Engineering Research Center of Precious Metal Catalytic Technology and Application, Kunming Sino-Platinum Metals Catalysts Co., Ltd., Kunming 650106, China
| | - Hong Li
- Yunnan Precious Metal Laboratory Co., Ltd., Kunming 650100, China
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650100, China
| | - Xingxia Yang
- State-Local Joint Engineering Research Center of Precious Metal Catalytic Technology and Application, Kunming Sino-Platinum Metals Catalysts Co., Ltd., Kunming 650106, China
- Yunnan Precious Metal Laboratory Co., Ltd., Kunming 650100, China
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650100, China
| | - Chengxiong Wang
- State-Local Joint Engineering Research Center of Precious Metal Catalytic Technology and Application, Kunming Sino-Platinum Metals Catalysts Co., Ltd., Kunming 650106, China
- Yunnan Precious Metal Laboratory Co., Ltd., Kunming 650100, China
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650100, China
| | - Yunkun Zhao
- State-Local Joint Engineering Research Center of Precious Metal Catalytic Technology and Application, Kunming Sino-Platinum Metals Catalysts Co., Ltd., Kunming 650106, China
- Yunnan Precious Metal Laboratory Co., Ltd., Kunming 650100, China
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650100, China
| | - Hua Wang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Junchen Du
- State-Local Joint Engineering Research Center of Precious Metal Catalytic Technology and Application, Kunming Sino-Platinum Metals Catalysts Co., Ltd., Kunming 650106, China
- Yunnan Precious Metal Laboratory Co., Ltd., Kunming 650100, China
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650100, China
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Chen J, Zhang G, Wu Y, Hu W, Qu P, Wang Y, Zhong L, Chen Y. Pd Supported on Alumina Using CePO 4 as an Additive: Phosphorus-Resistant Catalyst for Emission Control in Vehicles Fueled by Natural Gas. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06997] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jianjun Chen
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, P. R. China
| | - Guochen Zhang
- College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Yang Wu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, P. R. China
| | - Wei Hu
- Institute of Atmospheric Environment, Chongqing Academy of Environmental Science, Chongqing 401147, P. R. China
| | - Pengfei Qu
- College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Yun Wang
- Sinocat Environmental Technology Company, Ltd., Chengdu 610064, P. R. China
| | - Lin Zhong
- College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Yaoqiang Chen
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, P. R. China
- College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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Abstract
This review presents recent advances in TWCs for NGVs, particularly for Pd-based catalysts and potential alternatives.
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Affiliation(s)
- Cenyan Huang
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
| | - Wenpo Shan
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
| | - Zhihua Lian
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
| | - Yan Zhang
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
| | - Hong He
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Institute of Urban Environment
- Chinese Academy of Sciences
- Xiamen 361021
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Englund J, Xie K, Dahlin S, Schaefer A, Jing D, Shwan S, Andersson L, Carlsson P, Pettersson LJ, Skoglundh M. Deactivation of a Pd/Pt Bimetallic Oxidation Catalyst Used in a Biogas-Powered Euro VI Heavy-Duty Engine Installation. Catalysts 2019; 9:1014. [DOI: 10.3390/catal9121014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The reduction of anthropogenic greenhouse gas emissions is crucial to avoid further warming of the planet. We investigated how effluent gases from a biogas powered Euro VI heavy-duty engine impact the performance of a bimetallic (palladium and platinum) oxidation catalyst. Using synthetic gas mixtures, the oxidation of NO, CO, and CH4 before and after exposure to biogas exhaust for 900 h was studied. The catalyst lost most of its activity for methane oxidation, and the activity loss was most severe for the inlet part of the aged catalyst. Here, a clear sintering of Pt and Pd was observed, and higher concentrations of catalyst poisons such as sulfur and phosphorus were detected. The sintering and poisoning resulted in less available active sites and hence lower activity for methane oxidation.
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