Facile preparation of Fe-Beta zeolite-supported transition metal oxide catalysts and their catalytic performance for the simultaneous removal of NOx and soot

doi:10.1016/j.cjche.2024.07.016

Chinese Journal of Chemical Engineering ›› 2024, Vol. 76 ›› Issue (12): 10-20.DOI: 10.1016/j.cjche.2024.07.016

Facile preparation of Fe-Beta zeolite-supported transition metal oxide catalysts and their catalytic performance for the simultaneous removal of NO_x and soot

Xinyu Chen¹, Shengran Zhou¹, Lanyi Wang¹, Chunlei Zhang², Siyu Gao¹, Di Yu², Ying Cheng³, Xiaoqiang Fan¹, Xuehua Yu¹, Zhen Zhao^1,2

1. Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China;
2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China;
3. Department of Environmental Engineering, Hebei University of Environmental Engineering, Qinhuangdao 066102, China

Received:2024-07-01 Revised:2024-07-19 Accepted:2024-07-23 Online:2024-08-28 Published:2024-12-28
Contact: Xuehua Yu,E-mail:yuxuehua1986@163.com;Zhen Zhao,E-mail:zhenzhao@cup.edu.cn
Supported by:
This work was supported by National Natural Science Foundation of China (22372107, 22072095, 22202058); Postgraduate Education Reform Project of Liaoning Province (LNYJG2022400, LNYJG2023280); National Key Research and Development Program of China (2022YFB3506200, 2022YFB3504100); Excellent Youth Science Foundation of Liaoning Province (2022-YQ-20); Shenyang Science and Technology Planning Project (22-322-3-28); Liaoning Xingliao talented youth Top talent program (XLYC2203007).

Facile preparation of Fe-Beta zeolite-supported transition metal oxide catalysts and their catalytic performance for the simultaneous removal of NO_x and soot

Xinyu Chen¹, Shengran Zhou¹, Lanyi Wang¹, Chunlei Zhang², Siyu Gao¹, Di Yu², Ying Cheng³, Xiaoqiang Fan¹, Xuehua Yu¹, Zhen Zhao^1,2

1. Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China;
2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China;
3. Department of Environmental Engineering, Hebei University of Environmental Engineering, Qinhuangdao 066102, China

通讯作者: Xuehua Yu,E-mail:yuxuehua1986@163.com;Zhen Zhao,E-mail:zhenzhao@cup.edu.cn
基金资助:
This work was supported by National Natural Science Foundation of China (22372107, 22072095, 22202058); Postgraduate Education Reform Project of Liaoning Province (LNYJG2022400, LNYJG2023280); National Key Research and Development Program of China (2022YFB3506200, 2022YFB3504100); Excellent Youth Science Foundation of Liaoning Province (2022-YQ-20); Shenyang Science and Technology Planning Project (22-322-3-28); Liaoning Xingliao talented youth Top talent program (XLYC2203007).

Abstract

Abstract: Diesel engine exhaust comprises nitrogen oxides (NO_x) and soot particles, which cause serious air pollution. However, owing to the contradictory nature of NO_x reduction and soot oxidation, a trade-off exists in the simultaneous removal of NO_x and soot. Consequently, catalytic technology has become a hot research topic. This study prepared MO_δ/Fe-Beta (M = Fe, Co, Ni, Mn, Cu) catalysts through incipient wetness impregnation using Fe-Beta as the support and explored the catalytic performance of the above catalysts. The results exhibited the good performance of the prepared catalysts. The introduction of Mn resulted in a lower peak temperature of soot combustion for the catalyst, and slightly decreased deNO_x performance of Fe-Beta. The soot combustion temperature was as low as 422 ℃, and the temperature window for 80% NO conversion was 164-423 ℃. The interaction between MnO_δ and zeolite can regulate the acid sites and produce sufficient active oxygen species for the catalyst. The catalytic activity of the MnO_δ/Fe-Beta catalyst is due to its strong redox property, the appropriate number of acid sites, and sufficient number of active oxygen species. In addition, the catalyst had good stability and water and sulfur resistance, therefore it had great potential for future application in the simultaneous removal of NO_x and soot from diesel engine exhaust.

Key words: Fe-Beta, Transition metal oxides, Catalysts, Simultaneous removal of NO_x and soot

摘要： Diesel engine exhaust comprises nitrogen oxides (NO_x) and soot particles, which cause serious air pollution. However, owing to the contradictory nature of NO_x reduction and soot oxidation, a trade-off exists in the simultaneous removal of NO_x and soot. Consequently, catalytic technology has become a hot research topic. This study prepared MO_δ/Fe-Beta (M = Fe, Co, Ni, Mn, Cu) catalysts through incipient wetness impregnation using Fe-Beta as the support and explored the catalytic performance of the above catalysts. The results exhibited the good performance of the prepared catalysts. The introduction of Mn resulted in a lower peak temperature of soot combustion for the catalyst, and slightly decreased deNO_x performance of Fe-Beta. The soot combustion temperature was as low as 422 ℃, and the temperature window for 80% NO conversion was 164-423 ℃. The interaction between MnO_δ and zeolite can regulate the acid sites and produce sufficient active oxygen species for the catalyst. The catalytic activity of the MnO_δ/Fe-Beta catalyst is due to its strong redox property, the appropriate number of acid sites, and sufficient number of active oxygen species. In addition, the catalyst had good stability and water and sulfur resistance, therefore it had great potential for future application in the simultaneous removal of NO_x and soot from diesel engine exhaust.

关键词: Fe-Beta, Transition metal oxides, Catalysts, Simultaneous removal of NO_x and soot

Xinyu Chen, Shengran Zhou, Lanyi Wang, Chunlei Zhang, Siyu Gao, Di Yu, Ying Cheng, Xiaoqiang Fan, Xuehua Yu, Zhen Zhao. Facile preparation of Fe-Beta zeolite-supported transition metal oxide catalysts and their catalytic performance for the simultaneous removal of NO_x and soot[J]. Chinese Journal of Chemical Engineering, 2024, 76(12): 10-20.

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Facile preparation of Fe-Beta zeolite-supported transition metal oxide catalysts and their catalytic performance for the simultaneous removal of NO_x and soot

Facile preparation of Fe-Beta zeolite-supported transition metal oxide catalysts and their catalytic performance for the simultaneous removal of NO_x and soot

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