锰基催化剂在一氧化碳选择性还原氮氧化物中的应用:现状、现有挑战和未来展望

Catalysts Pub Date : 2024-07-18 DOI:10.3390/catal14070462
Dianxing Lian, Mohaoyang Chen, Huanli Wang, Chenxi Li, Botao Liu, Guiyao Dai, Shujun Hou, Yuxi Liu, Yongjun Ji
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摘要

一氧化碳选择性催化还原氮氧化物(CO-SCR)技术能够同时消除工业烟气和汽车尾气中的一氧化碳和氮氧化物,因此是一种很有前途的脱硝方法。开发具有成本效益和高性能的催化剂对于该技术的商业化至关重要。与其他过渡金属催化剂相比,锰基催化剂在低温低氧条件下的催化效率更高,这表明其在实际应用中具有巨大潜力。本综述概述了各种锰基催化剂,包括块状或支撑的氧化锰催化剂、块状或支撑的锰基复合氧化物催化剂以及氧化锰作为掺杂剂的使用。随后介绍了锰基催化剂的合成方法和催化机理。下一节探讨了 O2、H2O 和 SO2 对催化性能的影响。最后,讨论了该反应的潜力和影响。本研究旨在为工业应用中 CO-SCR 反应中高效锰基催化剂的合理设计提供理论指导。
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Mn-Based Catalysts in the Selective Reduction of NOx with CO: Current Status, Existing Challenges, and Future Perspectives
The technology for the selective catalytic reduction of NOx by CO (CO-SCR) has the capability to simultaneously eliminate CO and NOx from industrial flue gas and automobile exhaust, thus making it a promising denitrification method. The advancement of cost-effective and high-performing catalysts is crucial for the commercialization of this technology. Mn-based catalysts demonstrate enhanced catalytic efficiency under conditions of low temperature and low oxygen content when compared to other transition metal-based catalysts, indicating significant potential for practical applications. This review outlines the diverse Mn-based catalysts, including bulk or supported MnOx catalysts, bulk or supported Mn-based composite oxide catalysts, and the use of MnOx as dopants. Subsequently, the synthesis methods and catalytic mechanism employed by Mn-based catalysts are presented. The following section examines the impact of O2, H2O, and SO2 on the catalytic performance. Finally, the potential and implications of this reaction are deliberated. This work aims to offer theoretical guidance for the rational design of highly efficient Mn-based catalysts in the CO-SCR reaction for industrial applications.
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