The Challenges and Comprehensive Evolution of Cu-Based Zeolite Catalysts for SCR Systems in Diesel Vehicles: A Review

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Surveys from Asia Pub Date : 2022-12-02 DOI:10.1007/s10563-022-09384-6

Xiaotong Qi, Yanhua Wang, Caixia Liu, Qingling Liu

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引用次数: 3

Abstract

Nitrogen oxides (NO_x) are major contaminant causing environmental pollution in atmosphere. The most effective method for NO_x removal is ammonia selective catalytic reduction (NH₃-SCR), and catalysts play a crucial role. Cu-based zeolite catalysts are commonly used for the removal of NO_x from diesel engine exhaust, but the complex composition of diesel exhaust and the harsh operating environment of catalysts make zeolite catalysts susceptible to deactivation, thus limiting their practical application. This manuscript focuses on the negative effects of actual working conditions associated with diesel vehicle exhausts and analyses the influence of composition structure that Cu-based zeolite catalysts have on NH₃-SCR reaction, which refers mainly to the effects brought by topology, Si/Al ratio and Cu species. The strategies for developing Cu-based zeolite catalysts are summarized, and the current development bottlenecks such as improving catalytic performance, reducing synthesis cost and enhancing production efficiency are discussed, and the future research directions of Cu-based zeolite are prospected.

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柴油车SCR系统cu基沸石催化剂的挑战与综合发展综述

氮氧化物(NOx)是大气中造成环境污染的主要污染物。最有效的脱硝方法是氨选择性催化还原法(NH3-SCR)，其中催化剂起着至关重要的作用。铜基沸石催化剂通常用于去除柴油机尾气中的NOx，但柴油尾气的复杂成分和催化剂恶劣的工作环境使得沸石催化剂容易失活，从而限制了其实际应用。本文着重研究了实际工况对柴油车尾气的负面影响，分析了Cu基沸石催化剂的组成结构对NH3-SCR反应的影响，主要是拓扑结构、Si/Al比和Cu种类带来的影响。总结了cu基沸石催化剂的发展策略，讨论了目前cu基沸石催化剂在提高催化性能、降低合成成本、提高生产效率等方面的发展瓶颈，并对cu基沸石未来的研究方向进行了展望。

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来源期刊

Catalysis Surveys from Asia 化学-物理化学

CiteScore

4.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.