Pretreatment techniques in CO-SCR and NH3-SCR: Status, challenges, and perspectives

IF 6.5 1区化学 Q2 CHEMISTRY, PHYSICAL Journal of Catalysis Pub Date : 2025-02-01 DOI:10.1016/j.jcat.2024.115925

Guiyao Dai , Botao Liu , Ruijing Wang , Huanli Wang , Yaxin Miao , Shujun Hou , Dianxing Lian , Mohaoyang Chen , Chenxi Li , Zhijin Zhang , Bushi Dang , Jingchun Liu , Weiwei Zhang , Ke Wu , Honggen Peng , Guofeng Zhao , Yuxi Liu , Yongjun Ji

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Abstract

The selective catalytic reduction (SCR) of NO_x, utilizing carbon monoxide (CO) and ammonia (NH₃), is recognized as an effective approach for NO_x abatement. During the SCR process, the appropriate pretreatment of catalysts can significantly enhance their surface and interfacial structures, thereby improving their activity, selectivity, and stability. This review begins with the reaction mechanisms of CO-SCR and NH₃-SCR, followed by an introduction to various pretreatment strategies that can enhance the performance of catalysts employed in these two reactions. An in-depth discussion is provided regarding how different pretreatment methods influence the active structure of catalysts, the key steps of the reactions, and the overall catalytic performance. Subsequently, a comparative analysis of the pretreatment strategies employed for both reactions is presented, highlighting their similarities and differences, thereby elucidating the essence of pretreatment techniques. Lastly, the paper identifies the current challenges encountered in the field of pretreatment and proposes potential directions for future development. This work aims to offer theoretical insights that may inspire innovative pretreatment strategies in CO-SCR and NH₃-SCR among researchers and engineers.

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CO-SCR和NH3-SCR的预处理技术：现状、挑战和展望

利用一氧化碳（CO）和氨（NH3）对NOx进行选择性催化还原（SCR）是公认的一种有效的NOx减排方法。在SCR过程中，对催化剂进行适当的预处理可以显著增强催化剂的表面和界面结构，从而提高催化剂的活性、选择性和稳定性。本文首先介绍了CO-SCR和NH3-SCR的反应机理，然后介绍了用于这两个反应的各种预处理策略，以提高催化剂的性能。深入讨论了不同的预处理方法对催化剂活性结构、反应关键步骤和整体催化性能的影响。随后，对两种反应采用的预处理策略进行了比较分析，突出了它们的异同，从而阐明了预处理技术的本质。最后，本文指出了目前预处理领域面临的挑战，并提出了未来发展的潜在方向。本研究旨在为研究人员和工程师提供CO-SCR和NH3-SCR的创新预处理策略提供理论见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Catalysis 工程技术-工程：化工

CiteScore

12.30

自引率

5.50%

发文量

447

审稿时长

31 days

期刊介绍： The Journal of Catalysis publishes scholarly articles on both heterogeneous and homogeneous catalysis, covering a wide range of chemical transformations. These include various types of catalysis, such as those mediated by photons, plasmons, and electrons. The focus of the studies is to understand the relationship between catalytic function and the underlying chemical properties of surfaces and metal complexes. The articles in the journal offer innovative concepts and explore the synthesis and kinetics of inorganic solids and homogeneous complexes. Furthermore, they discuss spectroscopic techniques for characterizing catalysts, investigate the interaction of probes and reacting species with catalysts, and employ theoretical methods. The research presented in the journal should have direct relevance to the field of catalytic processes, addressing either fundamental aspects or applications of catalysis.