金属氧化物催化CO还原NO的研究进展

一氧化碳（CO）广泛存在于烧结/球团/焦化烟气或汽车尾气中，应用CO-选择性催化还原（SCR）技术同时脱除烟气中CO和NO是烟气治理的理想方案之一。目前，在NO-CO反应研究中较多的是贵金属催化剂，但由于其价格昂贵、高温失活、易中毒等问题难以在工业中实现应用。本文将近几年来金属氧化物催化CO还原NO的研究成果进行了系统的梳理与总结，重点介绍Fe基、Ce基、Co基、Cu基这4种金属氧化物催化剂的研究进展，分析催化剂的制备方法、掺杂助剂种类和比例、NO-CO反应条件等因素与催化活性之间的关系，总结催化剂抗水抗硫性能及可能的CO-SCR反应机理，并探讨O₂存在的条件下对催化剂活性的影响，为提高金属氧化物催化剂抗氧性研究提供理论参考。

Research progress on NO reduction by CO over metal oxide catalysts

Carbon monoxide as one of the potential reducing agents for removing nitrogen oxides, is widely present in sintering, pellet, coking flue gas and automobile exhaust. The application of CO-SCR technology to simultaneously remove CO and NO is one of the ideal scheme for flue gas treatment. At present, the catalysts studied in the NO-CO reaction are noble metal catalysts, but they are difficult to apply in industry due to their high price, high temperature deactivation and poisoning. In this paper, the recent researches of NO reduction by CO over metal oxide catalysts are systematically reviewed and summarized. The research progress of preparation methods, doping modification and reaction conditions of Fe based, Ce based, Co based and Cu based catalysts are analyzed, and the capability of water and sulfur resistance have been investigated. Analyzing the mechanism of CO-SCR reaction, and researching the influence of the presence of O₂, which are evaluated on the NO reduction performance of the catalysts, in order to providing theoretical reference for the study of metal oxide catalysts.