期刊
ENERGY & FUELS
卷 35, 期 8, 页码 6443-6464出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.1c00330
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This paper summarizes the methods for reducing NO emissions in China, discusses the research status and issues of different de-NOx methods, with a focus on the direct catalytic decomposition method and the research progress of six major catalysts used in this method. Detailed research on Cu-ZSM-5 is conducted due to its high activity and O-2 tolerance, and future research directions for NO decomposition are discussed.
China is the country with the most coal-power generation and the most diesel vehicles in the world; it is of great significance to research the reduction of NO emissions. This paper summarizes five de-NOx methods, including adsorption, storage reduction, selective catalytic reduction, selective non-catalytic reduction, and direct catalytic decomposition, and explores the current research state and problems existing in actual application of each method. The direct catalytic decomposition method is focused especially, and research progresses of six major catalysts used in this method are summarized, including noble metals, metal oxides, perovskite-type composite oxide, hydrotalcite materials, heteropoly acid, and Cu-ZSM-5. The activity and O-2 tolerance of each catalyst are compared, and future research directions are given. Cu-ZSM-5 is studied in detail as a result of its high activity and O-2 tolerance and reviewed from three aspects, including the influence of preparation and reaction conditions on activity, the mechanism of catalytic decomposition, and doping modification. Finally, the future research directions of NO decomposition are discussed.
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