Journal
CATALYSTS
Volume 13, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/catal13101381
Keywords
NH3-SCR; ZSM-5; catalyst; NOx removal
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This paper reviews the preparation methods, properties, and influencing factors of ZSM-5 catalysts in NH3-SCR, discusses the SCR performance of ZSM-5 catalysts doped with different metal ions, and summarizes the environmental adaptability of ZSM-5 catalysts and their development in denitrification.
Nitrogen oxides (NOx) are very common air pollutants that are harmful to the environment and human bodies. Selective catalytic reduction with ammonia (NH3-SCR) is considered an effective means to remove NOx emissions due to its good environmental adaptability, high catalytic activity, and remarkable selectivity. In this paper, the preparation methods, types, advantages, and challenges of ZSM-5 catalysts are reviewed. Special attention is paid to the catalytic properties and influence factors of ZSM-5 catalysts for NH3-SCR. The SCR performances of ZSM-5 catalysts doped with single or multiple metal ions are also reviewed. In addition, the environmental adaptabilities (sulfur resistance, alkali resistance, water resistance, and hydrothermal stability) of ZSM-5 catalysts are discussed, and the development of ZSM-5 catalysts in denitrification is summarized.
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