烟气NO_x低温选择性催化还原催化剂研究进展

Review of catalysts for low-temperature SCR of NO_x

催化剂是选择性催化还原(SCR)脱硝技术的核心,其催化性能直接关系到脱硝效果的好坏。近年来,由于低温选择性催化还原法具有良好的经济性,引起各国环保研究工作者的关注,成为近年SCR研究的热点。本文概述了贵金属、金属氧化物、分子筛和碳基材料催化剂的低温(低于250℃)选择性催化还原法脱除NOx研究进展。其中,以碳基材料为载体的催化剂显示出良好的低温选择性和稳定性,具有很好的应用前景。

Catalyst is the key to the selective catalytic reduction （SCR） of NOx, and its properties are directly related to the effect of NOx removal. In the last decade, low temperature SCR has received much attention due to its economics. This review summarizes th research status in the low temperature SCR catalyst, including noble metals, metal oxides, zeolites and carbon materials catalysts. The carbon materials catalysts demonstrate good activity and stability at low temperature, and have abetter application prospect.