钙钛矿催化剂用于氨选择性还原氮氧化物的研究进展

Perovskite catalysts for selective catalytic reduction of NOx with NH3

氨选择性催化还原氮氧化物(NOx)技术是目前应用较为广泛的催化脱硝技术,钙钛矿材料因其独特的结构、良好的稳定性且环保无害的特点成为选择性催化还原NOx领域的研究热点。本文综述了近年来国内外关于钙钛矿NH3-SCR催化剂的研究进展,较为全面地对钙钛矿催化剂的主要类型、脱硝活性、构效关系进行了论述,同时介绍了钙钛矿在光辅助SCR技术这一全新领域的研究进展,并总结了钙钛矿催化剂的NH3-SCR反应机制,对该领域未来可能的发展方向和研究目标进行了展望。

Ammonia selective catalytic reduction of nitrogen oxides(NOx)technology with V2O5-WO3(MoO3)/TiO2 as the core catalyst is currently widely used.But it has many problems such as narrow and high-temperature window,easy to poison by alkali inactivation,vanadium's biological toxicity and secondary pollution to the environment,which require researchers to develop new efficient and environmentally friendly catalyst systems.Due to their unique structure,good stability and environmentally friendly characteristics,perovskite materials have become a research hotspot in the field of selective catalytic reduction of NOx.We reviewd the research progress of perovskite NH3-SCR catalysts at home and abroad in recent years,and comprehensively discussed the main types,denitrification activity and structure-activity relationship of perovskite catalysts.At the same time,the research progress of perovskite in the new field of photo photo-assisted SCR technology was introduced.In addition,we summarized the research on the NH3-SCR reaction mechanism of perovskite catalysts,and prospectd the possible future development directions and research goals of this field.