摘要
柴油车尾气中的氮氧化物日益危及人类健康和生态环境。Cu-SSZ-13分子筛脱硝催化剂因宽的温度窗口、优异的水热稳定性等性能而受到广泛关注。为了适应更为严格的氮氧化物排放标准,进一步提高Cu-SSZ-13分子筛催化剂的NH_3-SCR反应性能,深入研究Cu-SSZ-13分子筛催化剂物理化学性能及其对NH_3-SCR脱硝反应机理影响十分必要。介绍了近年来Cu-SSZ-13分子筛催化剂及其NH_3-SCR脱硝机理的研究进展。详细论述了Cu-SSZ-13分子筛催化剂在NH_3-SCR反应过程中的活性铜物种及其变化,并对不同Cu-SSZ-13分子筛催化剂的制备方法进行了比较。提出Cu-SSZ-13分子筛催化剂NH_3-SCR脱硝技术研究中SO_2气氛和理论与实验的结合需要进一步研究。
Nitrogen oxides（ NOx ） in the exhaust gas from diesel vehicles are increasingly threatening human health and ecological environment.Due to its wide temperature window,excellent hydrothermal stability and other performances,Cu-SSZ-13 molecular sieve catalyst for removal of NOx is attracting more attentions. In order to meet the legislative emission requirements for NOx -containing exhaust gases and improve the NH3 selective catalytic reduction（ NH3-SCR）reactive performances of Cu-SSZ-13 molecular sieve catalyst,it is necessary to study deeply the physicochemical properties of Cu-SSZ-13 catalyst and their influences on the reaction mechanism of NH3-SCR.This paper summarizes the recent research progress in Cu-SSZ-13 catalyst and its NH3-SCR reaction mechanism.This paper also describes in detail the changes of Cu active species of Cu-SSZ-13 catalyst in the reaction and compares the different preparation methods of Cu-SSZ-13 catalyst.The problems and suggestions in the study of Cu-SSZ-13 catalyst for removal of NOx with NH3-SCR technology are put forward.
出处
《现代化工》
CAS
CSCD
北大核心
2017年第9期34-39,共6页
Modern Chemical Industry
基金
国家自然科学基金项目(21476154)
山西省回国留学人员科研资助项目(2015-038)
