燃料化学学报2015，Vol.43Issue(12)：1504-1509,6.
NaCl与Hg0对V2O5-WO3/TiO2 SCR脱硝催化剂的协同作用研究
Synergy of NaCl and Hg0 on V2 O5-WO3/TiO2 SCR catalysts
摘要
Abstract
The nano V2 O5-WO3/TiO2 catalysts were prepared. NaCl was loaded on the catalysts by impregnation and Hg0 was loaded by adsorption. The samples were characterized by XRD, SEM, BET, NH3-TPD and FT-IR measurements to investigate the effect of NaCl and Hg0 on the performance of V2 O5-WO3/TiO2 SCR catalysts. Besides, the functional mechanism was proposed combining with previous conclusions. The results indicate that NaCl causes the agglomeration of catalysts, leading to the decrease of BET surface area. For NaCl poisoning catalysts, the deactivation is observed obviously with the increase of NaCl loadings. Br准nsted acid sites (-V-OH) are neutralized by Na to ultimately form -V-O-Na and Cl-V-O-Na, resulting in the decline of catalytic activity. Hg0 shows no influence on the microstructure and phase composition of the catalysts. However, it can be adsorbed on the V active sites to weaken the De-NOx activities slightly. When NaCl and Hg0 exist simultaneously, Hg0 will combine with Cl that is introduced from NaCl to form HgCl or HgCl2 and partly replace Na, and -V-O…Hg or-V-O-Hg-Cl is produced finally.关键词
协同作用/V2O5-WO3/TiO2催化剂/NaCl/Hg0/失活Key words
synergy/V2 O5-WO3/TiO2 catalyst/NaCl/Hg0/deactivation分类
资源环境引用本文复制引用
孔明,刘清才,赵冬,任山,孟飞..NaCl与Hg0对V2O5-WO3/TiO2 SCR脱硝催化剂的协同作用研究[J].燃料化学学报,2015,43(12):1504-1509,6.基金项目
The project was supported by the National Natural Science Foundation of China (51274263,51204220) and Natural Science Foundation of Chongqing (cstc2013jjB0035). 国家自然科学基金(51274263, 51204220)和重庆市自然科学基金(cstc2013jjB0035)资助项目 （51274263,51204220）
