燃料化学学报（中英文）2024，Vol.52Issue(1)：65-75,11.DOI:10.1016/S1872-5813(23)60369-X
不同孔结构CeTiOx催化剂的制备及其NH3-SCR脱硝性能研究
Preparation and NH3-SCR catalytic performance of CeTiOx catalysts with different pore structures
摘要
Abstract
To investigate the influence of pore structure on the catalytic activity of catalysts,four catalysts including three-dimensionally ordered macroporous-mesoporous(3DOM-m)CeTiOx,three-dimensionally ordered macroporous(3DOM)CeTiOx,three-dimensionally ordered mesoporous(3DOm)CeTiOx and disordered mesoporous(DM)CeTiOx were synthesized by the sol-gel method.The NH3-SCR denitration testing results show that the performance of the catalysts with different pore structures follows the sequence of 3DOM-m CeTiOx＞3DOm CeTiOx＞3DOM CeTiOx＞DM CeTiOx,and the 3DOM-m CeTiOx shows an excellent catalytic activity,with more than 90％ NO conversion in the range of 250-400 ℃ at a GHSV of 60000 h-1.The characterization of catalysts by XRD,SEM,BET,NH3-TPD and in-situ DRIFTS indicates that the surface area is not the dominant factor determining the catalytic activity of CeTiOx.3DOM-m CeTiOx has a highly ordered macroporous-mesoporous structure and abundant Bronsted acidic sites,thereby improving the denitrification activity.The NH3-SCR reaction over the 3DOM-m CeTiOx mainly follows the L-H and E-R mechanisms.关键词
CeTiOx/三维有序大孔/有序介孔/NH3-SCR脱硝Key words
CeTiOx/3DOM structure/ordered mesoporous structure/NH3-SCR分类
化学化工引用本文复制引用
谭晨晨,韩宇轩,胡亚琴,沈凯,丁世鹏,张亚平..不同孔结构CeTiOx催化剂的制备及其NH3-SCR脱硝性能研究[J].燃料化学学报（中英文）,2024,52(1):65-75,11.基金项目
The project was supported by National Key Research and Development Program of China(2021YFB3500604).国家重点研发计划(2021YFB3500604)项目资助 （2021YFB3500604）
