化工进展2024，Vol.43Issue(6)：3093-3099,7.DOI:10.16085/j.issn.1000-6613.2023-0746
CuCe-SAPO-34选择性催化丙烯还原柴油车尾气氮氧化物
Selective catalytic reduction of nitric oxide with propylene over CuCe-SAPO-34 catalysts under diesel engine exhaust
摘要
Abstract
CuCe-SAPO-44 zeolite catalysts were prepared by incipient wet impregnation method,and their activities of selective catalytic reduction of nitric oxide with propylene(C3H6-SCR)were investigated under lean burning condition.These catalysts were characterized by X-ray diffraction(XRD),N2 adsorption-desorption,UV-vis spectroscopy(UV-Vis),H2 temperature-programmed reduction(H2-TPR)and NH3 temperature-programmed desorption(NH3-TPD).The results had shown that the interaction between the introduced cerium and copper species was beneficial for generating more isolated Cu2+species which improved the low-temperature redox performance of the CuCe-SAPO-34 zeolite catalysts,and thus enhanced the low-temperature SCR activity.There were abundant Lewis acid sites on the skeleton of the bimetallic zeolite catalysts,which were favorable for the adsorption and activation of NOx and C3H6.When Cu∶Ce=4∶2,CuCe-SAPO-34 exhibited the best de-NOx activity with a conversion of NOx more than at 90%when the diesel engine exhaust contained 10%O2 and 5%H2O at 250℃.关键词
分子筛催化剂/铈/选择催化还原/氮氧化物/丙烯Key words
zeolite catalysts/cerium/selective catalytic reduction/nitrogen oxide/propylene分类
资源环境引用本文复制引用
周皞,王旭瑞,赵辉爽,温妮妮,苏亚欣..CuCe-SAPO-34选择性催化丙烯还原柴油车尾气氮氧化物[J].化工进展,2024,43(6):3093-3099,7.基金项目
国家自然科学基金(52276103) （52276103）
江苏省高等学校优秀科技创新团队项目(2019). （2019）
