天然气化工2018，Vol.43Issue(1)：40-46,7.
载体对同晶取代法制备Cu/ZnO催化剂结构及催化性能的影响
Effect of supports on structure and performance of Cu/ZnO catalysts from isomorphous substitution method
摘要
Abstract
Rosasite, (Cu,Zn)2CO3(OH)2, the highly effective precursor phase of Cu/ZnO catalyst for methanol synthesis from syngas,can be prepared by isomorphous substitution.During preparation process,high surface supports AC,Al2O3,SBA-15, MCM-41 and SiO2have been used to modify the performance of catalysts for methanol synthesis from syngas. The XRD, AAS, BET, H2-TPR and TEM characterizations have been employed to explore the effect of supports on the structure and performance of catalysts. The experimental results indicate that although the Zn/(Cu+Zn) mass ratio in supported catalysts is similar to that in the unsupported CuO-ZnO catalyst,the active sites of Cu-Zn interaction in supported catalysts decrease due to some Zn(NO3)2being impregnated in the pores of the supports which couldn't form (Cu,Zn)2CO3(OH)2, resulting in lower catalytic activity than that of unsupported CuO-ZnO catalyst. The CuO-ZnO/SBA-15 has the largest amount of Cu substituted by Zn, the smallest Cu particle size of 12.8 nm and good dispersibility. The space-time yield of methanol could reach 176.2g/(kgcu·h) for CuO-ZnO/SBA-15, but it is still lower than 256.0g/(kgcu·h)for CuO-ZnO.关键词
载体/同晶取代/锌孔雀石/铜基催化剂/甲醇/合成气Key words
support/isomorphous substitution/rosasite/Cu-based catalyst/methanol/syngas分类
化学工程引用本文复制引用
韩林毅,王立平,李忠,郑华艳..载体对同晶取代法制备Cu/ZnO催化剂结构及催化性能的影响[J].天然气化工,2018,43(1):40-46,7.基金项目
国家自然科学基金(21576179) （21576179）
