CeO_2掺杂对Cu/SiO_2催化剂热稳定性的影响  

Influences on the Thermostability of Cu/SiO_2 Catalysts Doping with CeO_2

作　　者：金方[1] 王琪[1,2,3] 陈亚中[1] 聂航[1] 崔鹏[1] 刘荣[4] 沈浩[4] 

机构地区：[1]合肥工业大学化工学院可控化学与材料化工安徽省重点实验室,安徽合肥230009 [2]合肥工业大学材料科学与工程博士后流动站,安徽合肥230009 [3]安徽六国化工股份有限公司博士后工作站,安徽铜陵244021 [4]安徽六国化工股份有限公司,安徽铜陵244021

出　　处：《安徽化工》2014年第5期24-26,30,共4页Anhui Chemical Industry

基　　金：国家自然科学基金(项目编号:21106027)

摘　　要：采用蒸氨法制备了CeO2掺杂的Cu/SiO2催化剂,考查了CeO2掺杂对Cu/SiO2催化剂在草酸二甲酯催化加氢制取乙二醇反应中热稳定性的影响。采用H2-程序升温还原(H2-TPR),透射电镜(TEM)对催化剂的物理化学性能进行了表征。在反应温度T=200℃,压力P=3.0 MPa,液时空速LHSV=0.4 h-1,氢气、草酸二甲酯摩尔比H2∶DMO=80∶1,400℃高温处理2.0 h的条件下测定了催化剂的活性变化。结果表明,CeO2掺杂对Cu物种的分散起到了促进作用,提高了催化剂的热稳定性。A series of Cu/SiO2 catalysts doping with CeO2 was prepared by ammonia evaporation method using SiO2 as support. The influences on the stability of the catalysts were investigated. The catalysts were characterized through H2-temperaure programmed reduction （H2-TPR）, and transmission electronic microscopy （TEM）. The catalytic activity measurement experiments were performed under working conditions of T=200℃, P=3.0 MPa, LHSV=0.4 h-1, molar ratio of hydrogen to DMO （H2∶DMO=80∶1） and under 400℃treatment. The results indicated that CeO2 had a positive effect on the dispersion of Cu which could improve the thermostability of Cu/SiO2 catalysts.

关 键 词：CU/SIO2催化剂 CeO2掺杂 热稳定性 

分 类 号：TQ032.4[化学工程]