CO_2氧化丙烷脱氢制丙烯Pd-Cu/MoO_3-SiO_2催化剂研究  

Study of Propane Oxiditive Dehydrogenation to Propene with Carbon Dioxide on Pd-Cu/MoO_3-SiO_2 Catalyst

作　　者：郭俊宝[1] 钟顺和[1] 邵怀启[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《天然气化工—C1化学与化工》2003年第5期1-5,9,共6页Natural Gas Chemical Industry

基　　金：国家自然科学基金资助项目 (2 0 0 760 3 5)

摘　　要：以MoO3 SiO2复合物作载体,采用等体积浸渍法制得了Pd Cu催化剂,采用BET、TPR、IR对催化剂结构及CO2、C3H8在催化剂上的吸附位、吸附态进行了分析。实验结果证明,CO2在催化剂上存在卧式吸附态,丙烷以亚甲基和其中一个甲基上的氢吸附在Mo=O双键的端基氧上。在微型反应装置上测试了催化剂在CO2氧化丙烷脱氢制丙烯反应中的催化性能,常压和600℃条件下,C3H8转化率达26 94%,C3H6选择性达78 34%。通过催化剂的物化性质、化学吸附性质与反应性能的关联,讨论了反应机理和影响催化剂性能的基本因素。MoO3SiO2 (MoSiO) surface complex supports were prepared by surface modification PdCu bimetallic catalysts were prepared by incipient impregnation BET, TPR and IR techniques have been used to investigate the structure of catalysts and chemisorption states of CO2 and C3H8 Horizontal type chemisorption of CO2 is found; C3H8 is chemisorbed on terminal O of Mo=O bond through H of methylene and one of methyl The catalysts were tested in the reaction of oxidative dehydrogenation of propane with carbon dioxide to propene in a microreactor In the condition of ambient pressure and 600℃, the conversion of propane was 2694%, and the selectivity of propene was 7834% By relating the physical and chemical characters of catalysts with their performance in reaction, a reaction mechanism was proposed and the factors which influence the activity of the catalysts were also studied

关 键 词：丙烷 CO2 氧化脱氢 MoO3-SiO2载体 Pd-Cu催化剂 

分 类 号：TQ221[化学工程—有机化工]