摘要
为了改善流动法测定催化剂活性的实验,通过原位还原置换法将Ag负载于Raney-Cu表面,制备Ag/Raney-Cu催化剂,并比较了Ag/Raney-Cu与Raney-Cu及传统ZnO/Al_2O_3催化剂对甲醇分解反应的催化性能。研究发现所制备的Ag/Raney-Cu及Raney-Cu均显示了高于ZnO/Al_2O_3催化剂的低温催化活性。在250℃时,Raney-Cu的活性高于Ag/Raney-Cu;随着温度升高,Ag/Raney-Cu的活性显著增强,当温度升高至350℃,其活性高于Raney-Cu的活性。
To improve the catalyst activity measurements in the laboratory course,Raney-Cu and Ag / Raney-Cu,an Ag-modified Raney-Cu which was synthesized by the galvanic replacement method,were tested in the methanol decomposition reaction. Results showed that both Ag / Raney-Cu and Raney-Cu are more active than the conventional Zn O / Al_2O_3 catalyst for methanol decomposition at a large range of reaction temperatures,and Raney-Cu is more active at the lower temperature of 250 ℃. However,the catalytic activity of Ag / Raney-Cu increased remarkably with the increase of reaction temperature,and became more active than Raney-Cu at 350 ℃. This study suggests that both Raney-Cu and Ag / Raney-Cu are ideal low temperature catalysts for the catalytic activity measurements in the laboratory course.
出处
《大学化学》
CAS
2015年第6期63-66,共4页
University Chemistry
基金
山东大学教学实验室建设软件项目(No.sy2013207)
关键词
复相催化
低温活性
活性催化剂
Heterogeneous catalysis
Low temperature active
Catalytic activity measurement
