摘要
采用等体积浸渍法制备Ag/γ-Al2O3负载型催化剂,并考察了Ag负载量的变化对催化剂活性的影响;采用XRD,TPR,XPS和SEM等检测方法对催化剂结构进行分析,并与其催化性能进行关联.实验结果表明:在600～900℃内,不同负载量的Ag/γ-Al2O3催化剂催化活性差异不大,但在900～1100℃内,当负载量的质量分数为5%时,催化剂的活性增强;XRD和SEM结果表明,负载量质量分数为5%的催化剂Ag衍射峰较弱,表明负载的Ag物种很好地分散于载体上;TPR结果表明,负载量质量分数为5%的催化剂无氧化态的Ag存在,Ag仅以单质形式存在.
The influence of Ag loading on the activity of Ag/γ-Al2O3 catalyst with variable Ag loading prepared by equivalent volume impregnation method to catalyze the hydrogenation of coal slime was investigated. The structure of the catalyst was analyzed by XRD,TPR,XPS and SEM. Experiment shows that there is little difference in the catalytic activities of Ag/γ-Al2O3 with varying Ag loading in a range of 600~900 ℃. However,when Ag loading was 5%,the activity of Ag/γ-Al2O3 increased in a range of 900~1 100 ℃. The XRD and SEM analyses show that when Ag loading in Ag/γ-Al2O3 was 5%,the Ag loading species were well dispersed in the carrier. The investigations of H2-TPR show that the reduction peak of 5% Ag/γ-Al2O3 did not exist; the results indicate that 5% Ag/γ-Al2O3 has been completely reduced to elemental sliver.
出处
《吉林大学学报（理学版）》
CAS
CSCD
北大核心
2010年第6期1047-1051,共5页
Journal of Jilin University:Science Edition
基金
国家自然科学基金重大项目基金(批准号:90610014)
北京市教委重点学科项目(批准号:XX102900477)
关键词
煤泥水
热解
负载型催化剂
制氢
coal slime pyrolysis supported catalyst making hydrogen
