沉积沉淀法Pd基贵金属催化剂的制备及加氢性能研究  

Preparation of Pd-based Catalyst by Colloidal Precipitation Method and Its Performance in Hydrogenation

作　　者：袁洪晶 霍维涛 郝永超 梁慧锋 乔卫叶 Yuan Hongjing;Huo Weitao;Hao Yongchao;Liang Huifeng;Qiao Weiye(Xingtai University Chemistry and Chemical Engineering College,Xingtai 054001,China)

机构地区：[1]邢台学院化学与化工学院

出　　处：《山东化工》2019年第22期16-17,19,共3页Shandong Chemical Industry

基　　金：台市青年科技人才资助项目(2017ZZ027);河北省教育厅青年基金项目(QN2017519);邢台市青年科技人才资助项目(2017ZZ028);河北省自然科学基金项目(B2017108031)

摘　　要：以乙二醇为还原剂得到钯胶体后,通过沉积沉淀法制备了Pd/Al2O3催化剂。表征结果表明,该方法制备的Pd平均粒径为2.7 nm,远小于浸渍法制备的5nmPd粒径。将制备的Pd催化剂用于糠醛加氢反应,沉积沉淀法制备的Pd/Al2O3催化剂表现出了更好的催化性能,原因可以归于金属Pd的高分散性。In this paper,the noble metal palladium colloid was prepared by ethylene glycol reduction method,and the Pd/Al2O3 catalyst with a load of 1%was prepared by colloid precipitation with active alumina as the carrier.Meanwhile,Pd/Al2O3 catalyst was prepared by impregnation method for comparison.The particle size characterization indicated that the average particle size of the precious metal palladium colloid prepared by glycol reduction method was 2.7 nm and was in a highly dispersed state,which corresponded to the Pd diffraction peak in the XRD characterization.In the nitrogen adsorption characterization,the specific surface area of Pd/Al2O3 catalyst and the carrier activated alumina was not significantly different,indicating that the noble metal load did not destroy the pore structure of the carrier.The prepared catalyst was evaluated in the hydrogenation of furfural,and both showed good catalytic performance in the conversion of furfura.Among them,the activity of the catalyst prepared by colloidal precipitation method was lower than that prepared by impregnation method in the evaluation of the hydrogenation reaction of furfural because its loading capacity was less than 1%.

关 键 词：PD/AL2O3 钯胶体 糠醛 糠醇 

分 类 号：O643.36[理学—物理化学] TQ426[理学—化学]