毕赤酵母还原制备Ag/ZrO_2催化剂及其催化1,2-丙二醇选择氧化反应研究  

Preparation of Ag/ZrO_2 Catalyst with Microorganism-mediated Biosynthesis method by using Pichia Pastoris for selective oxidation of 1,2-propanediol

作　　者：景孝廉[1] 王慧[1] 陈慧梅[1] 黄加乐[1] 孙道华[1] 李清彪[1,2] 

机构地区：[1]厦门大学化学化工学院化学工程与生物工程系,福建厦门361005 [2]泉州师范学院化学与生命科学学院,福建泉州362000

出　　处：《贵金属》2014年第A01期131-136,共6页Precious Metals

基　　金：稀贵金属综合利用新技术国家重点实验室开放课题(SKL-SMP-201210)

摘　　要：将微生物还原法制备银纳米颗粒的技术引入到催化剂的制备当中,以毕赤酵母菌体干粉作为还原剂制备纳米银粉,采用溶胶负载法将银负载获得Ag/ZrO2催化剂,利用TEM、XRD、UV-Vis DRS等方法对催化剂进行了表征,并将所制备的催化剂用于1,2-丙二醇选择氧化制备丙酮醛的反应中。研究表明,在1,2-丙二醇的空速为5.2 h-1,反应温度340℃时,450℃下焙烧的银负载量为8%的Ag/ZrO2催化剂获得了最佳的催化反应性能,1,2-丙二醇的转化率达到96.8%,丙酮醛的选择性达到78.3%。Ag/ZrO2 catalysts for the selective oxidation of 1,2-propanediol to methylglyoxal with molecular oxygen were prepared by an immobilization method based on the microorganism-mediated biosynthesis process with Pichia pastoris. The catalyst was characterized by XRD, TEM, UV-Vis DRS and TG techniques. The effects of reaction conditions（temperature and space velocity）, Ag loading amount and calcination temperature of the as-produced Ag/ZrO2 catalysts on the catalytic performance were investigated. And the results showed that the 8% Ag/ZrO2 catalyst calcined at 450℃ exhibited the best catalytic activity with 96.8% 1,2-propanediol conversion and 78.3% methylglyoxal selectivity.

关 键 词：催化化学 微生物还原 银催化剂 1 2-丙二醇 毕赤酵母 

分 类 号：O643.36[理学—物理化学]