甘油氢解制低级醇用PtPdNi/TiV_xAlO_y催化剂的研究  

PtPdNi/TiV_xAlO_y Catalyst for Glycerol Hydrogenolysis to Lower Alcohols

作　　者：郭燕[1] 徐成华[1] 曹云进[1] 刘川琦[1] 刘建英[1] 

机构地区：[1]成都信息工程学院大气环境模拟与污染控制四川省高校重点实验室,四川成都610225

出　　处：《石油化工》2012年第3期295-301,共7页Petrochemical Technology

基　　金：四川省教育厅青年基金项目(2006C032);成都信息工程学院发展基金项目(KYTZ20060902)

摘　　要：分别采用分步浸渍法和共浸渍法制备了PtPdNi/TiVxAlOy催化剂,并考察了该催化剂在甘油氢解反应中的催化性能;采用XRD、H2-TPR、H2-O2滴定和NH3-TPD等手段对PtPdNi/TiVxAlOy催化剂和TiVxAlOy载体进行了表征。实验结果表明,采用分步浸渍法制备催化剂以及在载体中引入适量V均有利于提高Pt和Pd在载体表面的分散度,从而提高催化剂在甘油氢解反应中的催化性能;高度分散的Pt和Pd是催化剂的主催化活性中心,Ni起助催化作用,可抑制Pt和Pd与载体之间的相互作用,有利于Pt和Pd在载体表面分散;引入适量V可提高TiVxAlOy载体的酸强度,载体表面适量强酸位的存在有利用于低级醇的生成。PtPdNi/TiVxAlOy catalysts were prepared by co-impregnation or two-step impregnation. Their catalytic performances in glycerol hydrogenolysis were studied. The PtPdNi/TiVxAlOy catalysts and TiVxAlOy supporters were characterized by means of XRD, H2-TPR, H2-O2 titration and NH3-which could weaken the mutual action between Pt and Pd to heighten the dispersity of Pt and Pd on the supports. Adding appropriate amount of V could increase the acid strength of the supports, which was beneficial to production of lower alcohols in glycerol hydrogenolysis.

关 键 词：甘油 催化氢解 浸渍法 低级醇 生物柴油 

分 类 号：TQ032.41[化学工程]