后处理方式对2,2'-二氯氢化偶氮苯合成用铂炭催化剂的影响  

Influence of post treatment methods on the properties of Pt/C catalysts for synthesis of 2,2'-dichlorohydrazobenzene

作　　者：曾利辉 曾永康 杨乔森 谭小艳 李岳锋 

机构地区：[1]西安凯立化工有限公司,陕西西安710016 [2]陕西省贵金属催化剂工程研究中心,陕西西安710016

出　　处：《工业催化》2013年第8期48-51,共4页Industrial Catalysis

摘　　要：对2,2'-二氯氢化偶氮苯合成用3%铂炭催化剂分别进行了热处理、微波处理和超声波处理。通过BET测试和SEM表征技术以及催化反应模拟对其性能进行检测与分析。结果表明,热处理导致金属粒子团聚,催化剂的比表面积减小,邻氯硝基苯催化加氢反应性能下降;微波和超声波处理促进了金属粒子的均匀分散,增大了催化剂的比表面积,提高了催化剂在邻氯硝基苯加氢反应中的催化性能。3% Pt/C catalysts for synthesis of 2,2＇-dichlorohydrazobenzene were treated by three ways of heat treatment,microwave treatment and ultrasonic treatment and were characterized by BET and SEM. The properties of as-prepared catalysts were investigated. The results showed that heat treatment resulted in the agglomeration of platinum particles, the decrease of specific surface area of Pt/C catalysts and the decline of the activity of the catalysts for catalytic hydrogenation of o-chloronitrobenzene ; Microwave and ultrasonic treatments promoted the uniform dispersion of platinum particles, increased specific surface area of the catalysts, and improved the activity of Pt/C catalysts for hydrogenation of o-chloronitrobenzene.

关 键 词：催化剂工程 铂炭催化剂 热处理 微波处理 超声波处理 2 2＇-二氯氢化偶氮苯合成 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]