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[1]刘少文,涂文艳,管卓龙,等.Pd/γAl2O3堇青石结构化催化剂制备及性能[J].武汉工程大学学报,2011,(12):1-5.
　LIU Shao wen,TU Wen yan,GUAN Zuo long,et al.Investigation for preparation and property of Pd/γAl2O3Cordieritestructured catalysts[J].Journal of Wuhan Institute of Technology,2011,(12):1-5.
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Pd/γAl2O3堇青石结构化催化剂制备及性能(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2011年12期
页码:
1-5
栏目:
化学与化学工程
出版日期:
2011-12-30

文章信息/Info

Title:
Investigation for preparation and property of Pd/γAl2O3Cordierite
structured catalysts
文章编号:
16742869(2011)12000105
作者:
刘少文1; 2; 涂文艳1; 管卓龙1; 包传平1
1.武汉工程大学化工与制药学院，绿色化工过程教育部重点实验室，湖北 武汉 430074;
2.黄冈师范学院化工学院，湖北 黄冈 438000
Author(s):
LIU Shaowen1; 2; TU Wenyan1; GUAN Zuolong1; BAO Chuanping1
1.Key Laboratory for Green Chemical Process of Ministry of Education,School of Chemical Engineering & Pharmacy,
Wuhan Institute of Technology,Wuhan 430074,China;
2.College of Chemical Engineering,Huanggang Normal University,Huanggang 438000,China
关键词:
结构化催化剂; 催化加氢; 间苯二胺; TEM; XPS
Keywords:
structured catalyst; catalytic hydrogenation; mdinitrobenzene; TEM; XPS
分类号:
O643
DOI:
-
文献标志码:
AAdoi:10.3969/j.issn.16742869.2011.12.001
摘要:
采用悬浮液涂层法对结构化堇青石载体进行修饰，然后采用浸渍法制备Pd/γAl2O3堇青石结构化催化剂.考察了Pd负载量及焙烧温度对催化剂活性与选择性的影响，结果表明:0.5%是适宜的Pd负载量，673 K和773 K是适宜的催化剂焙烧温度.通过TEM、BET、XPS等手段对催化剂进行表征，结果发现负载量增加时催化剂分散度降低，适当提高催化剂焙烧温度能增加金属Pd的分散度，但XPS表征显示催化剂表面Pd原子分数却呈下降趋势.从Pd3d5/2结合能和半峰宽FWHM数据可知，高温焙烧可能产生两种形态的PdO，在673 K和773 K焙烧时生成了较多的有利于间二硝基苯催化加氢的PdO，因此其活性与选择性最佳.
Abstract:
The preparation of monolithic Pdbased catalyst on cordierite support with γAl2O3 washcoats were investigated in the system of the hydrogenation reaction of mdinitrobenzene to mphenylenediamine.The optimized parameters of its high activity and selectivity were of the palladium loading of 0.5% and the calcination temperature of 673 K and 773 K.TEM,BET,and XPS examinations showed that Pd dispersion on the catalyst surface reduced as the increase of Pd loading,but it can be improved as the increase of the calcination temperature.Pd surface atomfraction decreased from 3.13% to 1.05% when the catalyst samples were calcinated in 673 K and 773 K.It can be found from Pd3d5/2 binding energy and the data of FWHM,two kinds of PdO are produced during the high calcination temperature.The PdO catalysts with high effectivity can be prepared at the temperature of 673 K and 773 K,and is favorable to the hydrogenation of mdinitrobenzene to mphenylenediamine.

参考文献/References:

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