纳米Pd-PEG/C催化剂的制备及其催化加氢二硝基甲苯  

Preparation of Pd-PEG/C Nanoparticle Catalysts for Catalytic Hydrogenation of Dinitrotoluene

作　　者：李强 郁丰善 Li Qiang;Yu Fengshan(Jiangxi Han’s Precious Metals Co.,Ltd.,Shangrao 335500,China)

机构地区：[1]江西省汉氏贵金属有限公司

出　　处：《中国资源综合利用》2020年第1期5-7,共3页China Resources Comprehensive Utilization

基　　金：江西省省级企业技术中心项目;江西省贵金属催化剂工程技术研究者中心项目(项目编号：20171BCD40058);首届双千计划引进类高层次创新创业团队(项目编号：jxsq2018105025)的阶段性研究成果之一

摘　　要：本研究采用浸渍-沉淀法制备了理论负载量为5%的Pd/C及Pd-PEG/C催化剂,利用分散度分析、透射电镜(TEM)等表征方法对其结构、形貌进行分析。表征结果表明,PEG的加入有效地提高了Pd纳米颗粒在活性炭上的分散度,且Pd-PEG/C催化剂具有纳米金属钯平均粒径小、分布均匀、高分散度等优点。同时,选取二硝基甲苯(DNT)选择性加氢合成二氨基甲苯(TDA)为探针反应,考察催化剂的催化性能。试验结果表明,在同等反应条件下,Pd-PEG/C催化剂催化性能远优于Pd/C。Pd/C and Pd-PEG/C catalysts with theoretical loadings of 5%were prepared by the impregnation-precipitation method,and their structures and morphologies were analyzed by means of dispersion analysis and transmission electron microscopy(TEM)in this study.The characterization results show that the addition of PEG effectively improves the dispersion of Pd nanoparticles on activated carbon,and the Pd-PEG/C catalyst has the advantages of small average particle diameter of nano metal palladium,uniform distribution,and high dispersion.At the same time,the selective hydrogenation of dinitrotoluene(DNT)to diaminotoluene(TDA)was selected as the probe reaction to investigate the catalytic performance of the catalyst.The experimental results show that under the same reaction conditions,the catalytic performance of Pd-PEG/C catalyst is much better than Pd/C.

关 键 词：纳米钯 催化加氢 活性炭 负载型催化剂 

分 类 号：O643.3[理学—物理化学]