文献类型：期刊文献

英文题名：Liquid phase hydrodechlorination of chlorinated aromatics at lower temperature on highly defective Pd sites

作者：Li, Xinzheng[1];Jin, Zhonghao[1,2];Dai, Qiguang[1];Wang, Xingyi[1]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Lab Adv Mat, Shanghai 200237, Peoples R China;[2]SINOPEC, Shanghai Res Inst Petrochem Technol, 1658 Pudong Beilu, Shanghai 201208, Peoples R China

年份：2019

卷号：45

期号：3

起止页码：1087

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20184706123196);WOS:【SCI-EXPANDED(收录号:WOS:000459004900014)】；

基金：We would like to acknowledge the National Key Research and Development Program of China (No. 2016YFC0204300) and the National Natural Science Foundation of China (Nos. 21477036 and 21777043).

语种：英文

外文关键词：Hydrodechlorination; Chlorophenols; Chlorobenzene; Palladium; Mesoporous silica-carbon composites

摘要：Pd catalyst supported on ordered mesoporous silica-carbon nanocomposites (Pd/MSC) was used in hydrodechlorination (HDC) of chlorinated phenol and aromatics at low temperature. Characterization of XRD, XPS, HRTEM and H-2-TPD shows Pd nanoparticles of 13.4nm at nanocrystal joining areas and edge steps on hybrid support of carbon and silica. A large amount of reactive H species exists on Pd/MSC, which exhibits high activity for HDC of chlorinated aromatics at a lower temperature under normal hydrogen pressure. At 258K, the TOFs for 4-chlorophenol and chlorobenzene are 26.3 and 49.6min(-1), respectively. Using triethylamine as a probe, the HDC of chlorophenols was promoted by reactive H species through the formation of sigma-complex of Pd with chlorophenols.