文献类型：期刊文献

英文题名：Hydrogenation of commercial polystyrene on Pd/TiO2 monolithic ceramic foam catalysts: catalytic performance and enhanced internal mass transfer

作者：Han, Kai-Yue[1];Cao, Gui-Ping[1];Zuo, Hao-Ran[1];Guo, Wen-Ze[1];Zhu, Zhen-Wei[1];Lu, Chong[2];Wang, Yan-Hua[2]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, UNILAB, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Mat Sci ang Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：114

期号：2

起止页码：501

外文期刊名：REACTION KINETICS MECHANISMS AND CATALYSIS

收录：;EI(收录号：20153101094025);WOS:【SCI-EXPANDED(收录号:WOS:000351177700010)】；

基金：This research was supported by STCSM Non-governmental International Science and Technology Cooperation Program (No. 10520706000), Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20110074110012), and State Key Laboratory of Chemical Engineering Open Fund (No. SKL-ChE-09C07). The author thanks for the support from National College Students Innovative Entrepreneurial Training Plan Program (No. 091025105 and No. 1210251101) and the assistance of Meng Wang and Lei Lu.

语种：英文

外文关键词：Polystyrene hydrogenation; Ceramic foam; Supported catalyst; Internal mass transfer

摘要：Monolithic TiO2 ceramic foam (CF) supported palladium nanoparticles, possessing three-dimensional structure with open accessible pores, were developed as effective catalysts for the hydrogenation of commercial polystyrene. The monolithic CF was synthesized through uniform coating of TiO2 on synthetic template and partial sintering. The mechanical and structural properties of CF were investigated. The distribution and texture of Pd nanoparticles on the CF and their hydrogenation performances were studied. Furthermore, the internal mass transfer analysis of PS coils during the hydrogenation was evaluated. The results showed that the TiO2 CF-0.652 possessed interconnected cell windows of 400-600 mu m and macropores of 200-300 nm on the struts. In 0.06 wt% Pd/CF-0.652, Pd nanoparticles (5.0 nm) were located on the surface of the TiO2 ceramic base, the dispersion of Pd was 34.3 %. As the Pd loading increased, the dispersion of Pd on the Pd/CF significantly decreased. The activity of Pd for PS hydrogenation slightly increased when the Pd loading increased from 0.06 to 0.45 wt%, which could be explained by the existence of interaction between Pd atoms and TiO2 CF at low metal loadings. For Pd/CF-0.652 catalysts, the Weisz modulus was calculated to be less than 0.30, indicating that internal diffusion limitation inside the Pd/CF-0.652 catalysts could be neglected for unique macropores on the struts.