文献类型：期刊文献

英文题名：Effect of Metal Active Sites on the Product Distribution over Composite Catalysts in the Direct Synthesis of Aromatics from Syngas

作者：Yang, Tianhui[1];Cheng, Like[1];Li, Na[1];Liu, Dianhua[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：56

期号：41

起止页码：11763

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20174304296201);WOS:【SCI-EXPANDED(收录号:WOS:000413503200012)】；

基金：The authors acknowledge the financial support from the National Key R&D Program of China (2017YFB0602204).

语种：英文

外文关键词：Aluminum oxide - Hematite - II-VI semiconductors - Synthesis gas - Zinc oxide - Catalyst activity - Mixtures - Silica - Alumina - Aromatization - Catalyst selectivity

摘要：The conversion of syngas, to aromatics over composite catalysts, comprising a mixture of Fe2O3-SiO2 and Nb-/Ni- modified HZSM-5 (HZ), CuO-ZnO-Al2O3 (CZA) and Nb-/Ni- modified HZ, and a mixture of above two kinds of metal oxides and Ni-HZ, were investigated at 330 degrees C, 4 MPa and H-2:CO = 2:1. Catalysts were characterized to analyze the properties. Fe2O3-SiO2/modified-HZ had the high selectivity of BTX, while CuO-ZnO-Al2O3/modified-HZ had the high selectivity of durene. Fe-CZA/Ni-HZ exhibited higher selectivity of trimethylbenzene (triMB) than both Fe/Ni-HZ and CZA/Ni-HZ, lower selectivity of BTX and tetramethylbenzene (tetraMB), compared with Fe/Ni-HZ and CZA/Ni-HZ, respectively. Reaction pathways were speculated to illustrate the diverse distribution of aromatics. The incorporation of Nb and Ni on the parent HZSM-5 increased the selectivity of aromatics due to their various acidity. The highest selectivity of BTX was obtained over Fe/Ni-HZ and the highest selectivity of durene Was achieved over CZA/Nb-Ni-HZ.