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

被引：50
|
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
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2017年 / 56卷 / 41期
基金：
国家重点研发计划;
关键词：
FISCHER-TROPSCH SYNTHESIS; METHANOL SYNTHESIS CATALYST; SYNTHESIS GAS; REACTION-MECHANISM; ZEOLITE CATALYSTS; DIRECT CONVERSION; ZSM-5; CATALYSTS; DIMETHYL ETHER; TO-AROMATICS; CRYSTAL SIZE;
D O I：
10.1021/acs.iecr.7b03450
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
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.
引用
收藏
页码：11763 / 11772
页数：10
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