Methane dehydroaromatization over modified Mn/H-ZSM-5 zeolite catalysts: Effect of tungsten as a secondary metal

被引：18
|
作者：
Tshabalala, Themba E. [1 ,2 ]
Coville, Neil J. [2 ]
Scurrell, Michael S. [1 ]
机构：
[1] Univ S Africa, Dept Civil & Chem Engn, POB 392, ZA-0003 Unisa, South Africa
[2] Univ Witwatersrand, Inst Mol Sci, Sch Chem, ZA-2050 Johannesburg, South Africa
来源：
CATALYSIS COMMUNICATIONS | 2016年 / 78卷
基金：
新加坡国家研究基金会;
关键词：
Methane dehydroaromatization (MDA); Manganese; Tungsten; Pt; Ru; H-ZSM-5; DEHYDRO-AROMATIZATION; W/HZSM-5-BASED CATALYSTS; MO/HZSM-5; CATALYST; CONVERSION; BENZENE; MO; DEHYDROGENATION; PERFORMANCE; SURFACE; ABSENCE;
D O I：
10.1016/j.catcom.2016.02.005
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of tungsten (0.5-1.5 wt.%) on the MDA reaction was investigated at 800 degrees C. Addition of W to a 2Mn/H-ZSM-5 catalyst led to a decrease in methane conversion from 6 to 4%. An aromatic selectivity of 74% was obtained with the unpromoted catalyst but this decreased (i.e. from 41 to 12%) with increase in tungsten loading. Addition of Pt or Ru to a 1.5 W/2Mn/H-ZSM-5 catalyst led to an increase in aromatic selectivity from 12 to 55% (Pt) or 46% (Ru) while the coke selectivity decreased from 78 to 37% (Pt) or 42% (Ru) due to the hydrogenating activity of Pt and Ru. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：37 / 43
页数：7
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