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

页码：37 / 43

页数：7

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