Activity and deactivation studies for direct dimethyl ether synthesis using CuO-ZnO-Al2O3 with NH4ZSM-5, HZSM-5 or γ-Al2O3

被引：91

作者：

Abu-Dahrieh, Jehad ^{[1
]}

Rooney, David ^{[1
]}

Goguet, Alexandre ^{[1
]}

Saih, Youssef ^{[1
]}

机构：

[1] Queens Univ Belfast, Sch Chem & Chem Engn, CenTACat, Belfast BT9 5AG, Antrim, North Ireland

来源：

CHEMICAL ENGINEERING JOURNAL | 2012年 / 203卷

基金：

英国工程与自然科学研究理事会;

关键词：

Methanol synthesis; DME synthesis; Methanol dehydration; CuO/ZnO/Al2O3; catalyst; Acid catalyst; Syngas; METHANOL SYNTHESIS CATALYST; HYBRID CATALYSTS; SYNTHESIS GAS; GAMMA-ALUMINA; DME SYNTHESIS; ADMIXED CATALYSTS; ACID PROPERTIES; DEHYDRATION; SYNGAS; CU/ZNO/AL2O3;

D O I：

10.1016/j.cej.2012.07.011

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Herein we investigate the use of CuO-ZnO-Al2O3 (CZA) with different solid acid catalysts (NH(4)ZSM-5. HZSM-5 or gamma-Al2O3) for the production of dimethyl ether from syngas. It was found that of the solid acids, which are necessary for the dehydration function of the admixed system, the CZA/HZSM-5 bifunctional catalyst with a 0.25 acid fraction showed high stability over a continuous period of 212 h. As this particular system was observed to loose around 16.2% of its initial activity over this operating period this study further investigates the CZA/HZSM-5 bifunctional catalyst in terms of its deactivation mechanisms. TPO investigations showed that the catalyst deactivation was related to coke deposited on the metallic sites: interface between the metallic sites and the support near the metal-support: and on the support itself. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：201 / 211

页数：11

共 51 条

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