Reversible deactivation of γ-alumina by steam in the gas-phase dehydration of methanol to dimethyl ether

被引：43

作者：

Boon, Jurriaan ^{[1
,2
]}

van Kampen, Jasper ^{[1
,2
]}

Hoogendoorn, Roelof ^{[1
,3
]}

Tanase, Stefania ^{[3
]}

van Berkel, Frans P. F. ^{[1
]}

Annaland, Martin van Sint ^{[2
]}

机构：

[1] TNO, ECN, Sustainable Proc Technol, POB 1, NL-1755 ZG Petten, Netherlands

[2] TU E, Chem Proc Intensificat, POB 513, NL-5600 MB Eindhoven, Netherlands

[3] Univ Amsterdam, vant Hoff Inst Mol Sci, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

来源：

CATALYSIS COMMUNICATIONS | 2019年 / 119卷

基金：

欧盟地平线“2020”;

关键词：

Methanol dehydration; gamma-alumina; Boehmite; Reversible deactivation; Reaction kinetics; ALCOHOL DEHYDRATION; CATALYTIC-ACTIVITY; GAMMA-AL2O3; BOEHMITE; KINETICS; SURFACE; TEMPERATURE; MECHANISM; ACIDITY; WATER;

D O I：

10.1016/j.catcom.2018.10.008

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：

Acidic gamma-Al2O3 is an active catalyst for the dehydration of methanol to dimethyl ether (DME). However, the produced steam reduces the activity. In this work, the influence of the exposure of gamma-Al2O3 to steam on the catalytic activity for methanol dehydration has been determined. At 250 degrees C and increasing stream partial pressure the conversion of gamma-Al2O3 into gamma-AlO(OH) is observed at a p(H2O) of 13-14 bar. As a consequence, the catalytic activity decreases, reducing the rate of methanol dehydration to around 25%. However, this conversion is reversible and under reaction conditions gamma-AlO(OH) converts back to gamma-Al2O3, recovering its catalytic activity.

引用

页码：22 / 27

页数：6

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