Ethylene and diethyl-ether production by dehydration reaction of ethanol over different heteropolyacid catalysts

被引：166

作者：

Varisli, Dilek

Dogu, Timur ^{[1
]}

Dogu, Gulsen

机构：

[1] Middle E Tech Univ, Dept Chem Engn, Ankara, Turkey

[2] Gazi Univ, Dept Chem Engn, Ankara, Turkey

来源：

CHEMICAL ENGINEERING SCIENCE | 2007年 / 62卷 / 18-20期

关键词：

heteropolyacid catalysts; catalyst selectivity; catalyst activation; kinetics; tungstophosphoricacid; ethylene; diethylether; reaction engineering;

D O I：

10.1016/j.ces.2007.01.017

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Dehydration reaction of ethanol was investigated in a temperature range of 140-250 degrees C with three different heteropolyacid catalysts, namely tungstophosphoricacid (TPA), silicotungsticacid (STA) and molybdophosphoricacid (NIPA). Very high ethylene yields over 0.75 obtained at 250 degrees C with TPA was highly promising. At temperatures lower than 180 degrees C the main product was diethyl-ether. Presence of water vapor was shown to cause some decrease of catalyst activity. Results showing that product selectivities did not change much with the space time in the reactor indicated two parallel routes for the production of ethylene and DEE. Among the three HPA catalysts, the activity trend was obtained as STA > TPA > MPA. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：5349 / 5352

页数：4

共 13 条

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