Copper substituted heteropolyacid catalysts for the selective dehydration of ethanol

被引：21

作者：

Ali, Tarek T. ^{[2
]}

Al-Thabaiti, S. A. ^{[1
]}

Alyoubi, A. O. ^{[1
]}

Mokhtar, M. ^{[1
]}

机构：

[1] King Abdulaziz Univ, Fac Sci, Dept Chem, Jeddah 21589, Saudi Arabia

[2] King Abdulaziz Univ, Fac Educ, Dept Sci, Jeddah 21454, Saudi Arabia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 496卷 / 1-2期

关键词：

Catalyst selectivity; Copper phosphomolybdates; Keggin structure; Diethyl ether; Ethylene; Catalysis; Dehydration; ACID; POLYOXOMETALATE; ETHYLENE; FILMS;

D O I：

10.1016/j.jallcom.2010.02.100

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 catalytic conversion of ethanol was carried out over H(3)PMo(12)O(40)center dot xH(2)O (H(3)PMo) and its substituted copper ions with formula Cu(0.5x)H(3-x)PMo(12)O(40) (where x = 1, 2 and 3). Pure and Cu-substituted catalyst samples were calcined at 350 degrees C. The effect of copper ions substitution on the thermal behaviour, structural, acidic, surface and catalytic properties of the investigated samples were studied using TG, DSC, FTIR, pyridine adsorption at 25 degrees C. N(2) adsorption at -196 degrees C. Maximum selectivity of diethyl ether and the second major reaction product ethylene was obtained at 350 degrees C. The substitution of copper in the H3PMo resulted in increase of the selectivity towards diethyl formation to attain a maximum value using Cu(2)PMo-350 catalyst. Very high diethyl ether over ethylene yield values obtained in this study at 350 degrees C are highly promising for the production of petrochemicals from ethanol. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：553 / 559

页数：7

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