Alumina-platinum catalyst in the reductive dehydration of ethanol and diethyl ether to alkanes

被引：22

作者：

Yandieva, F. A. ^{[1
]}

Tsodikov, M. V. ^{[1
]}

Chistyakov, A. V. ^{[1
]}

Kugel', V. Ya. ^{[1
]}

Zubavichus, Ya. V. ^{[2
]}

Veligzhanin, A. A. ^{[2
]}

Kitaev, L. E. ^{[3
]}

Yushchenko, V. V. ^{[3
]}

Gekhman, A. E. ^{[4
]}

Moiseev, I. I. ^{[1
]}

机构：

[1] Russian Acad Sci, AV Topchiev Petrochem Synth Inst, Moscow 119991, Russia

[2] Russian Res Ctr, Kurchatov Inst, Moscow 123182, Russia

[3] Moscow MV Lomonosov State Univ, Moscow 119899, Russia

[4] Russian Acad Sci, NS Kurnakov Gen & Inorgan Chem Inst, Moscow 117901, Russia

来源：

KINETICS AND CATALYSIS | 2010年 / 51卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

TEMPERATURE; DESORPTION; AMMONIA; WATER;

D O I：

10.1134/S0023158410040142

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 reductive dehydration of ethanol and diethyl ether selectively occurs with the formation of alkanes to C10+ on an AP-64 alumina-platinum catalyst (0.6 wt % Pt/gamma-Al2O3) after its reduction with hydrogen at 450A degrees C for 12 h in Ar. It was found that one of the main reaction paths is the insertion of ethylene into substrate intermediates with the predominant formation of normal alkanes. It was found by XAFS spectroscopy that Pt2Al intermetallide particles were formed along with platinum metal clusters after long reduction. The ammonia TPD data indicated a change in the acid properties of the surface after the long reduction of the catalyst: the concentration of medium-strength surface aprotic acid sites increased by a factor of 2. It was found that the interaction of aprotic sites with water vapor resulted in the formation of strong proton acid sites. It is likely that these latter are responsible for the growth of a carbon skeleton in the course of alkane formation from ethanol.

引用

页码：548 / 558

页数：11

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