FTIR and mass spectrometric study of the interaction of ethanol and ethanol-water with oxide-supported platinum catalysts

被引：77
|
作者：
Raskó, J
Dömök, A
Baán, K
Erdohelyi, A
机构：
[1] Univ Szeged, Inst Solid State & Radiochem, H-6701 Szeged, Hungary
[2] Univ Szeged, React Kinet Res Grp, Hungarian Acad Sci, H-6701 Szeged, Hungary
来源：
APPLIED CATALYSIS A-GENERAL | 2006年 / 299卷 / 202-211期
基金：
匈牙利科学研究基金会;
关键词：
ethanol steam reforming; surface species; TPD of ethanol; gas phase products; reaction of ethanol with water; oxide-supported Pt catalysts;
D O I：
10.1016/j.apcata.2005.10.027
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 formation and stability of surface species formed in the interaction of ethanol and ethanol-water mixture with Al2O3-, TiO2- and CeO2-supported Pt catalysts were studied by FTIR. The changes of the gas phase composition during the above processes were monitored by mass spectrometer. It was found that water enhanced the stability of ethoxide surface species formed in the dissociation of ethanol on Pt catalysts and suppressed the formation of CO. Dehydrogenation of molecularly adsorbed ethanol was proposed as a key reaction step. On the temperature programmed desorption (TPD) spectra of adsorbed ethanol in the case of supported Pt there is a high temperature desorption stage, which was explained by the formation and decomposition of surface acetate species. A possible mechanism of the reaction is discussed. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：202 / 211
页数：10
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