Isotopic transient study of methanol decomposition over noble metal/ceria catalysts

被引：9

作者：

Avgouropoulos, George ^{[1
]}

机构：

[1] Fdn Res & Technol Hellas FORTH, Inst Chem Engn & High Temp Chem Proc ICE HT, GR-26504 Patras, Greece

来源：

CATALYSIS COMMUNICATIONS | 2009年 / 10卷 / 05期

关键词：

Methanol decomposition; SSITKA; Noble metal; Ceria; Hydrogen; HETEROGENEOUS CATALYSIS; MECHANISTIC ASPECTS; CUO-CEO2; CATALYSTS; KINETIC-ANALYSIS; STEAM; CERIA; ZN; WATER; GAS; COMBUSTION;

D O I：

10.1016/j.catcom.2008.11.019

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：

Methanol decomposition reaction was studied over combustion-synthesized noble metal (Pt, Pd, Rh)/ ceria catalysts using the steady-state isotopic transient kinetic analysis (SSITKA) method. The C-13-containing reactants and products were monitored following a (CH3OH)-C-12/Ar/He -> (CH3OH)-C-13/He switch. Average life-time and concentration of adsorbed intermediate species which lead to CO, and overall reaction rate at 220 degrees C, were determined. Significant amounts of active intermediate species were formed on the ceria support or/and metal-ceria interface. A clear concave shape of the curve of the semilogarithmic plot of the molar fraction of CO versus time was indicative of a parallel mechanism followed for its formation. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：682 / 686

页数：5

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