Steam and CO2 reforming of methane over a Ru/ZrO2 catalyst

被引：62
|
作者：
Jakobsen, Jon Geest [1 ,2 ]
Jorgensen, Tommy L. [1 ]
Chorkendorff, Ib [2 ]
Sehested, Jens [1 ]
机构：
[1] Haldor Topsoe Res Labs, DK-2800 Lyngby, Denmark
[2] Tech Univ Denmark, Dept Phys, CINF, DK-2800 Lyngby, Denmark
来源：
APPLIED CATALYSIS A-GENERAL | 2010年 / 377卷 / 1-2期
基金：
新加坡国家研究基金会;
关键词：
Methane steam reforming; TEM; Kinetics; Ruthenium; CARBON-MONOXIDE; SYNTHESIS GAS; CHEMICAL CONVERSION; SITE REQUIREMENTS; RU CATALYSTS; ADSORPTION; HYDROGEN; KINETICS; COADSORPTION; DESORPTION;
D O I：
10.1016/j.apcata.2010.01.035
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 kinetics of methane steam reforming over a Ru/ZrO2 catalyst was studied at 1.3 bar total pressure and in the temperature range 425-575 degrees C. These data were fitted by combining a reactor model with a series of kinetic models. The best fit was obtained by a model with methane dissociative adsorption as the rate limiting step and with CO and H adspecies partly blocking the active sites. The Ru/ZrO2 catalyst was characterized by TEM and H-2 chemisorption. By comparison of ex situ and in situ TEM, it is evident that Ru particles with diameters of <2 nm are difficult to observe with ex situ TEM due to oxidation when exposed to air. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：158 / 166
页数：9
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