Steam reforming of hexadecane over a Rh/CeO2 catalyst in microchannels: Experimental and numerical investigation

被引：81

作者：

Thormann, J. ^{[1
]}

Maier, L. ^{[2
,3
]}

Pfeifer, P. ^{[1
]}

Kunz, U. ^{[4
]}

Deutschmann, O. ^{[2
,3
]}

Schubert, K. ^{[1
]}

机构：

[1] Forschungszentrum Karlsruhe, Inst Micro Proc Engn IMVT, D-76344 Eggenstein Leopoldshafen, Germany

[2] Univ Karlsruhe, Inst Chem Technol & Polymer Chem, D-76131 Karlsruhe, Germany

[3] Forschungszentrum Karlsruhe, Inst Nucl & Energy Technol IKET, D-76344 Eggenstein Leopoldshafen, Germany

[4] Tech Univ Clausthal, Inst Chem Proc Engn, D-38678 Clausthal Zellerfeld, Germany

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 12期

关键词：

Hexadecane steam reforming; Heterogeneous kinetics; Reaction mechanism; Microchannel reactor; WATER-GAS-SHIFT; DIESEL FUEL; COMBUSTION MONOLITH; HYDROGEN-PRODUCTION; REACTION-MECHANISM; CO2; HYDROGENATION; PARTIAL OXIDATION; MICRO REACTOR; SUPPORTED PD; METHANE;

D O I：

10.1016/j.ijhydene.2009.04.031

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：

Hexadecane is chosen as diesel surrogate to experimentally and numerically investigate diesel reforming in microchannels coated with Rh/CeO(2). A detailed kinetic model is presented and discussed using experimental data on steam reforming of not only hexadecane but also of methane and propane providing a more detailed understanding also of conversion of hexadecane fragments. The turnover frequencies of these linear alkanes were found to be inversely proportional to the number of carbon atoms per hydrocarbon molecule. Based on these results, a kinetic model was developed that links a global reaction equation for the dissociative adsorption of long-chain hydrocarbons with an elementary surface reaction mechanism of steam reforming of methane over Rh/Al(2)O(3) catalysts. The model adequately describes the observed correlation between turnover frequency and the number of carbon atoms the hydrocarbon contains. Furthermore, a significant impact of the ceria support on the reformate composition was observed. (c) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：5108 / 5120

页数：13

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