Surface Reaction Kinetics of Steam- and CO2-Reforming as Well as Oxidation of Methane over Nickel-Based Catalysts

被引：136

作者：

Delgado, Karla Herrera ^{[1
]}

Maier, Lubow ^{[2
]}

Tischer, Steffen ^{[2
]}

Zellner, Alexander ^{[1
]}

Stotz, Henning ^{[1
]}

Deutschmann, Olaf ^{[1
,2
]}

机构：

[1] KIT, Inst Chem Technol & Polymer Chem, D-76128 Karlsruhe, Germany

[2] KIT, Inst Catalysis Res & Technol, D-76128 Karlsruhe, Germany

来源：

CATALYSTS | 2015年 / 5卷 / 02期

关键词：

reaction kinetics; thermodynamic consistency; nickel; steam reforming; dry reforming; partial oxidation; WATER-GAS-SHIFT; OXIDE FUEL-CELL; DENSITY-FUNCTIONAL THEORY; IN-SITU DRIFTS; REACTION-MECHANISM; STICKING PROBABILITIES; OXYGEN-CHEMISORPTION; HYDROGEN ADSORPTION; TRANSIENT-BEHAVIOR; SYNGAS PRODUCTION;

D O I：

10.3390/catal5020871

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：

An experimental and kinetic modeling study on the Ni-catalyzed conversion of methane under oxidative and reforming conditions is presented. The numerical model is based on a surface reaction mechanism consisting of 52 elementary-step like reactions with 14 surface and six gas-phase species. Reactions for the conversion of methane with oxygen, steam, and CO2 as well as methanation, water-gas shift reaction and carbon formation via Boudouard reaction are included. The mechanism is implemented in a one-dimensional flow field description of a fixed bed reactor. The model is evaluated by comparison of numerical simulations with data derived from isothermal experiments in a flow reactor over a powdered nickel-based catalyst using varying inlet gas compositions and operating temperatures. Furthermore, the influence of hydrogen and water as co-feed on methane dry reforming with CO2 is also investigated.

引用

页码：871 / 904

页数：34

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