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

Catalysts

Karla Herrera Delgado²  Lubow Maier¹  Steffen Tischer¹  Alexander Zellner²  Henning Stotz²  Olaf Deutschmann² 

[1] Institute for Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany; E-Mails:;Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany; E-Mails:

关键词: reaction kinetics;    thermodynamic consistency;    nickel;    steam reforming;    dry reforming;    partial oxidation;   

DOI  :  10.3390/catal5020871

来源: mdpi

【 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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.