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Catalysts 2015, 5(2), 871-904; doi:10.3390/catal5020871

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

1
Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
2
Institute for Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Keith Hohn
Received: 17 March 2015 / Accepted: 19 May 2015 / Published: 29 May 2015
(This article belongs to the Special Issue Feature Papers to Celebrate the Landmarks of Catalysts)
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Abstract

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. View Full-Text
Keywords: reaction kinetics; thermodynamic consistency; nickel; steam reforming; dry reforming; partial oxidation reaction kinetics; thermodynamic consistency; nickel; steam reforming; dry reforming; partial oxidation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Delgado, K.H.; Maier, L.; Tischer, S.; Zellner, A.; Stotz, H.; Deutschmann, O. Surface Reaction Kinetics of Steam- and CO2-Reforming as Well as Oxidation of Methane over Nickel-Based Catalysts. Catalysts 2015, 5, 871-904.

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