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Applying Reaction Kinetics to Pseudohomogeneous Methanation Modeling in Fixed‐Bed Reactors
Author(s) -
Scharl Valentin,
Fischer Felix,
Herrmann Stephan,
Fendt Sebastian,
Spliethoff Hartmut
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201900535
Subject(s) - methanation , work (physics) , thermodynamics , kinetics , chemistry , chemical kinetics , computational fluid dynamics , chemical reaction engineering , reaction rate , materials science , chemical engineering , catalysis , organic chemistry , physics , engineering , quantum mechanics
Reactor simulations can reduce the effort when designing fixed‐bed reactors for methanation processes. Several microkinetic models were developed under a variety of operating conditions. However, most production‐scale fixed‐bed methanation processes exceed the temperature range in which these kinetic models were obtained. In addition, heat and mass transport limitations strongly influence the reaction kinetics. In this work, microkinetic rate equations for CO and CO 2 methanation were analyzed with respect to their suitability for high‐temperature, pseudohomogeneous reactor modeling. The best‐suited kinetic model was fitted to the operating conditions and validated by means of CFD simulations. It is shown that the simulations match the experimental data for various operating conditions.