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Article Dans Une Revue Chemical Engineering Journal Année : 2009

Kinetic modelling of methane decomposition in a tubular solar reactor

Résumé

Solar methane cracking is a promising pathway to produce hydrogen and carbon black with the bonus of zero CO 2 emission. A kinetic simulation of the methane decomposition in a tubular solar chemical reactor prototype is presented. This reactor is composed of four independent tubular reaction zones inserted in a graphite cavity receiver. Chemical reaction modelling is carried out thanks to the Dsmoke software, using a detailed kinetic scheme for the wide range modelling of alkane transformation. First, a kinetic analysis of the chemical system is presented to determine the sequence of methane cracking and a sensitivity analysis of the results on temperature (in the range 1500-2300 K) and on natural gas composition is performed. Then, a kinetic simulation of the solar reactor is proposed and implemented, in which each tubular reaction zone is modelled by three plug-flow reactors in series representing the pre-heating, isothermal, and cooling zones of the reactor. It predicts the evolution of gas species concentrations as a function of residence time. Comparisons with experimental results between 1670 K and 1770 K show good agreement for CH 4 conversion, and CH 4 and H 2 off-gas compositions.

Domaines

Génie chimique
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Dates et versions

hal-02567110 , version 1 (12-05-2020)
hal-02567110 , version 2 (04-05-2022)

Identifiants

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Sylvain Rodat, Stéphane Abanades, Julien Coulié, Gilles Flamant. Kinetic modelling of methane decomposition in a tubular solar reactor. Chemical Engineering Journal, 2009, 146 (1), pp.120-127. ⟨10.1016/j.cej.2008.09.008⟩. ⟨hal-02567110v2⟩
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