Oxygen-Free Methane Aromatization in a Catalytic Membrane Reactor

Low-temperature oxygen-free methane aromatization (OFMA) was carried out in a multifunctional membrane fixed-bed catalytic reactor for the production of benzene and high-purity hydrogen. A 0.5% Ru−3% Mo−HZSM-5 catalyst was used in the temperature range 773−873 K. To assess the beneficial contributio...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2001-05, Vol.40 (10), p.2212-2219
Main Authors: Rival, Olivier, Grandjean, Bernard P. A, Guy, Christophe, Sayari, Abdelhamid, Larachi, Faïçal
Format: Article
Language:English
Subjects:
Applied sciences
Catalysis
Catalytic reactions
Chemical engineering
Chemistry
Energy
Exact sciences and technology
Fuel processing. Carbochemistry and petrochemistry
Fuels
Gas processing
General and physical chemistry
Reactors
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Low-temperature oxygen-free methane aromatization (OFMA) was carried out in a multifunctional membrane fixed-bed catalytic reactor for the production of benzene and high-purity hydrogen. A 0.5% Ru−3% Mo−HZSM-5 catalyst was used in the temperature range 773−873 K. To assess the beneficial contribution of the membrane, OFMA was conducted without permeation in a fixed-bed (FB) conventional configuration as well as with permeation in a membrane catalytic reactor (MCR) configuration. Selective crosswise withdrawal of produced hydrogen not only led to benzene production in the MCR of twice that in the FB configuration but also, at the highest tested temperature, boosted the conversion of methane to benzene slightly above the thermodynamic limit. However, because of continuous withdrawal of coproduced hydrogen, catalyst deactivation was more pronounced in the MCR configuration than in the FB configuration. Experiments exploring various FB and MCR operating conditions allowed the elaboration of a phenomenological reaction-separation model matching the observed behavior under steady-state conditions for both configurations.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie001089k