A detailed thermodynamic analysis of CO2 hydrogenation to produce methane at low pressure

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Yazarlar

Yarbaş, Tuğba
Ayas, Nezihe

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Yayıncı

Pergamon-Elsevier Science

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

Evaluation of CO2, which is harmful to the environment, as an alternative energy source in CH4 production was investigated from a thermodynamic point of view. The methanation of CO2 is exothermic, however it does not occur at low temperatures due to the kinetic barrier. Thermodynamic modeling studies were carried out to determine the appropriate param- eters in the reaction using the Gaseq software according to the Gibbs free energy mini- mization approach. For this purpose, the effects of H2/CO2 molar feed ratio (2, 3, 4 and 5), temperature (100e1100 ?C) and pressure (1, 3, 5 and 10 atm) on CO2 conversion (XCO2) and CH4 selectivity (SCH4) were investigated. As a result, 99.87% XCO2 and 99.99% SCH4 were reached using the molar ratio of H2/CO2 ¼ 4 at 1 at m and 100 ?C. The CO2 methanation modeling study at low pressure range was studied in detail and low operating pressure proved to be appropriate.

Açıklama

Anahtar Kelimeler

CO2 Methanation, Equilibrium Compositions, Equilibrium Constants, Thermodynamic Modeling, Gaseq Software

Kaynak

International Journal of Hydrogen Energy

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Scopus Q Değeri

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Künye

Yarbaş, T., & Ayas, N. (2023). A detailed thermodynamic analysis of CO2 hydrogenation to produce methane at low pressure. International Journal of Hydrogen Energy, (xxxx). https://doi.org/10.1016/j.ijhydene.2023.06.223

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