Combined steam and carbon dioxide reforming of methane and side reactions: Thermodynamic equilibrium analysis and experimental application

Won Jun Jang, Dae Woon Jeong, Jae Oh Shim, Hak Min Kim, Hyun Seog Roh, In Hyuk Son, Seung Jae Lee

Research output: Contribution to journalArticle

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Abstract

Thermodynamic equilibrium analysis of the combined steam and carbon dioxide reforming of methane (CSCRM) and side reactions was performed using total Gibbs free energy minimization. The effects of (CO2 + H2O)/CH4 ratio (0.9-2.9), CO2:H2O ratio (3:1-1:3), and temperature (500-1000 °C) on the equilibrium conversions, yields, coke yield, and H2/CO ratio were investigated. A (CO2 + H2O)/CH4 ratio greater than 1.2, a CO2:H2O ratio of 1:2.1, and a temperature of at least 850 °C are preferable reaction conditions for the synthesis gas preparation in the gas to liquid process. Simulated conditions were applied to the CSCRM reaction and the experimental data were compared with the thermodynamic equilibrium results. The thermodynamic equilibrium results were mostly consistent with the experimental data, but the reverse water gas shift reaction rapidly occurred in the real chemical reaction and under excess oxidizing agent conditions. In addition, a long-term stability test (under simulated conditions) showed that the equilibrium conversion was maintained for 500 h and that the coke formation on the used catalyst was not observed.

Original languageEnglish
Pages (from-to)80-91
Number of pages12
JournalApplied Energy
Volume173
DOIs
Publication statusPublished - 2016 Jul 1

Fingerprint

Reforming reactions
Carbon dioxide
Methane
Steam
carbon dioxide
thermodynamics
methane
Thermodynamics
Coke
Water gas shift
Synthesis gas
Gibbs free energy
gas
Chemical reactions
Temperature
Catalysts
chemical reaction
Liquids
Gases
temperature

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Energy(all)
  • Mechanical Engineering
  • Management, Monitoring, Policy and Law

Cite this

Jang, Won Jun ; Jeong, Dae Woon ; Shim, Jae Oh ; Kim, Hak Min ; Roh, Hyun Seog ; Son, In Hyuk ; Lee, Seung Jae. / Combined steam and carbon dioxide reforming of methane and side reactions : Thermodynamic equilibrium analysis and experimental application. In: Applied Energy. 2016 ; Vol. 173. pp. 80-91.
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Combined steam and carbon dioxide reforming of methane and side reactions : Thermodynamic equilibrium analysis and experimental application. / Jang, Won Jun; Jeong, Dae Woon; Shim, Jae Oh; Kim, Hak Min; Roh, Hyun Seog; Son, In Hyuk; Lee, Seung Jae.

In: Applied Energy, Vol. 173, 01.07.2016, p. 80-91.

Research output: Contribution to journalArticle

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AU - Jeong, Dae Woon

AU - Shim, Jae Oh

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AU - Roh, Hyun Seog

AU - Son, In Hyuk

AU - Lee, Seung Jae

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