Hydrogen production from steam-methanol reforming

Thermodynamic analysis

Research output: Contribution to journalArticle

122 Citations (Scopus)

Abstract

Thermodynamic equilibrium involved in the steam reforming of methanol is re-examined to cover the extended range of compounds suggested by literature to be involved in the reactions. The equilibrium concentrations are determined for different mixtures of these compounds at 1 atm and at different temperatures (360-573 K) and at different steam/methanol molar feed ratios (0-1.5), by the method of direct minimization of Gibbs free energy. The possibility of carbon formation in these conditions is determined by direct inclusion of carbon in the objective function of the minimization scheme. Results showed that the area of carbon formation region is surprisingly high. Carbon and methane formations are thermodynamically favoured and they reduce the quantity and quality of hydrogen produced. Dimethyl ether formation occurs at low temperatures and low steam/carbon feed ratios, while carbon monoxide occurs at high temperatures and low steam carbon ratios.

Original languageEnglish
Pages (from-to)47-53
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume25
Issue number1
DOIs
Publication statusPublished - Jan 2000

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Steam
hydrogen production
Reforming reactions
Hydrogen production
steam
Methanol
Carbon
methyl alcohol
Thermodynamics
thermodynamics
carbon
optimization
Steam reforming
Methane
Gibbs free energy
Carbon Monoxide
thermodynamic equilibrium
Carbon monoxide
Temperature
carbon monoxide

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment

Cite this

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abstract = "Thermodynamic equilibrium involved in the steam reforming of methanol is re-examined to cover the extended range of compounds suggested by literature to be involved in the reactions. The equilibrium concentrations are determined for different mixtures of these compounds at 1 atm and at different temperatures (360-573 K) and at different steam/methanol molar feed ratios (0-1.5), by the method of direct minimization of Gibbs free energy. The possibility of carbon formation in these conditions is determined by direct inclusion of carbon in the objective function of the minimization scheme. Results showed that the area of carbon formation region is surprisingly high. Carbon and methane formations are thermodynamically favoured and they reduce the quantity and quality of hydrogen produced. Dimethyl ether formation occurs at low temperatures and low steam/carbon feed ratios, while carbon monoxide occurs at high temperatures and low steam carbon ratios.",
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T2 - Thermodynamic analysis

AU - Lwin, Ye

AU - Wan Daud, Wan Ramli

AU - Mohamad, Abu Bakar

AU - Yaakob, Zahira

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AB - Thermodynamic equilibrium involved in the steam reforming of methanol is re-examined to cover the extended range of compounds suggested by literature to be involved in the reactions. The equilibrium concentrations are determined for different mixtures of these compounds at 1 atm and at different temperatures (360-573 K) and at different steam/methanol molar feed ratios (0-1.5), by the method of direct minimization of Gibbs free energy. The possibility of carbon formation in these conditions is determined by direct inclusion of carbon in the objective function of the minimization scheme. Results showed that the area of carbon formation region is surprisingly high. Carbon and methane formations are thermodynamically favoured and they reduce the quantity and quality of hydrogen produced. Dimethyl ether formation occurs at low temperatures and low steam/carbon feed ratios, while carbon monoxide occurs at high temperatures and low steam carbon ratios.

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