Hydrogen production from methane by using oxygen permeable ceramics

Hitoshi Takamura, Yusuke Aizumi, Atsunori Kamegawa, Masuo Okada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Oxygen permeable ceramics based on mixed conductors are attracting much attention for use in partial oxidation of hydrocarbons as a novel technique for syngas and pure hydrogen production. This paper describes the preparation and oxygen permeation properties including methane reforming property of a novel member of oxygen permeable ceramics. The materials used are solid solutions of (La0.5Ba0.3Sr0.2)(FexIn 1-x)O3-δ. The single phase of perovskite-type (La0.5Ba0.3Sr0.2)(FexIn 1-x)O3-δis obtained in the range of x = 0.4 to 0.9. The highest oxygen flux densities of 2.2 and 11 μmol/cm2 s are attained for (La0.5Ba0.3Sr0.2)(Fe xIn1-x)O3-δ.(x = 0.6) at 1000°C under He / air and CH4 / air gradients, respectively. The electrical conductivity of (La0.5Ba0.3Sr0.2)(Fe 0.6In0.4)O3-δ. is dominated by p-type conduction having a slope of 1/4 under the high P(O2) region. The oxide-ion conductivity of the same sample is estimated to be 0.05 S/cm at 800°C. Even though the oxygen flux density slightly decreases with increasing time, high CO selectivity of 90% is kept for 100 h. The oxygen flux density of the solid solution is also discussed in the context of surface exchange kinetics.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005
EditorsR.K. Shah, E.U. Ubong, S.S. Samuelsen
Pages593-599
Number of pages7
Publication statusPublished - 2005 Nov 22
Externally publishedYes
Event3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 - Ypsilanti, MI, United States
Duration: 2005 May 232005 May 25

Publication series

NameProceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005

Other

Other3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005
CountryUnited States
CityYpsilanti, MI
Period05/5/2305/5/25

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Takamura, H., Aizumi, Y., Kamegawa, A., & Okada, M. (2005). Hydrogen production from methane by using oxygen permeable ceramics. In R. K. Shah, E. U. Ubong, & S. S. Samuelsen (Eds.), Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 (pp. 593-599). [FUELCELL-74173] (Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005).