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Oxygen flux and process analysis of hydrogen separation from water through mixed conducting membrane

Published online by Cambridge University Press:  01 February 2011

Annamalai Karthikeyan ,
Hengdong Cui ,
Srikanth Gopalan  and
Uday B. Pal
Annamalai Karthikeyan
Affiliation:
[email protected], Boston University, Manufacturing Engineering, 15 Saint Mary's Street, Brookline, MA, 02446, United States, 617 358 1297, 617 353 5548
Hengdong Cui
Affiliation:
[email protected], Boston University, Manufacturing Engineering, United States
Srikanth Gopalan
Affiliation:
[email protected], Boston University, Manufacturing Engineering, United States
Uday B. Pal
Affiliation:
[email protected], Boston University, Manufacturing Engineering, United States
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Abstract

Hydrogen synthesis and segregation from water splitting with simultaneous partial oxidation of methane can be achieved using MIEC membranes that conduct oxygen ions and electrons. The process offers hydrocarbon free hydrogen production on the feed side of the membrane (steam side) and syn-gas on the permeate side (methane side). A composite MIECs system comprising GdxCe1−xO2−x/2 (GDC) and GdxSr1−xTi1−yAlyO3 (GSTA) has been used and the hydrogen flux has been estimated. The oxygen diffusion coeffcient for oxygen transport through the bulk of the membrane and surface exchange coefficient of oxygen at the solid/gas interface were obtained using electrical conductivity relaxation (ECR) experiments and the hydrogen generation flux was measured for membranes of different thicknesses, with and without surface exchange catalysts for various experimental conditions.

Keywords

compositeenergetic materialionic conductor
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 885: Symposium A – The Hydrogen Cycle – Generation, Storage and Fuel Cells , 2005 , 0885-A11-05
Copyright
Copyright © Materials Research Society 2006

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References

REFERENCES

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