Development of mixed-conducting dense ceramic membranes for hydrogen separation.
The electronic transference numbers of BCY were relatively low when compared with the protonic numbers. At 800 C, a hydrogen flux of only 0.02 cm{sup 3}/min/cm{sup 2} was obtained in an {approx} 2-rnm-thick BCY sample by short-circuiting the two Pt electrodes. We have developed a novel composite system with improved electronic transport, and preliminary measurements indicate that the new membrane materials can be used in a nongalvanic mode to separate hydrogen from gas mixtures. A maximum flux of 0.12 cm{sup 3}/min/cm{sup 2} has been measured at 800 C in the composite material operated in the nongalvanic mode. Currently, work is underway to further enhance the hydrogen flux in the composite membrane materials.
- Research Organization:
- Argonne National Lab., IL (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 8891
- Report Number(s):
- ANL/ET/CP-94969; TRN: AH200117%%274
- Resource Relation:
- Conference: 5th International Conference on Inorganic Membranes, Nagoya (JP), 06/22/1998--06/26/1998; Other Information: PBD: 17 Apr 1998
- Country of Publication:
- United States
- Language:
- English
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