Hydrogen production from fossil and renewable sources using an oxygen transport membrane.
Oxygen transport membranes (OTMs) made of mixed ion-electron conductors can be used to increase the production of hydrogen from fossil and renewable sources. This study describes two methods for producing hydrogen with La{sub 0.7}Sr{sub 0.3}Cu{sub 0.2}Fe{sub 0.8}O{sub 3-{delta}} (LSCF7328), an OTM material that is easily prepared, exhibits good mechanical properties, and is stable in severe gas conditions. In tests with thin-film (thickness {approx}22 {micro}m) LSCF7328 membranes, hydrogen was produced by flowing simulated product streams from CO{sub 2} gasification of coal on one side of the OTM and steam on the other side. In this method, the so-called coal gas on the oxygen-permeate side drives the removal of oxygen from the other side of the OTM, where hydrogen and oxygen are produced by water splitting. With CO (99.5% purity) flowing on the oxygen-permeate side, the hydrogen production rate was measured to be {approx}4.7 cm{sup 3}/min-cm{sup 2} at 900 C, indicating that hydrogen can be produced at a significant rate by using product streams from coal gasification. This process also yields a CO{sub 2}-rich product stream that is ready for sequestration. In another test, a tubular LSCF7328 was found to increase the hydrogen production from ethanol reforming by supplying high-purity oxygen from air.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- EE; NETL
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 983466
- Report Number(s):
- ANL/ES/JA-65689; TRN: US201014%%495
- Journal Information:
- Int. J. Hydrogen Energy, Vol. 35, Issue 9 ; May 2010
- Country of Publication:
- United States
- Language:
- ENGLISH
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