High-temperature membranes for gas separation and gas cleanup
Research is directed at furthering the development of two metal-membrane-based processes for (1) economically producing pure hydrogen from the raw gasifier stream, and (2) cleanly and efficiently removing hydrogen sulfide from the hot gas stream. Both of these processes would be accomplished at 700[degrees]C to 800[degrees]C and are based on a novel hydrogen-permeable composite-metal membrane. Initial results from lifetime tests of the composite-metal membrane have been started. Figure 5 shows flux vs. time for a composite-metal membrane that was operated between 700[degree]C and 540[degree]C with a 100-psig hydrogen feed. This test was stopped after about 13 days when the gasket used to seal the membrane to the permeation cell failed. Two additional furnaces have been built for testing laboratory-scale membrane reactors and conducting lifetime tests. Construction of a vacuum brazing furnace has been completed. We have started evaluations of two promising joining methods-metal gaskets and brazed joints-for fabricating preprototype membrane modules.
- Research Organization:
- Bend Research, Inc., OR (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG03-91ER81228; FG03-91ER81229
- OSTI ID:
- 6987768
- Report Number(s):
- DOE/ER/81228-93/C0100; DOE/ER/81229--93/C0100; CONF-920951--45; ON: DE93002731
- Country of Publication:
- United States
- Language:
- English
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010402* -- Coal
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010404 -- Coal
Lignite
& Peat-- Gasification
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL GASIFICATION
DECOMPOSITION
DESULFURIZATION
ELEMENTS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HOT GAS CLEANUP
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
HYDROGEN SULFIDES
MEMBRANES
NONMETALS
PURIFICATION
PYROLYSIS
REMOVAL
SEPARATION PROCESSES
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
THERMOCHEMICAL PROCESSES