Hollow fiber inorganic membranes for gas separations

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399208018863· OSTI ID:5221783

Way, J D ^[1]; Roberts, D L ^[2]

---

1. Oregon State Univ., Corvallis (United States)
2. SRI Int., Menlo Park, CA (United States)

There is increasing interest to develop high temperature, high pressure membrane technology to perform a variety of gas separations such as acid gas removal from synthetic gas streams found in coal-fired power generation systems, hydrogen recovery in petrochemical production, and CO/H{sub 2} ratio adjustment in the production of oxychemicals. Pure gas permeabilities of He, H{sub 2}, CO{sub 2}, N{sub 2}, and CO were measured for microporous silica hollow fiber membranes as a function of temperature. The transport mechanism for gas permeation is clearly non-Knudsen since several heavier gases permeate faster then lighter gases. An excellent correlation is obtained between permeability and kinetic diameter of the penetrant. The proposed mass transfer mechanism is a combination of surface diffusion and molecular sieving. High ideal separation factors (permeability ratios) are observed at 343 K for H{sub 2}/N{sub 2} and H{sub 2}/CO of 163 62.4, respectively, which compare very favorably with polymeric and molecular sieve gas separation membranes.

• OSTI ID: 5221783
• Journal Information: Separation Science and Technology; (United States), Vol. 27:1; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
08 HYDROGEN
CARBON DIOXIDE
MEMBRANE TRANSPORT
CARBON MONOXIDE
HELIUM
HYDROGEN
MEMBRANES
PERFORMANCE TESTING
NITROGEN
COAL
COAL GAS
DIFFUSION
EXPERIMENTAL DATA
FIBERS
FLOWSHEETS
FOSSIL-FUEL POWER PLANTS
HYDROGEN PRODUCTION
MASS TRANSFER
MOLECULAR SIEVES
MOLECULAR WEIGHT
PERMEABILITY
SEPARATION PROCESSES
SILICON OXIDES
SIZE
TEMPERATURE DEPENDENCE
ADSORBENTS
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
DATA
DIAGRAMS
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
INFORMATION
MATERIALS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
PYROLYSIS PRODUCTS
RARE GASES
SILICON COMPOUNDS
TESTING
THERMAL POWER PLANTS
010402* - Coal
Lignite
& Peat- Purification & Upgrading
080100 - Hydrogen- Production