A study on the preparation and gas permeation of porous alumina supports

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399508013901· OSTI ID:273844

Huang, Ting-Chia; Chen, Huey-Ing ^[1]

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1. National Cheng Kung Univ., Taiwan (China)

The preparation and gas permeation of porous alumina supports were studied. The influence of the amount of PVA on the properties of the alumina slips, microstructure of the supports, and gas permeation were investigated. The experimental results show that the addition of PVA in the preparation process is useful for controlling the porosity of the supports without significantly changing other microstructural properties. Permeation measurements of H{sub 2}, He, Ch{sub 4}, N{sub 2}, O{sub 2}, and CO{sub 2} showed that gas transport through various supports under low transmembrane pressures (100-220 kPa) at room temperature (26.5{degrees}C) was in the transition region, which combined the Knudsen diffusion and Poiseuille flow. The average radii of active pores for the supports, calculated from the gas permeability method, were compared with those measured by mercury porosimetry. The porosity-tortuosity factors and the tortuosity factors of the supports were also estimated and are discussed.

• OSTI ID: 273844
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 10 Vol. 30; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
99 GENERAL AND MISCELLANEOUS
ALUMINIUM OXIDES
CARBON DIOXIDE
CATALYST SUPPORTS
DIFFUSION
GASES
HELIUM
HYDROGEN
KNUDSEN FLOW
METHANE
MICROSTRUCTURE
NITROGEN
OXYGEN
PERMEABILITY
POROSITY