Characterization of ultramicroporous carbon membranes with humidified feeds

Journal Article · Sun Jan 01 00:00:00 EST 1995 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00040a014· OSTI ID:6552975

Jones, C W; Koros, W J ^[1]

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1. Univ. of Texas, Austin, TX (United States)

Carbon molecular sieving membranes offer many advantages for difficult gas separations. The selectivities achieved with these membranes are much higher than those typically found with polymeric materials, without sacrificing productivity. While they perform very well with high-purity, dry feeds, the work in this paper will show that they are vulnerable to adverse effects from exposure to water vapor. Tests made with humidified air feeds ranging from 23 to 85% relative humidity show that some performance losses occur at all levels, with the losses increasing as the humidity level increases. In addition, most of the performance loss occurs in the initial period of exposure to water vapor. Despite this vulnerability, it was observed that significant membrane function was maintained at the lower levels of exposure. The effects of other factors, including feed pressure, membrane orientation, and the nature of the carbon itself, are also considered.

• OSTI ID: 6552975
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Vol. 34:1; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
MOLECULAR SIEVES
PERFORMANCE
DAMAGE
GASES
MOISTURE
PARAMETRIC ANALYSIS
PORE STRUCTURE
SEPARATION PROCESSES
ADSORBENTS
FLUIDS
MICROSTRUCTURE
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes
400105 - Separation Procedures