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SORPTION, DIFFUSION AND PERMEATION OF 1,1,1- TRICHLOROETHANE THROUGH ADSORBENT-FILLED POLYMERIC MEMBRANES
Wenchang, J., S K. Sikdar*, AND S. T. Hwang. SORPTION, DIFFUSION AND PERMEATION OF 1,1,1- TRICHLOROETHANE THROUGH ADSORBENT-FILLED POLYMERIC MEMBRANES. doi:10.1016/0376-738, JOURNAL OF MEMBRANE SCIENCE. Elsevier BV, AMSTERDAM, Netherlands, 103(3):243-255, (1995).
Addition of hydrophobic absorbents such as activated carbon into polymeric mebranes increased the sorption capacity for 1,1,1-trichloroethane premeability of the mebranes used in the Pervaporation mode. Water permeability also increased for all filled membranes due to increased water sorption. The intrimic separation factor for trichloroethane, however, increased only for membranes filled with activated carbon. It did not change for mebranes filled with a carbonaceous adsorbent mde by polymer pyrolysis. The solubility of trichloroethane in the filled membranes was measured directly by a "purge and trap" method. The trichloroethane diffusivities in the filled membranes were calculated from the solubility and permeation data or determined desorption expereiments. It was shown from these results that the enhancement in trichloroethane selectivity and permeability for the activated carbon filled membrane was mainly due to the increase of trichloroethane solubility.
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Record Details:Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Organization:U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL RISK MANAGEMENT RESEARCH LABORATORY
SUSTAINABLE TECHNOLOGY DIVISION