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EMERGING TECHNOLOGY BULLETIN: VOLATILE ORGANIC COMPOUND REMOVAL FROM AIR STREAMS BY MEMBRANES SEPARATION MEMBRANE TECHNOLOGY AND RESEARCH, INC.
Citation:
de Percin*, P R. EMERGING TECHNOLOGY BULLETIN: VOLATILE ORGANIC COMPOUND REMOVAL FROM AIR STREAMS BY MEMBRANES SEPARATION MEMBRANE TECHNOLOGY AND RESEARCH, INC. EPA/540/F-94/503, 1994.
Impact/Purpose:
information
Description:
This membrane separation technology developed by Membrane Technology and Research (MTR), Incorporated, is designed to remove volatile organic compounds (VOCs) from contaminated air streams. In the process, organic vapor-laden air contacts one side of a membrane that is permeable to organic vapors but relatively impermeable to air. A partial vacuum, applied to the other side, draws the organic vapor through the membrane. The permeate vapor is then compressed and condensed to recover the organic fraction. The purified airstream is removed on the feed side. The MTR membrane unit is a spirally-wound module comprised of a perforated pipe bound within the wound membrane and spacers. Feed gas flows between the membrane leaves, with the preferentially permeable component spiralling inward to connect in the central permeate collection pipe. The remainder of the feed flows across the membrane surface and exits as the residue. In the membrane separation system pilot unit, VOCs in a compressed air stream enter the first of two membrane stages (Figure 1). This first stage concentrates most of the VOCs into the permeate stream. The permeate is recompressed and condensed, normally producing only water from the atmosphere. The bleed stream leaving the condenser enters the second membrane stage reducing the VOC content to a concentration close to that of the first stage. The permeate from this stage is concentrated enough with VOCs to allow for its condensation. The bleed stream from this condenser is recirculated back to the second stage membrane unit. In its entirety, the system separates the VOC-laden air stream into a VOC-depleted stream and condensed liquid VOC.
URLs/Downloads:
EMERGING TECHNOLOGY BULLETIN: VOLATILE ORGANIC COMPOUND REMOVAL FROM AIR STREAMS BY MEMBRANES SEPARATION MEMBRANE TECHNOLOGY AND RESEARCH, INC.540_F-94_503.PDF (PDF, NA pp, 1 KB, about PDF)