Indexed by:期刊论文
Date of Publication:2018-03-01
Journal:JOURNAL OF MEMBRANE SCIENCE
Included Journals:SCIE、EI
Volume:549
Page Number:403-410
ISSN No.:0376-7388
Key Words:Gas membrane separation; Tetrafluoroethylene; Polymerization purge; Pseudo-steady process; Process optimization
Abstract:In tetrafluoroethylene (TFE) batch polymerization, H-2 is utilized to stabilize pressure and control reaction degree. TFE lost in the purge can account for about 6.0% of the loaded monomer. In this work, membrane-based separation system was presented to effectually reduce TFE loss. Polyimide asymmetric membrane with J(H2) up to 196 GPU and alpha(H2/TFE) higher than 1680 was developed for the separation. A pseudo-steady process was customized to sufficiently complete TFE recovery within the 30-min idle period after batch polymerization. With the procedure that H-2-enriched permeate is compressed back into the reactor, it is succeeded to overcome the limits that the purge is gradually falling in pressure and the TFE-enriched stream is hazardous in compression. In this instance, TFE recovery ratio was increased to about 90%. For a 5.0-kt/a TFE polymerization unit, the investment for the separation system is about 2.56 x 10(5) USD, the running payout is less than 4.35 x 10(4) USD/a, and meanwhile the annual gross profit can be up to 3.126 x 10(6) USD. On the whole, gas membrane separation is a promising technique to reduce TFE loss in the batch polymerization processes.
Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Main positions:化工学院副院长
Other Post:Vice director of Engineering Laboratory of Liaoning Province
Gender:Male
Alma Mater:Tianjin University
Degree:Doctoral Degree
School/Department:School of Chemical Engineering
Discipline:Chemical Engineering. Membrane Science and Technology. Water Science and Technology
Business Address:大连理工大学西部校区化工实验楼D405
Contact Information:Tel:0411-84986291
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