肖武

个人信息Personal Information

副教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:化工学院

学科:化学工程

办公地点:大连理工大学西部校区化工实验楼D-405

联系方式:wuxiao@dlut.edu.cn

电子邮箱:wuxiao@dlut.edu.cn

扫描关注

论文成果

当前位置: 中文主页 >> 科学研究 >> 论文成果

Highly efficient tetrafluoroethylene recovery for batch polymerization system: Membrane preparation and process development

点击次数:

论文类型:期刊论文

发表时间:2018-03-01

发表刊物:JOURNAL OF MEMBRANE SCIENCE

收录刊物:SCIE、EI

卷号:549

页面范围:403-410

ISSN号:0376-7388

关键字:Gas membrane separation; Tetrafluoroethylene; Polymerization purge; Pseudo-steady process; Process optimization

摘要: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.