个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 现任大连理工大学化工学院教授、博士生导师。同时担任“膜科学与技术”期刊编委,膜学会理事(筹),膜工业协会工程与应用专业委员会及特种分离膜专业委员会委员、中国兵工学会活性炭测试分析与应用研究分会委员等。
性别:男
毕业院校:大连工学院
学位:硕士
所在单位:化工学院
学科:化学工艺. 膜科学与技术. 功能材料化学与化工
办公地点:化工综合楼A201
联系方式:微信/电话 13500711370
电子邮箱:wangth@dlut.edu.cn
The positive/negative effects of bentonite on O-2/N-2 permeation of carbon molecular sieving membranes
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论文类型:期刊论文
发表时间:2019-09-01
发表刊物:MICROPOROUS AND MESOPOROUS MATERIALS
收录刊物:SCIE、EI
卷号:285
页面范围:142-149
ISSN号:1387-1811
关键字:Polyimide; Carbon membranes; Support; Bentonite; Gas permeation
摘要:In this work, bentonite (BT) was first developed as additives to modify carbon molecular sieving (CMS) membranes. The membrane samples were characterized by the techniques of thermogravimetric analysis, differential scanning calorimetry, infrared spectroscopy, X-ray diffraction, nitrogen adsorption, scanning electron microscope and transmission electron microscopy. The effects of BT amount, transmembrane pressure and permeation temperature on the microstructure and gas permeation of CMS membranes were investigated. It finds that the incorporation of BT improves the thermal stability of precursors and the microporous volume of CMS membranes. The graphitization degree and structural compactness of the CMS membranes increase with elevating the BT amount. At the same time, the gas permeability first increases then decreases. In comparison, BT-doped CMS membranes are more permeable for oxygen and nitrogen. Moreover, the permeability of CMS membranes increases by rising permeation temperature or reducing transmembrane pressure. The CMS membranes can directly enrich the mole fraction of O-2 to 78% from compressed air at one time.