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
Effects of Diatomaceous Earth Addition on the Microstructure and Gas Permeation of Carbon Molecular Sieving Membranes
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论文类型:期刊论文
发表时间:2018-08-07
发表刊物:CHEMISTRYSELECT
收录刊物:SCIE
卷号:3
期号:29
页面范围:8428-8435
ISSN号:2365-6549
关键字:Carbon membranes; Diatomite; Gas separation; Polyimide; Support
摘要:Carbon molecular sieving (CMS) membranes were successfully prepared using polyimide as precursor and diatomaceous earth (DE) as dopants through the processes of membrane formation and pyrolysis. The thermal stability, surface functional groups, microstructure and morphology of membrane samples were characterized by the thermogravlmetric analysis. X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscope, respectively. The effects of DE dosage, support and permeation temperature on gas permeation of the CMS membranes were investigated. The results show that the addition of DE improves the thermal stability of precursor and the graphitlzation degree of derived CMS membranes. The incorporation of DE increases the gas permeability and microporous structure of CMS membranes at a loss of selectivity. The permeability of CMS membranes increases with elevating the permeation temperature. When DE composite CMS membranes are prepared by adding 0.4% DE in starting materials on plate supports, the optimum gas permeability reaches to 998.7 Barrer for H-2, 262.3 Barrer for CO2, 231.6 Barrer for O-2, along with the selectivity of 20.7 for H-2/N-2, 5.4 for CO2/N-2 and 4.8 for O-2/N-2.