膜科学与技术

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Preparation and gas separation performance of the asymmetric carbon membrane

Authors：

Chen Yongming,Ding Linghua,Jin Xin,Li Lin,Wang Tonghua

Units： State Key Laboratory of Fine Chemicals, Carbon Research Laboratory, R&D Center of Membrane Science, School of Chemical Engineering, Dalian University of Technology, Dalian 116023, China

KeyWords： phase inversion；asymmetric carbon membrane；structure；performance；gas separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2014,34(4):45-49

Abstract：

The asymmetric carbon membranes were prepared by the dry/wet phase inversion methods and then carbonization using PAA as the precursor, DMAc as the solvent and additive. The effects of the preparation technology parameters of phase inversion and carbonization on the microstructure and gas separation performance of asymmetric carbon membranes were investigated by SEM, XRD and variable volume- constant pressure method. The results showed that the preparation technology parameters of phase inversion and carbonization greatly affect the microstructure and gas separation performance of asymmetric carbon membranes. Controlling the proper concentration of casting solution and pre-evaporation time is beneficial to preparing the asymmetric carbon membranes with the high gas permeation flux and high selectivity. The microstructure of carbon membrane can be improved with the enhancement of carbonization temperature, which affects the gas separation performance of asymmetric carbon membrane. The SEM images indicate that the asymmetric carbon membrane is composed of the surface compact layer and porous support. Its surface is compact and free of defect. The microstructure of asymmetric carbon membranes is the disordered carbon structure according to XRD.

Funds：

国家自然科学基金面上与重点项目(20776024,20976021,20836006,21176036)、国家863项目(2009AA03Z215,2012AA03A611)

AuthorIntro：

陈永明(1987-)，男，山东枣庄，硕士生，从事炭膜材料的研究

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