Influence of support structure on the permeation behavior of polyetherimide-derived carbon molecular sieve composite membrane

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• 作者：Hui-Hsin Tseng^a ; ^b ; Kaimin Shih^c ; Pei-Ting Shiu^d ; Ming-Yen Wey^d ; ^{mywey@dragon.nchu.edu.tw}
• 关键词：Ceramic support ; Sintering condition ; Carbon molecular sieve ; Gas separation ; Microstructure
• 刊名：Journal of Membrane Science
• 出版年：2012
• 期刊代码：55_03767388
• 类别：ch
• 出版时间：1 July, 2012
• 卷：405-406
• 期：Complete
• 页码：250-260
• 文件大小：1341 K

摘要

Polyetherimide (PEI) was used as polymeric precursor to prepare selective carbon molecular sieve (CMS) layer supported by a porous Al₂O₃ ceramic disk. The effects of the porous structure and surface roughness of the ceramic support on the interfacial adhesion and texture of the PEI/Al₂O₃-derived composite CMS membrane were investigated by modulating the sintering temperature and holding time. When the surface roughness of the ceramic support increased, the pore size and its distribution of the selective CMS layer were found to have shifted to the larger one and its roughness increased from the top to the bottom surface. This structure resulted in high permeability and low selectivity. Our results indicate that the porous structure of the ceramic support also played an important role in dominating the pore size and its distribution of the selective CMS layer, which influences the gas separation performance.