膜科学与技术

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Preparation and characterization of hollow fiber supported carbon membrane

Authors： PENG Li, WANG Xing, TANG Guoqiang, WANG Boxuan, GU Xuehong

Units： State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing, 211816)

KeyWords： Supported carbon membrane; Polyfurfuryl alcohol; Mesoporous carbon silicon; Hollow fiber

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(5):51-59

Abstract：

Hollow fiber supported carbon membranes were prepared on four-channel α-Al2O3 hollow fibers with mesoporous carbon silicon composite as the intermediate layer and polyfurfuryl alcohol prepared by self-polymerization of furfuryl alcohol with oxalic acid and iodine as the catalyst respectively as the carbon membrane precursor. The morphology，physical properties of the intermediate layer and supporting carbon membrane and the pyrolysis process of polyfurfuryl alcohol were studied by using Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier infrared spectroscopy( FT-IR) and thermogravimetric (TG). The ultrafiltration performance of the intermediate layer and the gas separation performance of the hollow fiber supported carbon membrane were tested. The results showed that the carbon membrane can be easily peeled off the α-Al2O3 hollow fiber support without the mesoporous carbon silicon composite intermediate layer. The mesoporous intermediate layer can effectively reduce the average pore size of the support surface to 5 nm, and form strong adherence between carbon membrane and the support. At 25 °C and 0.2 MPa, the permeability of H2, CO2, O2, N2 and CH4 of the supporting carbon membrane prepared with mesoporous intermediate layer under the optimized preparation condition were 59.0, 1.22, 0.82, 0.23 and 0.13×10-11 mol/(m2·s·Pa), and the selectivity of H2/N2, CO2/N2 and O2/N2 were 256, 5.30 and 3.57.

Funds：

国家重点研发计划（2018YFB1501701），国家自然科学基金（批准号：21776128）及江苏省“333”高层次人才项目资助

AuthorIntro：

彭莉（1976-11），女，重庆人，副教授，博士，从事无机膜的制备与应用研究，Email: lipeng2016@njtech.edu.cn

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