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Study on preparation of fixed carrier composite membrane based on ZIF-8 and CO2 separation performance

Authors： FENG Xiaoquan1,2, ZHAO Qianqian1,2, ZHANG Yatao 1,2

Units： 1School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001 China; 2 Zhengzhou Key Laboratory of Advanced Separation Technology, Zhengzhou 450001 China

KeyWords： Drop-coating, ZIF-8, fixed-carrier, composite membrane, CO2 separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(4):35-41

Abstract：

The preparation of CO2 separation membrane with high efficiency is one of unremitting pursuits and hot topics for researchers. PSf ultrafiltration membrane was used as the bottom membrane and PDMS was coated on the PSf bottom membrane as the "gutter layer", ZIF-8, a crystalline porous material, was introduced to prepare PVAm-PEA separate functional layer for efficient separation of CO2/N2 by drop-coating method. Through a series of characterization and tests, the effects of ZIF-8 and content on the gas permeation of CO2/N2 were investigated. Results showed that the surface morphology of the composite film was coarser than that of the blank film, the CO2 permeation reduces 43% and the separation coefficient of CO2/N2 increases 220%. The content of ZIF-8 is 0.05wt%, which the maximum separation factor can up to be 202, measured at 0.1MPa, and the maximum permeation rate of CO2 can also reach 59 GPU.

Funds：

国家自然科学基金项目（U1704139）

AuthorIntro：

冯孝权(1989-02-28)，男，河南濮阳人，博士研究生，从事膜分离技术的研究。

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