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Preparation and gas separation performance of Cu-Zn-Al
multi-metal oxides hybrid carbon membranes

Authors： LU Xinyuan1, ZHUANG Dianzheng2, ZHANG Bing1, JIANG Yuan1, WANG Tonghua3, SONG Enjun4

Units： 1. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; 2. School of Chemical Equipment, Shenyang University of Technology, Liaoyang 111003, China; 3. School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China; 4. Oxiran Holding Group Co., Ltd., Liaoyang 111003, China

KeyWords： polyimide; doping agent; carbon membranes; gas separation performance

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2025,45(1):40-47

Abstract：

Hybrid carbon membranes for gas separation were prepared by the processes of membrane formation and carbonization using polyimide as precursor and Cu-Zn-Al (CZA) multi-metal oxides as dopant. The thermal stability of the precursors, surface functional groups, microstructure, micromorphology, surface element distribution and pore structure of carbon membranes were characterized by the techniques of thermogravimetry, infrared spectroscopy, X-ray diffraction, scanning electron microscope, energy spectroscopy and nitrogen adsorption analysis, respectively. The effect of the CZA content on the gas separation performance of carbon membranes was mainly investigated. The results showed that the introduction of CZA affected the thermal stability of the precursor to a certain extent and densified the microstructure of carbon membranes. The variation in changing the amount of CZA amount could effectively regulate the gas separation performance of the carbon membrane. The optimal separation performance of the prepared hybrid carbon membranes is achieved when the doping mass fraction of CZA was 0.1%, i.e., H2 and O2 permeabilities could correspondingly reach to 3 746.15 and 610.15 Barrer, together with the selectivity of H2/N2 and O2/N2 being 42.8 and 7.0, respectively.

Funds：

国家自然科学基金项目（20906063）；辽宁省自然科学基金项目(2021-MS-238)

AuthorIntro：

陆新元（1996-），男，辽宁阜新人，硕士研究生，研究方向为气体分离炭膜及应用.

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