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Preparation of mixed matrix membrane with modified graphene doped polyimide for CO2 / N2 separation

Authors： Shang Jinghong，ZangYihua，Luo Linjun，Quan Kaidong，Sheng Chunguang，Liu Zongyuan，Li Yang，Zhang Shuyou

Units： 1.Tianjin Branch of CNOOC (China) Co., Ltd，Tianjin，300450, China；2.CenerTech Tianjin Chemical Research and Design Institute Co., Ltd., Tianjin 300131,China；3.PCOC NO.1 Oil Production Plant，Yan’an 716000, Shanxi，China

KeyWords： polyimide; CO2/N2 gas separation; graphene oxide; reduced graphene oxide; mixed matrix membrane

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(3):98-104

Abstract：

A large amount of CO2 greenhouse gas was produced by offshore oil production platform daily. The separation and capture of CO2 greenhouse gas and its reinjection into the formation can effectively improve the liquidity of crude oil, increase the yield of crude oil, and produce considerable economic benefits and environmental protection and social benefits. However, due to the constraints of technology and cost, high-purity separation of CO2 has become one of the research hotspots. Polyimide is the most valuable gas separation membrane material at present. Because of Robeson upper limitation, the commercially available polymeric membranes often have either high permeability or high selectivity, but not two together. In this paper, polyimide was doped with self-made graphene oxide and reduced graphene oxide to prepare mixed matrix membrane, and the experimental study of CO2 / N2 gas separation was carried out. The results show that the separation performance of the prepared graphene oxide doped polyimide mixed matrix membrane (PI-GO) and reduced graphene oxide doped polyimide mixed matrix membrane (PI-rGO) is significantly improved compared with the pure polyimide membrane; the permeability coefficient and separation factor of the PI-rGO are increased by 13.52% and 24.34% respectively compared with the dry and wet gas permeability experiments.

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AuthorIntro：

尚景宏（1977-），男，河北沧州人，研究方向为海洋石油工程，

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