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Cardo-type random co-polyimide membranes for high pressure pure and mixed sour gas feed separations
Journal of Membrane Science ( IF 9.5 ) Pub Date : 2018-03-01 , DOI: 10.1016/j.memsci.2017.10.063
Garba O. Yahaya , Ilham Mokhtari , Afnan A. Alghannam , Seung-Hak Choi , Husnul Maab , Ahmad A. Bahamdan

Abstract A series of aromatic random co-polyimide membranes based on 6FDA-Durene/CARDO backbone with varying content of CARDO moiety (3:1; 1:1 and 1:3) were synthesized for enhanced acid gas separation performance. Gas transport properties of pure and mixed gas streams consisting of H2S, CO2, He, CH4, N2 and C2H6 through the dense films of the co-polyimide were studied. Mixed sweet gas tests were done with feeds containing no H2S up to 55 bar, while mixed sour gas measurements were conducted with feeds containing H2S up to 34 bar for 10% H2S and 20% H2S. The membranes exhibit very attractive pure gas transport properties, as CO2 permeability and CO2/CH4 selectivity are up to 323 barrer and 35 respectively. Furthermore, the transport properties of sour gas mixture consisting of five gases were also found attractive, as the CO2/CH4 and H2S/CH4 ideal selectivities are in the range of 18–23 and 19–21 respectively; while CO2 and H2S permeabilities are in the range of 38–51 and 40–47 barrers respectively for 20% H2S in the gas mixture. These values and separation performance exhibited by the co-polyimide are comparable and very competitive even, as compared to the values obtained in some of the high performance polymeric membranes that have been reported in the literature. The stability of the random co-polyimide 6FDA-Durene/CARDO membrane under these aggressive environments is quite remarkable.

中文翻译:

用于高压纯和混合酸性气体进料分离的 Cardo 型无规共聚聚酰亚胺膜

摘要 合成了一系列基于 6FDA-Durene/CARDO 骨架的具有不同 CARDO 基团含量(3:1;1:1 和 1:3)的芳族无规共聚聚酰亚胺膜,以提高酸性气体分离性能。研究了由 H2S、CO2、He、CH4、N2 和 C2H6 组成的纯气流和混合气流通过共聚酰亚胺的致密薄膜的气体传输特性。混合含硫气体测试是使用不含 H2S 的进料进行的,最高可达 55 bar,而混合酸性气体的测量则是使用含 H2S 最高 34 bar 的进料,用于 10% H2S 和 20% H2S。由于 CO2 渗透性和 CO2/CH4 选择性分别高达 323 barrer 和 35 barrer,该膜表现出非常有吸引力的纯气体传输特性。此外,还发现由五种气体组成的酸性气体混合物的传输特性也很有吸引力,因为 CO2/CH4 和 H2S/CH4 的理想选择性分别在 18-23 和 19-21 的范围内;而对于气体混合物中的 20% H2S,CO2 和 H2S 的渗透率分别在 38-51 和 40-47 barrers 的范围内。与在文献中报道的一些高性能聚合物膜中获得的值相比,共聚酰亚胺表现出的这些值和分离性能甚至具有可比性并且非常具有竞争力。无规共聚聚酰亚胺 6FDA-Durene/CARDO 膜在这些侵蚀性环境下的稳定性非常出色。与在文献中报道的一些高性能聚合物膜中获得的值相比,共聚酰亚胺表现出的这些值和分离性能甚至具有可比性并且非常具有竞争力。无规共聚聚酰亚胺 6FDA-Durene/CARDO 膜在这些侵蚀性环境下的稳定性非常出色。与在文献中报道的一些高性能聚合物膜中获得的值相比,共聚酰亚胺表现出的这些值和分离性能甚至具有可比性并且非常具有竞争力。无规共聚聚酰亚胺 6FDA-Durene/CARDO 膜在这些侵蚀性环境下的稳定性非常出色。
更新日期:2018-03-01
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