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A polyethylene glycol (PEG) – polyethersulfone (PES)/multi-walled carbon nanotubes (MWCNTs) polymer blend mixed matrix membrane for CO 2 /N 2 separation
Journal of Polymer Research ( IF 2.8 ) Pub Date : 2021-01-05 , DOI: 10.1007/s10965-020-02361-5
Kar Kit Wong , Zeinab Abbas Jawad , Bridgid Lai Fui Chin

Recently, carbon capture utilizing membrane technology has received much attention to limit the adverse effect caused by rising carbon dioxide (CO2) concentration in the atmosphere as they are less energy intensive and more environmentally friendly. Among the type of membranes, mixed matrix membranes (MMMs) has shown promising gas separation results. In this study, polymer blend MMMs were fabricated using polyethylene glycol (PEG), polyethersulfone (PES), multi-walled carbon nanotubes (MWCNTs) and solvent N,N-dimethylformamide (DMF) using wet phase-inversion technique. Results shown that functionalized MWCNTs (MWCNTs-F) were able to enhance gas separation performance of MMM. Furthermore, the effect of MWCNTs-F loading (0.005 wt% to 0.03 wt%) and polymer composition (PEG-PES weight ratio of 20:20, 30:10 and 32:8) were also studied. Results shown both parameters affect the gas separation performance of MMMs. The best performance in term of CO2/Nitrogen (N2) selectivity is found to be 1.235 ± 0.002 for MMM fabricated with 30 wt% PEG, 10 wt% PES and 0.02 wt% MWCNTs-F. In addition, MMM synthesized with PEG-PES weight ratio of 20:20 can withstand a pressure of 1.2 bar, indicating high mechanical strength. Hence, it is applicable in the post combustion carbon capture industry as typical flue gas has a pressure of 1.01 bar.



中文翻译:

用于CO 2 / N 2分离的聚乙二醇(PEG)–聚醚砜(PES)/多壁碳纳米管(MWCNTs)聚合物共混混合膜

近年来,利用膜技术进行碳捕集受到了广泛关注,以限制由二氧化碳(CO 2)集中在大气中,因为它们消耗的能源较少,对环境更友好。在各种类型的膜中,混合基质膜(MMM)已显示出令人满意的气体分离结果。在这项研究中,使用湿相转化技术,使用聚乙二醇(PEG),聚醚砜(PES),多壁碳纳米管(MWCNT)和溶剂N,N-二甲基甲酰胺(DMF)制备聚合物共混物MMM。结果表明,功能化的MWCNTs(MWCNTs-F)能够增强MMM的气体分离性能。此外,还研究了MWCNTs-F负载量(0.005重量%至0.03重量%)和聚合物组成(PEG-PES重量比为20:20、30:10和32:8)的影响。结果表明,这两个参数都会影响MMM的气体分离性能。以CO 2 /氮气(N2)发现用30重量%的PEG,10重量%的PES和0.02重量%的MWCNTs-F制造的MMM的选择性为1.235±0.002。此外,以PEG-PES重量比为20:20合成的MMM可以承受1.2 bar的压力,表明具有较高的机械强度。因此,由于典型的烟道气的压力为1.01 bar,因此可应用于后燃烧碳捕集行业。

更新日期:2021-01-05
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