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首页> 外文期刊>Journal of Applied Polymer Science >Role of aromatic ring spacer in homo-coupled conjugated microporous polymers in selective CO2 separation
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Role of aromatic ring spacer in homo-coupled conjugated microporous polymers in selective CO2 separation

机译：Role of aromatic ring spacer in homo-coupled conjugated microporous polymers in selective CO2 separation

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To obtain high purity of natural and flue gases, the development of adsorbent with appropriate structure is of great importance. As a result, there is an urgent need to investigate the role of aromatic ring spacer in adsorbent in high CO2 capture. For this, conjugated microporous polymers (CMPs) were fabricated through homo-coupling reaction of 1,3,5-tribromobenzene (TBB) and 1,3,5-triethynylbenzene (TEB). It was observed that, CMP-A (without spacer) demonstrates high CO2 uptake over CMP-B (with spacer). CMP-A demonstrates CO2 uptake of 212.1 mg g(-1) which is obviously higher than benchmark adsorbents under the analogous conditions. In addition, the obtained CO2 uptake is also higher than metal-organic framework (MOF) and energy-intensive carbon-based adsorbents. CMP-A revealed high CO2/N-2 selectivity (78.5) over CMP-B (56.1). It was noticed that CMP-A demonstrates excellent CO2/CH4 and CO2/N-2 selectivity over CMP-B at 273 K. This is mainly due to appropriate structure in CMP-A (without spacer). The obtained CO2/N-2 selectivity (78.5) is higher than recently reported adsorbents under the similar experimental conditions.

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