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首页> 外文期刊>Chemical engineering journal >CO2/CH4 separation using flexible microporous organic polymers with expansion/shrinkage transformations during adsorption/desorption processes
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CO2/CH4 separation using flexible microporous organic polymers with expansion/shrinkage transformations during adsorption/desorption processes

机译：使用柔性微孔有机聚合物在吸附/解吸过程中使用柔性微孔有机聚合物分离膨胀/收缩变换

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摘要

CO2 capture and biogas stream purification are of significance to minimize their effect on the global climate change. Usually, flexible metal-organic frameworks (MOFs) could show responsive adsorption for a specific guest. However, in this work, a flexible microporous organic polymer (MOP), BOP-1, was synthesized via in- tentionally selecting two functional groups (Cl and NH2 moieties). Results show that BOP-1 has a higher uptake of CO2 under 1 bar, i.e., 3.94 and 1.60 mmol/g at 273 and 298 K, respectively. Especially, at 273 K, BOP-1 shows an abrupt transformation over CO2 adsorption and exhibits a high CO2/CH4 selectivity of 568 at 0.02 bar. Both experimental and theoretical methods reveal that the flexible -CH2-NH- linker within the framework plays a critical role in dominating CO2 binding and contributing the flexibility of host frameworks. Our findings could open a new possibility to tailor the function and flexibility of MOPs and to achieve their specific response to targets for the practical application in adsorption.
机译：CO2捕获和沼气流净化具有重要意义，以最大限度地减少对全球气候变化的影响。通常，柔性金属 - 有机框架（MOF）可以对特定客人的敏感性吸附。然而，在该工作中，通过致死选择两个官能团（Cl和NH 2部分）合成柔性微孔有机聚合物（MOP），BOP-1。结果表明，BOP-1分别在273和298 k下的1巴，即3.94和1.60mmol / g的1℃下具有更高的CO2吸收。特别是，在273 k下，BOP-1显示出通过CO 2吸附的突然转化，并且在0.02巴的高CO 2 / CH 4选择性为568。两种实验和理论方法都揭示了框架内的柔性-CH2-NH-连接器在主导CO2结合和有助于主框架的灵活性中起着关键作用。我们的调查结果可以开辟了一种新的可能性来定制MOP的功能和灵活性，并实现对吸附实际应用的目标的特定反应。

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