Is it Always Chemical When Amino Groups Come Across CO2? Anion-Anion-Interaction-Induced Inhibition of Chemical Adsorption.,The Journal of Physical Chemistry B

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Is it Always Chemical When Amino Groups Come Across CO2? Anion-Anion-Interaction-Induced Inhibition of Chemical Adsorption.
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2019-07-18 , DOI: 10.1021/acs.jpcb.9b03210
Zhang Zhang ₁ , Lei Zhang ₁ , Ling He ₁ , Wen-Li Yuan ₁ , Dingguo Xu ₁ , Guo-Hong Tao ₁

Affiliation

Amino-functionalized ionic liquids (IL) are often applied to fix CO2. However, as far as we know, none of them have ever been reported to exhibit considerable physical CO2 capture. Herein, we describe an amino-functionalized room-temperature ionic liquid, 1-butyl-3-methylimidazolium 3-amino-1H-1,2,4-triazolate ([Bmim][ATZ]), with an unusual ultrafast physical CO2 capture at room temperature and atmospheric pressure. Within the time needed for a chemisorbent to reach an equilibrium, 15 adsorption and desorption cycles are finished for [Bmim][ATZ], with an accumulative molar ratio of up to 2.04. The CO2/IL ratio for one adsorption process reaches 0.14, which is 4 times the highest recorded physical CO2 solubility by [thtdp][Cl] (trihexyltetradecylphosphonium chloride). The first theoretical study on anion-anion interactions of ionic liquids is reported, which rationalizes the inhibition of chemical adsorption. These results provide a new perspective on the aspect of CO2 capture, as well as designing of ionic liquids.

中文翻译：

当氨基基团跨越CO2时，它总是化学的吗？阴离子-阴离子相互作用诱导的化学吸附抑制作用。

氨基官能化的离子液体（IL）通常用于固定CO2。但是，据我们所知，还没有人报告它们表现出可观的物理二氧化碳捕集能力。在这里，我们描述了一种氨基官能化的室温离子液体，1-丁基-3-甲基咪唑鎓3-氨基-1H-1,2,4-三唑酸酯（[Bmim] [ATZ]），具有超快的物理CO2捕获能力在室温和大气压下。在化学吸附剂达到平衡所需的时间内，[Bmim] [ATZ]完成了15个吸附和解吸循环，累积摩尔比高达2.04。一个吸附过程的CO2 / IL比达到0.14，这是[thtdp] [Cl]（三己基十四烷基氯化chloride）记录的最高物理CO2溶解度的4倍。报道了关于离子液体的阴离子-阴离子相互作用的第一理论研究，其合理化了对化学吸附的抑制。这些结果为CO2捕集以及离子液体的设计提供了新的视角。

更新日期：2019-07-18

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