The impact of cation and anion of amino acid (AA) anion-functionalized ionic liquids (ILs) immobilized into a porous support on the CO₂ capture performance was investigated in dry or humidified gas flow conditions. 1-Ethyl-3-methylimidazolium ([EMIM]) cation and tetrabutylphosphonium ([P₄₄₄₄]) cation were used as a cations for synthesizing AAILs and compared, since they have different molecular structures and hydrophilicities from each other, affecting gas sorption behaviors. The experimental results showed that supported [P₄₄₄₄][AAs] had higher CO₂ capture capacities than the corresponding supported [EMIM][AAs] in units of mol/mol-AAIL under dry gas inlet, exhibiting the effect of cation on the CO₂ adsorption performance. Under humidified gas flow, supported [P₄₄₄₄][AAs] adsorbed much lower amounts of water vapor than supported [EMIM][AAs]. On the other hand, CO₂ capture capacities of both supported [EMIM][AAs] and [P₄₄₄₄][AAs] were slightly reduced in the presence of water vapor, due to much more rapid sorption of H₂O than CO₂.

中文翻译：

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阳离子和阴离子对固定在多孔载体上的氨基酸阴离子功能化离子液体的捕获CO _2的作用

研究了在干燥或加湿气流条件下固定在多孔载体上的阳离子和阴离子氨基酸（AA）阴离子官能化离子液体（ILs）对CO ₂捕集性能的影响。1-乙基-3-甲基咪唑鎓（[EMIM]）阳离子和四丁基phosph （[P ₄₄₄₄ ]）阳离子被用作合成AAIL的阳离子，并进行了比较，因为它们的分子结构和亲水性互不相同，从而影响了气体的吸附行为。实验结果表明，在干气入口下，以[mol / mol-AAIL]为单位，负载的[P ₄₄₄₄ ] [AAs]具有比相应的负载[EMIM] [AAs]更高的CO ₂捕集能力，表现出阳离子对CO的影响。_2个吸附性能。在加湿气流下，负载的[P ₄₄₄₄ ] [AAs]吸附的水蒸气量比负载的[EMIM] [AAs]低得多。另一方面，由于H ₂ O的吸附比CO ₂快得多，因此在存在水蒸气的情况下，负载的[EMIM] [AAs]和[P ₄₄₄₄ ] [AAs]的CO ₂捕集能力会略有降低。