A solid amine adsorbent was prepared by modifying a porous polystyrene resin (XAD-4) with chloroacetyl chloride through a Friedel-Crafts acylation reaction, followed by aminating with tetraethylenepentamine (TEPA). The adsorption behavior of CO2 from a simulated flue gas on the solid amine adsorbent was evaluated. Factors that could determine the CO2 adsorption performance of the adsorbents such as amine species, adsorption temperature, and moisture were investigated. The experimental results showed that the solid amine adsorbent modified with TEPA (XAD-4-TEPA), which had a longer chain, showed an amine efficiency superior to the other two amine species with shorter chains. The CO2 adsorption capacity decreased obviously as the temperature increased because the reaction between CO2 and amine groups was an exothermic reaction, and its adsorption amount reached 1.7 mmol/g at 10 degrees C in dry conditions. The existence of water could significantly increase the CO2 adsorption amount of the adsorbent by promoting the chemical adsorption of CO2 on XAD-4-TEPA. The adsorbent kept almost the same adsorption amount after 10 cycles of adsorption-desorption. All of these results indicated that amine-functionalized XAD-4 resin was a promising CO2 adsorbent. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45046.
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机译：将多孔聚苯乙烯树脂（XAD-4）与氯乙酰氯进行傅-克联酰化反应改性，再用四乙烯五胺（TEPA）胺化，制备固体胺吸附剂。评价了模拟烟气CO2对固体胺吸附剂的吸附行为。研究了胺类、吸附温度、水分等影响吸附剂CO2吸附性能的因素。实验结果表明，经TEPA改性的固体胺吸附剂（XAD-4-TEPA）具有较长链的胺效率，其胺效率优于其他两种链较短的胺类。CO2与胺基的反应为放热反应，CO2吸附量随温度升高而明显降低，在干燥条件下，CO2吸附量在10°C时达到1.7 mmol/g。水的存在可以通过促进CO2在XAD-4-TEPA上的化学吸附，显著增加吸附剂的CO2吸附量。吸附剂在吸附-脱附10次循环后保持几乎相同的吸附量。这些结果表明，胺官能化XAD-4树脂是一种很有前途的CO2吸附剂。（c） 2017 Wiley Periodicals， Inc. J. Appl. Polym.科学 2017， 134， 45046.
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