低共熔溶剂用于高效可逆捕集二氧化碳的研究  

Study on the Application of Deep Eutectic Solvents for High-Efficiency and Reversible Capture of Carbon Dioxide

作　　者：石升友 李水娥[1] 刘祥伟 Shi Shengyou;Li Shui-E;Liu Xiangwei(College of Materials and Metallurgy,Guizhou University,Guiyang,550025;Key Lab.of Metallurgical Engineering and Process of Energy Saving of Guizhou Province,Guiyang,550025)

机构地区：[1]贵州大学材料与冶金学院,贵州省冶金工程与过程节能重点实验室,贵阳550025

出　　处：《化学通报》2022年第6期746-750,共5页Chemistry

基　　金：贵州省科技攻关项目(黔科合支撑[2019]2164号)资助。

摘　　要：本文通过一步合成法合成了四种不同摩尔比的四乙基氯化胺-乙醇胺低共熔溶剂(TEAC-MEA DES)。红外光谱表征分析表明该DES是依靠氢键作用而形成的;DES的热稳定性高于MEA,且随着MEA的比例的增加而降低;对不同比例的DES进行了四次循环CO_(2)吸收-解吸实验,发现其吸收容量几乎不变,重复使用性能较好。在不同温度下计算了化学平衡常数,lnK对1/T线性拟合结果表明DES吸收CO_(2)的反应焓是负值,即吸收CO_(2)的反应是放热过程。该DES在吸收CO_(2)方面具有很大的潜力。In this paper, four different molar ratios of tetraethylamine chloride-ethanolamine deep eutectic solvents(TEAC-MEA DES) were synthesized by a one-step synthesis method. Infrared spectrum analysis shows that DES is formed by hydrogen bonding. The thermal stability of DES is higher than that of MEA, and it decreases with the increase of the proportion of MEA. The absorption capacity of the synthesized DES is almost unchanged after four cycles of absorption-desorption experiments, indicating its good reusability. The chemical equilibrium constant is calculated at different temperatures. The linear fitting result of lnK to 1/T shows that the reaction enthalpy of CO_(2)absorption by DES is negative, that is, the reaction of absorbing CO_(2)is an exothermic process. Compared with the reference value, it is found that this DES has great potential in absorbing CO_(2).

关 键 词：低共熔溶剂 CO_(2)可逆吸收 再生 热力学 

分 类 号：X701[环境科学与工程—环境工程] TQ413[化学工程]