基于三元甜菜碱的低共熔溶剂捕集二氧化碳的研究
Study on Carbon Dioxide Capture Using Ternary Betaine-Based Deep Eutectic Solvents.
作者信息
Liu Chengfang, Zhou Xuzhong, Guo Shihong, Li Shuie
机构信息
Key Laboratory of Metallurgical Engineering and Process of Energy Saving of Guizhou Province, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, P.R. China.
Guizhou University of Finance and Economics, Guiyang 550025, P.R. China.
出版信息
ACS Omega. 2024 Dec 17;9(52):51031-51039. doi: 10.1021/acsomega.4c05705. eCollection 2024 Dec 31.
The application of existing ternary betaine (Be)-based deep eutectic solvents (DESs) faces inevitable limitations due to the low regenerability and water absorption capability of the DESs. In this study, three ternary Be-based DESs with different molar ratios were prepared by adding the promoter diethanolamine (DEA) to the binary system of Be and ethylene glycol (EG). The effects of DEA, temperature, and flow rate on CO absorption by the Be-based DESs were then investigated. At a molar ratio of 1:5:8 (Be:EG:DEA), the CO absorption capacity reached 0.207 g CO/g DES at an absorption temperature of 30 °C and a gas flow rate of 50 mL/min. The addition of water with different contents triggered DES dissolution, forming a ternary Be-based DES + water system. The added water inhibited the absorption of CO by the ternary Be-based DESs. Evaluation of the regenerability of the ternary Be-based DESs showed that their CO absorption capacities remained above 0.176 g CO/g DES after five cycles of absorption-desorption.
由于基于三元甜菜碱（Be）的深层共熔溶剂（DESs）的再生能力低和吸水能力差，现有此类DESs的应用面临不可避免的局限性。在本研究中，通过向Be与乙二醇（EG）的二元体系中添加促进剂二乙醇胺（DEA），制备了三种不同摩尔比的基于三元Be的DESs。然后研究了DEA、温度和流速对基于Be的DESs吸收CO的影响。在摩尔比为1:5:8（Be:EG:DEA）时，在吸收温度为30°C、气体流速为50 mL/min的条件下，CO吸收容量达到0.207 g CO/g DES。添加不同含量的水会引发DES溶解，形成基于三元Be的DES + 水体系。添加的水抑制了基于三元Be的DESs对CO的吸收。对基于三元Be的DESs的再生能力评估表明，在五个吸收 - 解吸循环后，它们的CO吸收容量仍保持在0.176 g CO/g DES以上。
Zotero 插件