石油与天然气化工2023，Vol.52Issue(6)：15-22,8.DOI:10.3969/j.issn.1007-3426.2023.06.003
胍类氨基酸离子液体捕集烟气中CO2实验研究
Experimental study on the capture of CO2 in flue gas by guanidine amino acid ionic liquids
摘要
Abstract
Objective In order to find a new absorbent with good absorption performance,low solvent loss,and low energy consumption for CO2 capture,the preparation and performance of guanidine amino acid ionic liquids to capture CO2 in flue gas was investigated.Methods Three kinds of guanidine amino acid ionic liquids with low viscosity,namely[TMG][Lys],[TMG][Ala],and[TMG][Asp],were prepared using tetramethylguanidine(TMG)as a cation and lysine(Lys),alanine(Ala),and aspartic acid(Asp)as anions.The effects of anionic types on CO2 absorption were investigated.Results The alkaline[TMG][Lys]had a higher CO2 absorption,with a CO2 absorption capacity of 0.64 mol CO2/mol IL under the condition of atmospheric pressure,45℃,and 80 mL/min.The addition of water had a positive effect on the absorption of CO2.The absorption capacity of 30 wt%[TMG][Lys]aqueous solution increased to 0.99 mol CO2/mol IL and could still keep 0.81 mol CO2/mol IL after 5 absorption-desorption cycles.The decarbonization mechanism of[TMG][Lys]was analyzed by Fourier transform infrared spectroscopy(FT-IR)and nuclear magnetic resonance hydrogen spectroscopy(1 H-NMR).CO2 mainly reacts with the amino group on the anion to form carbamate to achieve efficient capture of CO2 in the flue gas.Conclusions It can provide reference for the development of new absorbents in industrial CO2 capture.关键词
二氧化碳捕集/离子液体/氨基酸/烟气/吸收机理Key words
CO2 capture/ionic liquids/guanidine/amino acid/flue gas/absorption mechanism引用本文复制引用
王琪,李爱蓉,康洛铭,王军,廖铁,肖杨,王治红..胍类氨基酸离子液体捕集烟气中CO2实验研究[J].石油与天然气化工,2023,52(6):15-22,8.基金项目
四川省自然科学基金项目"低能耗水合物法分离捕集烟气中CO2 过程强化关键技术研究"(2022 NSFSC0198) （2022 NSFSC0198）
