Rapid,selectivity,and reversibility absorption of SO_(2) via purine-based deep eutectic solvents and thermodynamic analysisOA
Since the advantages of simple preparation,low-priced,environmental friendliness,and high absorption capacity,deep eutectic solvents(DESs)are considered to have eminent application potential in terms of SO_(2) absorption.However,the absorption rate,selectivity,and reversibility of DESs urgently need to be further improved to meet the requirements of industrialization.In this work,five purine-based DESs were designed and synthesized through the use of 1-ethyl-3-methylimidazolium chloride(EmimCl)as hydrogen bond acceptors(HBAs)plus 6-aminopurine(6-AmP),6-hydroxypurine(6-HoP),and 6-chloropurine(6-ChP)as hydrogen bond donors(HBDs),respectively.The results indicated that the optimal molar ratio of HBAs to HBDs is 7:1,and the absorption capacity of EmimCl + 6-AmP-7 can reach up to 18.118 mol/kg,at 298.15 K and 1.0 bar.Notably,the present purine-based DESs not only achieve gas-liquid equilibrium within 40 s,but also exhibit outstanding reversibility(absorb-desorb more than 30 times)and remarkable selectivity of SO_(2)/CO_(2).Furthermore,a reaction equilibrium thermodynamic model(RETM)equation was employed to investigate the absorption behavior by combining the absorption data under different SO_(2) partial pressures and temperatures.Finally,Fourier-transform infrared(FT-IR)spectroscopy and 1H nuclear magnetic resonance(NMR)were conducted to explore further the formation and SO_(2) absorption mechanism of purine-based DESs.It is revealed that the former is mainly hydrogen bonding interaction among HBAs and HBDs,and the latter is mainly Lewis acid-base interaction plus strong charge-transfer interaction among DESs and SO_(2).Based on the obtained data,it could be confirmed that the SO_(2) absorption includes both physical and chemical absorption.
Yiru Zou;Chao Wang;Haiyan Ji;Peiwen Wu;Yanhong Chao;Xiaoxiao Yu;Zhendong Yu;Haiyan Liu;Zhichang Liu;Wenshuai Zhu
College of Chemical Engineering and Environment,State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum-Beijing,Beijing,102249,China School of Chemistry and Chemical Engineering,School of the Environment and Safety Engineering,School of Materials Science and Engineering,Jiangsu University,Zhenjiang,212013,ChinaSchool of Chemistry and Chemical Engineering,School of the Environment and Safety Engineering,School of Materials Science and Engineering,Jiangsu University,Zhenjiang,212013,China Macao Institute of Materials Science and Engineering(MIMSE),MUST-SUDA Joint Research Center for Advanced Functional Materials,Zhuhai MUST Science and Technology Research Institute,Macao University of Science and Technology,Taipa,Macao,999078,ChinaSchool of Chemistry and Chemical Engineering,School of the Environment and Safety Engineering,School of Materials Science and Engineering,Jiangsu University,Zhenjiang,212013,ChinaSchool of Chemistry and Chemical Engineering,School of the Environment and Safety Engineering,School of Materials Science and Engineering,Jiangsu University,Zhenjiang,212013,ChinaCollege of Chemical Engineering and Environment,State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum-Beijing,Beijing,102249,ChinaCollege of Chemical Engineering and Environment,State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum-Beijing,Beijing,102249,ChinaCollege of Chemical Engineering and Environment,State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum-Beijing,Beijing,102249,China School of Chemistry and Chemical Engineering,School of the Environment and Safety Engineering,School of Materials Science and Engineering,Jiangsu University,Zhenjiang,212013,ChinaCollege of Chemical Engineering and Environment,State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum-Beijing,Beijing,102249,ChinaCollege of Chemical Engineering and Environment,State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum-Beijing,Beijing,102249,ChinaCollege of Chemical Engineering and Environment,State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum-Beijing,Beijing,102249,China School of Chemistry and Chemical Engineering,School of the Environment and Safety Engineering,School of Materials Science and Engineering,Jiangsu University,Zhenjiang,212013,China
化学化工
Deep eutectic solventsSO_(2)absorptionPurine derivativesSelectivity and reversibility
《Green Chemical Engineering》 2026 (2)
P.180-190,11
the financial support from the National Natural Science Foundation of China(Nos.22425808,22178154,and 22108105)Science Foundation of China University of Petroleum,Beijing(Nos.2462024XKBH001,ZX20220042,and ZX20220044).
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