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Investigation of CO2 solubility in monoethanolamine hydrochloride based deep eutectic solvents and physical properties measurements

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Chinese Journal of Chemical Engineering 2020年第11期28卷 2848-2856页

作者： Khatereh Ali Pishro Ghulam Murshid Farouq Sabri Mjalli jamil naser Department of Petroleum&Chemical Engineering Sultan Qaboos UniversityMuscatOman

Deep eutectic solvents(DESs)have drawn a growing research interest for applications in a wide range of scientific and industrial ***,a limited effort has been reported in the area of gas separation processes and particularly the carbon dioxide *** study introduces a novel set of DESs that were prepared by complexing ethylenediamine(EDA),monoethanolamine(MEA),tetraethylenepentamine(TEPA),triethylenetetramine(TETA)and diethylenetriamine(DETA)as hydrogen bond donors to monoethanolamide hydrochloride(EAHC)salt as a hydrogen bond *** absorption capacity of CO2 was evaluated by exploiting a method based on measuring the pressure drop during the absorption *** solubility of different DESs was studied at a temperature of 313.15 K and initial pressure of 0.8 *** DES systems 1 EAHC:9 DETA,1 EAHC:9 TETA and 1 EAHC:9 TEPA achieved the highest CO2 solubility of 0.6611,0.6572 and 0.7017 mol CO2·(mole DES)-1 *** results showed that CO2 solubility in the DESs increased with increasing the molar ratio of hydrogen bond *** addition,the CO2 solubility increased as the number of amine groups in the solvent increases,therefore,increasing the alkyl chain length in the DESs,resulted in increasing the CO2 *** analysis confirms the DES synthesis since no new functional group was *** FTIR spectra also revealed the carbamate formation in DES-CO2 *** addition,the densities and viscosities of the synthesized DESs were also *** CO2 initial investigation of reported DESs shows that these can be potential alternative for conventional solvents in CO2 capture processes.

关键词： Greenhouse gases Deep eutectic solvents CO2 solubility Density Viscosity

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