Double H-bonds multimer absorbent design for H2S absorption

被引：3
作者：
Liang, Peng-Ju [1 ,2 ]
Wu, Qi-Xiang [1 ,2 ]
Chang, Chun-Ran [3 ]
Chu, Guang-Wen [1 ,2 ]
Zou, Hai-Kui [1 ,2 ]
Sun, Bao-Chang [1 ,2 ,4 ]
Chen, Jian-Feng [1 ,2 ,4 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
[2] Beijing Univ Chem Technol, Minist Educ High Grav Engn & Technol, Res Ctr, Beijing 100029, Peoples R China
[3] Xi An Jiao Tong Univ, Inst Ind Catalysis, Sch Chem Engn & Technol, Xian 710049, Peoples R China
[4] 15 Bei San Huan Dong Rd, Beijing 100029, Peoples R China
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2024年 / 342卷
关键词：
DBU/EG; Double H-bonds; H2S; Multimer absorbent; Physical absorption; PROTIC IONIC LIQUIDS; HYDROGEN-SULFIDE; SELECTIVE ABSORPTION; HIGHLY EFFICIENT; N-METHYLDIETHANOLAMINE; CO2; SOLUBILITY; SUPERBASE; SULFOLANE; SOLVENTS;
D O I：
10.1016/j.seppur.2024.126925
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A double H-bonds multimer absorbent for hydrogen sulfide (H2S) absorption was designed via intermolecular self-assembly using 1,8-Diazabicyclo-[5.4.0]-undec-7-ene (DBU) and ethylene glycol (EG) under the guidance of quantum chemical calculation (QCC). The formation mechanisms of multimer absorbents and the absorption mechanisms between those absorbents and H2S were explored by QCC and experiments. It was found that the formed multimer absorbent at the DBU/EG molar ratio of 1:2 has two intermolecular H-bonds with different strengths between DBU and EG, which can combine with H2S via strong intermolecular forces. Furthermore, the characteristics analysis of multimer absorbents and complexes confirmed the above mechanisms. Experimental results indicated that the DBU-2EG has a higher H2S solubility of 5.8 mol/kg multimer absorbent with a low viscosity value of 15.12 mPa & sdot;s at 25 degrees C and better regeneration performance. The multimer absorbent exhibits great potential in the H2S capture process.
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页数：10
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