期刊
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
卷 5, 期 1, 页码 61-68出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijggc.2010.06.009
关键词
CO2; Solubility; Amine; Screening; Solvent; Molecular structure; Absorption; Flue gas
类别
资金
- Dutch Ministry of Economic Affairs (EZ)
The cyclic capacity of various potential aqueous amine-based solvents was determined by performing CO2 absorption experiments at 30 degrees C and 10 kPa CO2 partial pressure and regeneration at 90 degrees C and atmospheric pressure. By comparing selected solvents the effect of molecule structure on the cyclic capacity and reactivity at low CO2 partial pressure was investigated in this work. 1,7-Diaminoheptane and 1,6-hexanediamine, N,N'-dimethyl showed a high cyclic loading of 0.81 and 0.85 moles CO2/moles amine respectively. Aqueous solutions of 1,6-hexanediamine, N,N'-dimethyl of 0.5 and 2.55 mole/L concentration were selected to study solubility of CO2 at different CO2 partial pressures ranging from 1 up to 40 kPa, 30 degrees C and at 1 atm. The solubilities of CO2 in aqueous 1,6-hexanediamine, N,N'-dimethyl at 30 degrees C were compared with CO2 solubility in aqueous solution of MEA of similar solvent molar concentrations. The solubility of CO2 in 2.55 mole/L 1,6-hexanediamine, N,N'-dimethyl was found to be almost twice that of 2.5 mole/L MEA at lower CO2 partial pressure. (C) 2010 Elsevier Ltd. All rights reserved.
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