期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 167, 期 -, 页码 97-107出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2016.05.002
关键词
Carbon dioxide absorption; Tertiary amines; Equilibrium solubility; Cyclic capacity; CO2 absorption rate; CO2 regeneration rate; Heat of CO2 absorption; Heat input of CO2 regeneration
资金
- Overseas Research Experience Scholarship for Graduate Students, Graduate School at Chulalongkorn University
- Clean Energy Technologies Research Institute - CETRI at the University of Regina
- NPRP Grant from the Qatar National Research Fund (a member of Qatar Foundation) [7-1154-2-433]
This work focused on the synthesis of new tertiary amines by varying the alkyl chain length with/without hydroxyl group in the structure. The effect of chemical structure of newly synthesized tertiary amines; 4-(dimethylamino)-2-butanol (DMAB), 4-(dipropylamino)-2-butanol (DPAB), 4-(dibutylamino)-2-butanol (DRAB), 4-((2-hydroxyethyl)(methyl)amino)-2-butanol (HEMAB) and 4-((2-hydroxyethyl)(ethyl)amino)-2-butanol (HEEAB) were evaluated based on CO2 equilibrium solubility and cyclic capacity, as well as rates and heats of CO2 absorption and regeneration. The results showed that three amines (i.e. DMAB, HEMAB and HEEAB) had the highest CO2 absorption capacity (0.88, 0.44 and 0.68 mol CO2/mol amine at 313 K temperature and 15 kPa CO2 partial pressure), and cyclic capacity (0.52, 0.26 and 0.40 at 313-353 K temperature range, 15 kPa CO2 partial pressure). These amines also had fast CO2 absorption rate (0.082, 0.111 and 0.142 mol CO2/min) and CO2 regeneration rate (0.512, 0.452 and 0.295 mol CO2/min) while maintaining low heat of CO2 absorption (-34.17, 56.21 and 69.79 kJ/mol CO2) and heat input of CO2 regeneration (39.73, 60.48 and 72.44 kJ/mol CO2). Based on these results, DMAB, HEMAB, and HEEAB can be considered to be promising amine components for blending for a post combustion CO2 capture process. (C) 2016 Elsevier B.V. All rights reserved.
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