Abstract
Aqueous biphasic solvent blends consisting of diethylenetriamine (DETA) and a tertiary amine, N,N,N',N",N"-pentamethyldiethylenetriamine (PMDETA) or bis[2-(N,N-dimethylamino)ethyl] ether (BDMAEE), were experimentally assessed. Results revealed that the composition of solvent blends greatly affected the CO2 loading capacity and dual-phase transition behavior. A speciation analysis of dual liquid phases suggested that CO2 absorption was a two-stage process, in which CO2 reacted with DETA initially, followed by the protonation of PMDETA or BDMAEE and the production of HCO3-/CO32- species lately. Rates of CO2 absorption and pressures of CO2 desorption were also measured for the selected solvent blends and compared with the benchmark monoethanolamine solvent. Published by Elsevier Ltd.
Original language | English (US) |
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Pages (from-to) | 813-822 |
Number of pages | 10 |
Journal | Energy Procedia |
Volume | 114 |
DOIs | |
State | Published - 2017 |
Event | 13th International Conference on Greenhouse Gas Control Technologies, GHGT 2016 - Lausanne, Switzerland Duration: Nov 14 2016 → Nov 18 2016 |
Keywords
- CO capture
- absorption
- biphasic solvent
- desorption
- phase transition
ASJC Scopus subject areas
- Energy(all)