Abstract
Chemical reactions associated with the absorption of CO2 into aqueous solutions of blends of piperazine (PZ) with N-methyldiethanolamine (MDEA), etc. were studied by 13C-NMR spectroscopy. The coexistence of PZ and MDEA enhanced the initial apparent rate of HCO-3 /CO2-3 formation. This result can be explained by considering that PZ monocarbamate rapidly formed works as an organocatalyst in the formation reaction of HCO-3 . Concentration changes of chemical species in CO2-absorbed aqueous amine solutions upon heating (80 °C, 30 min) were studied by 13C-NMR spectroscopy. Carbon dioxide regeneration originates mainly from HCO-3 /CO2-3, and not from carbamate and carbonate.
Original language | English |
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Pages (from-to) | 869-876 |
Number of pages | 8 |
Journal | Energy Procedia |
Volume | 37 |
DOIs | |
Publication status | Published - 2013 Jan 1 |
Event | 11th International Conference on Greenhouse Gas Control Technologies, GHGT 2012 - Kyoto, Japan Duration: 2012 Nov 18 → 2012 Nov 22 |
Keywords
- Amine
- Carbamate
- Carbon dioxide
- Piperazine
ASJC Scopus subject areas
- Energy(all)