Abstract
This study investigated the contribution of absorption heat, sensible heat and heat of vaporization towards the regeneration energy (Qreg, kJ/g-CO2) of AMP–MDEA–DETA tri–solvent blends. The experiment was conducted at atmospheric pressure and 363K. Their CO2 absorption prior to their regeneration was conducted at 313K, 101.3kPa and 15.1 v/v% CO2. The regeneration energy was estimated using two different methods (experimental and correlation) and the results showed similar trend. Results showed that the AMP–MDEA–DETA blends have lower regeneration energy than MEA and this was due to a much lower sensible heat of the blends. It was also discovered that higher absorption heats does not necessarily indicate higher regeneration energy, rather the effects of both sensible heat and/or heat of vaporization can greatly affect the regeneration energy.
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