Effective energy efficient methods for heat duty reduction for amine-based post-combustion capture process based on the theoretical reactions energy calculation

Abstract

There have been many intensive studies in the field of carbon capture and storage (CCS), and a large number of studies have delved into developing energy efficient approaches for heat duty reductions of post-combustion CO2 capture processes under pilot plant scale. This research implemented practical applications of amine regeneration to conduct an energy efficient method based on theoretical reaction energy estimation. The reaction energy calculations was completed on a conventional monoethanolamine (MEA)-based amine scrubbing process, in order to verify that there was a huge deviation of the reaction energy (18.69 kJ/mol CO2/425 kJ/kg CO2) comparing to the overall energy cost (1,300 kJ/kg CO2) including the heat duty and work of CO2 compressing and transportation. Then, two common terms were explained in detail here: 'energy distribution' and 'energy efficiency'. Catalytic amine regeneration was as another practical, beneficial and energy efficient methodology. [Received: October 7, 2015; Accepted: Mach 11, 2016]