Comparative desorption energy consumption of post-combustion CO2 capture integrated with mechanical vapor recompression technology

Abstract

Post-combustion carbon capture (PCC) is a mature technology, which aims to capture CO2 from industrial emitters by using practical amine solvents. However, solvent regeneration process requires huge energy cost. Mechanical vapor recompression (MVR) is a promising technique, which can be applied to regenerate the heat from different fluid streams to the desorber by compressing the hot vapor. MVR can be properly utilized to different section of CO2 desorption process. A detailed review of novel configuration with MVR of desorption process was summarized in this research and the reduction of reboiler duty was evaluated. This study reported an optimized combinatory strategy of MVR process with split-flow approach to target at the optimization of temperature distribution along the system. Such enhanced desorption behavior contributed to the reduction on operating energy by improving the system from thermodynamics and kinetics. Besides, simulations were accomplished based on the current published operating conditions. Herein this research reported several new novel configurations associated with several MVR concepts. The enhanced desorption performance was compared with the conventional process and general MVR process. After comprehensive evaluation, the most attractive novel configuration reduced nearly 25% of reboiler duty and provided more desired cyclic capacity.