A performance comparison study of five single and sixteen blended amine absorbents for CO2 capture using ceramic hollow fiber membrane contactors

The present study has endeavored to establish the relations between the CO2 absorption properties of five single amine-based absorbents including monoethanolamine (MEA), diethylamine (DEA), N-methyl-diethanolamine (MDEA), 2-amino-2-methyl-1-propanol (AMP), and piperazine (PZ), and their sixteen binary mixtures in the blended amine-based absorbents for CO2 chemical absorption using a hydrophobic modified ceramic hollow fiber membrane contactor (HFMC). Keeping all other variables constant, the CO2 absorption properties of single and blended amine-based absorbents for CO2 chemical absorption using hydrophobic modified ceramic HFMCs are highly dependent on their chemical nature and concentration. MEA and DEA have the highest CO2 absorption flux among the single amine solutions. For the CO2 absorption in the blended amine-based absorbents, the replacement of MDEA with 20 wt% DEA increased the CO2 chemical absorption from 1 x 10(4) mol/m(2) s to about 7 x 10(4) mol/m(2) s. Aqueous MDEA blended DEA reaches a percentage of increase of CO2 absorption flux over 500% in comparison with the corresponding aqueous solution of single MDEA. (C) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

Automated summary

This study aimed to establish the relationship between the CO2 absorption properties of five single amine-based absorbents and their sixteen binary mixtures for CO2 chemical absorption, using a hydrophobic modified ceramic hollow fiber membrane contactor. The study found that MEA and DEA have the highest CO2 absorption flux among single amine solutions, while replacing MDEA with 20 wt% DEA can significantly increase CO2 chemical absorption in blended amine-based absorbents. Additionally, aqueous MDEA blended with DEA showed a over 500% increase in CO2 absorption flux compared to single MDEA solution.