Performance and cost analysis for CO2 capture from flue gas streams: Absorption and regeneration aspects

This paper provides sets of data and comparisons of absorption performance and energy requirement for regeneration of various chemical solvents including monoethanolamine (MEA), diethanolamine (DEA), and methyldiethanolamine (MDEA). The absorption performance was obtained by conducting a series of experiments in a laboratory-scale CO2 absorption unit. The absorption results were mainly presented in terms of gas-phase CO2 concentration profile along the absorber as well as height index (i.e. relative height required for a given CO2 capture target). The energy requirement for solvent regeneration was also obtained experimentally over ranges of operating conditions. The regeneration experiments were carried out using a laboratory-scale regeneration unit and the results were given in terms of reboiler heat-duty per unit CO2 captured/recovered. The obtained information with respect to absorption and regeneration were eventually used to establish the strategy for analyzing the associated capital and operating costs.