CO2 capture from flue gas using EAE-1DMA2P solvent in a packed column

Abstract

The mass transfer plays a decisive role in screening and evaluation of amine solvents as well as in designing and scale-up of CO2 capture. The influence of different operating parameters on mass transfer processes in CO2 capture by EAE-1DMA2P amine solution was thoroughly investigated using a small-scale packed column. The mass transfer mechanism of EAE-1DMA2P amine solution in the capture of CO2 was discussed by determining both mass transfer control steps and the reaction region between CO2 and amine solvent, which provided a theoretical guidance for subsequent development of new solvents for large-scale applications. In addition, based on the experimental observations of KGav, a prediction model for KGav of EAE-1DMA2P composite amine solution was established by comparing two empirical models viz., Kohl-Riesenfeld-Astarita and Sheng of which Kohl-Riesenfeld-Astarita model provided a better fitting of the experimental results. The commonly used amine solvents and EAE-1DMA2P composite solvents were further compared and analyzed in terms of packed column size design and solvent consumption. The required packed column volume using EAE-1DMA2P composite solvent was only 4.95 m3, while the EAE-1DMA2P composite solvent has the smallest solvent consumption among all the solvents, indicating that this solvent has a lower operating cost than the other solvents, suggesting better industrial application.