(572d) CFD Simulation of Carbon Capture Using an Amine Based Solid Sorbent

Carbon capture using of amine-based solid sorbents from existing flue gas of fossil fuel-fired power plants, has been considered as a promising method compared to the conventional liquid based systems. National Energy Technology Laboratory (NETL) designed an integrated adsorption and regeneration system of fluidized beds to investigate the amine-based sorbents capacity. In this study, the Eulerian-Eulerian two fluid model is used to conduct two dimensional Computational Fluid Dynamic (CFD) simulation of Carbon dioxide sorption and regeneration using amine-based solid sorbents in a circulating fluidized bed, based on NETL setup. kinetic theory was used as constitutive relation to analyze particulate phase flow model along with frictional stress and viscosity for the dense solid flow regimes. Stable operation of the system and continues circulation of the solids between carbonator and regenerator fluidized beds has been verified by comparing simulation results of solid circulation rate by experimental data.

Also, at the second stage of the study, carbonation and regeneration heterogeneous reactions was added to the CFD model. So, in addition to continuity and momentum conservation equations, species conservation and energy conservation equations were also solved to calculate the rate and extend of CO₂ sorption and temperature distribution in the system