One-dimensional modeling of a turbulent fluidized bed for a sorbent-based CO2 capture process with solid–solid sensible heat exchange

Abstract A one-dimensional model for a turbulent fluidized bed is proposed and applied to the analysis of a CO 2 capture process using a polyethylenimine (PEI)-silica sorbent. A formula for the contact efficiency was derived from the kinetic equation of the sorbent and the Kunii–Levenspiel core–shell model. Axial profiles of the gas and solid phase CO 2 concentrations and bed temperature were computed, and the energy demand for CO 2 capture was assessed for different degrees of sensible heat recovery.