Thermodynamic and kinetic study of CO2 adsorption on a fine activated carbon in a sound assisted fluidized bed

This work is focused on the investigation of the mechanism (isotherm), nature/strength (thermodynamics) and rate (kinetics) of CO2 adsorption on a commercial activated carbon in a sound assisted fluidized bed. Langmuir and Freundlich equations were used to model the CO2 adsorption isotherm in the low pressure region (i.e. typical of a combustion flue gas). Then, adsorption behaviour was elucidated by energy function such as standard Gibbs free energy, enthalpy and entropy. The isosteric heat of adsorption was also evaluated. Finally, this study also presented a kinetic analysis of CO2 adsorption, from which CO2 binding on activated carbon was deduced to follow pseudo-first order kinetic.