Mineral carbonation, multi-scale modelling, CO2 capture, CO2 sequestration
Abstract :
[en] The objective of this work is to develop a COMSOL Multiphysics numerical model to
represent the physico-chemical phenomena associated to CO2 sequestration by mineral
waste carbonation process. In the model, the bed of particles is described as a dual-scale
porosity medium. The two scales considered are the intragranular and intergranular
scales. The model is formulated to predict phenomena occurring in the dual-scale system,
considering the diffusion of CO2 between particles and within them. This involves the
characterization of crucial parameters such as the porosity and the amount of water
present both inside and outside the solid particles. The proposed model is qualitatively
validated against existing literature and quantitatively validated against experimental
results. This article presents the results obtained for the Ca(OH)2 carbonation during three
days, emphasizing the significance of the COMSOL software in comprehending the
process thoroughly.
