Abstract
In order to combat global warming CO_2 emission reduction from the iron and steel making industry is necessary. The Active Carbon Recycling Energy System for the iron making process (iACRES) has been developed as a technical option for substantial CO_2 reduction. Lithium ortho-silicate (Li_4SiO_4, LS), which can separate high purity CO_2 at high temperatures, is a suitable solid sorbent to capture CO_2 from the iACRES process. In our previous studies, a spherical LS pellet was analyzed via numerical analysis using the unreacted core model. The diffusion resistance resulting from decreased porosity as CO_2 absorption occurred was found to be the dominant factor inhibiting the CO_2 absorption rate. In this study, the effect of a cylindrical LS pellet was analyzed using commercial FEM software with diffusion resistance and chemical reaction incorporated into the model. The result of the numerical analysis showed a trade-off between CO_2 loading capacity and absorption rate.
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