Abstract
The effect of water-soluble polymers with different structure on the sorption properties of nonregenerable lime sorbents of carbon dioxide was studied. It was found that the introduction of water-soluble polymers into the sorbents could either decrease or increase the protective power time of the sorbents. To explain the revealed regularities, pore structure of the sorbents was investigated, molecular-dynamic modeling of the carbon dioxide transport was performed, and CO2 diffusion coefficients in water-polymer solutions were calculated. The results of the modeling correlate with the sorption experiment data: a high dynamic sorption capacity of the sorbent is reached after adding a water-polymer medium with a high CO2 diffusion coefficient. The results obtained can be used both to optimize the systems for the recovery of carbon dioxide from gas mixtures and to intensify mass transfer in the systems intended for photo- and electrocatalytic conversion of CO2 to useful products.
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