Dynamic behaviour of a K-doped Ga substituted and microwave aged hydrotalcite-derived mixed oxide during CO2 sorption experiments

다국어 초록 (Multilingual Abstract)

A potassium impregnated magnesium–aluminum–gallium hydrotalcite, aged under microwaveirradiation (K-HTCGa MW), was tested for CO2 capture during a long term breakthrough experimentalcampaign. Higher total pressures, CO2 concentrations in the feed and temperatures resulted in higheroutstanding sorption capacities. The presence of H2O was considerably advantageous for increasing theCO2 capture. Finally, it was observed that higher total pressures, temperatures and H2O contents allowedhigher bed usage efficiencies. EDS elemental distribution mapping showed that potassium and galliumwere mobilized towards the sorbent surface under wet conditions, which could have contributed to theenhanced behavior of the sorbent under such conditions.

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