Influence of gas flow rate for K2CO3 based CO2 capture

Superficial gas velocity or GHSV could be one important operating parameter in continuous CO2 removal in circulating fluidized bed, considering the optimum residence time required for gas-solid reaction (Boonprasop et al., 2019Sengupta et al., 2018). The increase in inlet gas velocity from 0.06 m/s to 0.11 m/s had resulted in the decline in CO2 removal of K2CO3/Al2O3 from 76.6% to 66.7%, when the adsorbent was tested in a circulating fluidized bed. This was attributed to the decrease in gas-solid contact time (Sengupta et al., 2018). As a consequence, gas velocity should be carefully optimized to an appropriate value, so as to provide an effective bubbling fluidization regime for sufficient gas-solid contact in the reactor.”

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