In this talk, we will report our recent work on the MgO based double salt absorbents which can be used for CO2 removal from warm gas stream(300-500�C).  We studied the effects of several synthesis parameters, like Metal/Mg ratio, solution salt concentration, method of mixing, and synthesis temperature. The properties of the intermediate products and the final absorbents were characterized by SEM, XRD, and BET. The performance of the absorbent was evaluated in both a TGA-DSC unit and a small fixed bed reactor. These absorbents were regenerated through CO2 pressure swing or through temperature swing. We found that by carefully controlling the synthesis parameters, MgO based absorbents with a high CO2 capacity of ~ 4 mmol/g of absorbent could be repeatedly produced. These absorbents can be easily regenerated through CO2 pressure swing or through temperature swing. The mechanism of the CO2 absorption on these MgO based absorbents will also be discussed.

MgO based doulble salt absorbents for CO2 removal from warm gas streams

243rd National Meeting (2012)

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