Application of PEI–K2CO3/AC for capturing CO2 from flue gas after combustion

Yafei Guo, Chuanwen Zhao, Changhai Li and Shouxiang Lu

Applied Energy, 2014, vol. 129, issue C, 17-24

Abstract: The capture of CO2 from flue gas after combustion using solid sorbents is one of the efficient options for reducing CO2 emissions from fossil fuel-fired power plants. To satisfy the requirement of large quantities flue gas treatment, the CO2 capture capacities of the solid sorbents must be focused on. In order to obtain a sorbent with high CO2 capture capacity, a novel PEI–K2CO3/AC sorbent was prepared by impregnating potassium carbonate (K2CO3) and polyethylenimine (PEI) on activated carbon (AC) in this work. The CO2 capture performance of this sorbent was investigated using a fixed bed reactor system. The CO2 capture capacity of PEI–K2CO3/AC with the total K2CO3 and PEI loadings of 50wt% was measured as 3.60mmol CO2/g under the condition of 60°C, 8% CO2+10% H2O. In addition, this sorbent is proved to be regenerable and stable during 5 cycle CO2 sorption–desorption tests. Compared with K2CO3/AC (loading of 58wt%) and PEI/AC (loading of 43wt%), PEI–K2CO3/AC presents higher CO2 capture capacity and long-term stability. Therefore, PEI–K2CO3/AC should be considered as a new option for capturing CO2 from flue gas after combustion.

Keywords: CO2 capture; PEI–K2CO3/AC; CO2 capture capacity; Long-term stability (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (9)

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DOI: 10.1016/j.apenergy.2014.05.003

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