论文信息 - Solvent reclaiming by crystallization of potassium sulfate

Solvent reclaiming by crystallization of potassium sulfate

Abstract Residual SO2 accumulates as sulfate in aqueous amine used for CO2 capture from coal-fired power plants. This paper reports research results on a new process to remove this sulfate by crystallization of K2SO4. The K2SO4 solubility in CO2 loaded aqueous amine solutions was measured and correlated with an empirical relationship and with the electrolyte-NRTL model in AspenPlus®. The volume median particle size of K2SO4 by continuous crystallization ranges from 90 to 340 m. A case study of the new reclaiming process was done in AspenPlus®and the total estimated cost to remove sulfate is about $ 1.1/ton CO2.

Gary T. Rochelle | Qing Xu | G. Rochelle | Qing Xu

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