Abstract
AbstractHeat‐stable salts (HSS) can be generated by degradation of amines during absorptive CO2 capture. The removal of HSS from lean amine using electrodialysis was carried out with the aims of enhancing HSS removal efficiency and reducing energy consumption as high as possible using homogeneous and heterogeneous ion exchange membranes. The results demonstrate the significant effects of concentrated solution on removal efficiency, energy consumption, amine loss, and amount of effluent. In the case of using a lean amine of the gas refinery and water as a concentrated solution, the HSS removal can be enhanced by 30 % and the amount of effluent can be reduced by 40 % using a homogeneous membrane instead of a heterogeneous membrane. Furthermore, the energy consumption decreased by 51 %.
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