The accumulation of heat stable salts(HSS)in amine liquid during CO2 capture cycle can increase amine liquid consumption and cause serious corrosion.Thus

a combined process was developed

including removal of HSS anion by anion exchange resin

chromaticity color by activated carbon

and further purification by macro-porous resin.Some influencing factors were investigated and the absorption performance of purified amine was tested.The results show that

the amine exchange resin can perform well even under conditions with high temperature

high pH value and high salt content

of which the removal rate of HSS was over 90%.After treated by the combined process above

the CO2 absorption ability of the purified amine liquid can recover to 92% of that of the flesh amine liquid

with a color of transparent pale yellow

which meets the requirements of industrial recycling.