Patent ID: 8105420

Claim:
A method for inhibiting O 2 - and/or SO 2 -induced amine degradation during CO 2 capture from a gas stream comprising adding to an amine absorbent, an effective amount of an inhibitor of O 2 - and/or SO 2 -induced amine degradation selected from sodium sulfite (Na 2 SO 3 ), potassium sodium tartrate tetrahydrate (KNaC 4 H 4 O 6 .4H 2 O), ethylenediaminetetraacetic acid (EDTA) and hydroxylamine (NH 2 OH), and analogs and mixtures thereof, wherein a mixture of Na 2 SO 3 and KNaC 4 H 4 O 6 .4H 2 O is added in an amount of about 0.055 kmol/m 3 to about 0.6 kmol/m 3 , and in the molar ratio of Na 2 SO 3 /KNaC 4 H 4 O 6 .4H 2 O of about 0.15 to 60.