LAUSR

Abstract Rate constants for the reaction of aqueous 2-amino-2-methyl-1-propanol (AMP)/ammonia (NH3) solutions with SO2 were determined by measuring their SO2 absorption rates. The SO2 absorption characteristics of 30 wt% AMP solutions with added NH3(1, 3, and 5 wt%) were investigated using a stirred-cell reactor, and the rates of SO2 absorption into the aqueous blended amine solutions were measured. The addition of 5 wt% NH3 to AMP significantly increases the SO2 absorption rate, as well as the rate constant for the reaction of AMP with SO2 by 197%. The relevant Arrhenius expressions were found to be k A M P , S O 2 = 50.787 × 1 0 7 exp ( − 3880.47 / T ) , and k A M P + N H 3 , S O 2 = 377.168 × 1 0 7 exp ( − 4283.71 / T ) .