Page 99 - Gas Purification 5E

Alkanolamines for Hydrogen Surfide and Carbon Dioxide Removal 89

Mob Ratlo, mole acid garhnob AMP
Figure 2sA Solubility of GO2 and H2S in 2.0 M aqueous AMP. (Roberts and Maiher, 7989

dissociation of bicarbonate ion:
HC03- = H+ -k C032- (2-10)

dissociation of hydrogen sulfide:

H2S = H+ + HS- (2-1 1)

dissociation of bisulfide ion:

HS- = H+ + S2- (2-12)

solution of carbon dioxide:

pco2 = Go2 (C02) (2-13)
solution of hydrogen sulfide:

PH2S = HH2S (H2s) (2-14)