Page 104 - Gas Purification 5E

94 Gas Purijication

Figure 2-58. Vapor pressure of aqueous DGA solutions as a function of temperature
and concentration. (Jethon Chemical Co., 1969)

COz in DGA solutions for T = 60 to 300"F, Pm, = 22.6 to 162.6 psia, and w = 10 to 60
-
wt% DGA (Christensen et al., 1985):
H (Btdlb C02) =-1.8 w -790
(range of H -810 to -830 Btu/lb Cod (2-15)

C02 in MDEA solutions for T = 60 to 300"F, Pcoz = 22.6 to 212.6 psia, and w = 20 to 60
wt% MDEA (Merkley et al., 1986):

H (Btu/lb C02) = -0.9438 w - 0.6764 T - 400.76
(range of H: -460 to -660 Btu/lb C02) (2-16)