Table 2. CO₂ Solubility Data in aq (MDEA + 2-MPZ) Solution^a.

aq (MDEA+ 2-MPZ)	T = 303.2 K		T = 313.2 K		T = 323.2 K
molal (m)	PCO2/kPa	αCO2	PCO2/kPa	αCO2	PCO2/kPa	αCO2
3.509 + 0.509	4.3	0.189 ± 0.002	5.7	0	6.6	0.139 ± 0.001
	9.8	0.331 ± 0.002	15.2	0.335 ± 0.003	18.1	0.270 ± 0.002
	21.2	0.462 ± 0.003	40.3	0.459 ± 0.004	33.8	0.376 ± 0.003
	41.2	0.569 ± 0.004	72.7	0.546 ± 0.005	56.1	0.454 ± 0.004
	65.1	0.644 ± 0.005	90.5	0.605 ± 0.005	73.6	0.513 ± 0.005
	98.5	0.683 ± 0.006	114.3	0.642 ± 0.006	99.4	0.548 ± 0.005
	119.1	0.708 ± 0.007	133.7	0.671 ± 0.007	114.2	0.578 ± 0.006
	143.1	0.722 ± 0.007	157.8	0.761 ± 0.008
	197.3	0.749 ± 0.009	199.3	0.775 ± 0.009
	203.2	0.753 ± 0.009
3.017 + 1.008	2.3	0.183 ± 0.001	5.0	0.155 ± 0.001	5.0	0.141 ± 0.001
	10.1	0.345 ± 0.002	11.5	0.303 ± 0.002	15.1	0.300 ± 0.002
	20.0	0.506 ± 0.004	27.0	0.435 ± 0.003	34.5	0.422 ± 0.003
	44.5	0.627 ± 0.005	57.9	0.534 ± 0.004	72.0	0.494 ± 0.004
	86.5	0.706 ± 0.006	77.6	0.596 ± 0.005	82.9	0.554 ± 0.005
	118.8	0.737 ± 0.007	99.2	0.638 ± 0.006	104.0	0.596 ± 0.006
	146.2	0.759 ± 0.007	116.9	0.670 ± 0.006	129.6	0.624 ± 0.006
	183.5	0.774 ± 0.008	157.4	0.760 ± 0.008	192.9	0.672 ± 0.008
	235.7	0.786 ± 0.010	200.0	0.767 ± 0.009
	279.9	0.873 ± 0.011
	335.4	1.013 ± 0.013
2.502 + 1.509	3.0	0.171 ± 0.001	3.7	0.134 ± 0.001	5.5	0.119 ± 0.001
	6.8	0.319 ± 0.002	7.9	0.284 ± 0.002	13.2	0.249 ± 0.002
	24.3	0.443 ± 0.003	18.5	0.422 ± 0.003	26.5	0.377 ± 0.003
	35.9	0.553 ± 0.004	44.2	0.524 ± 0.004	50.5	0.485 ± 0.004
	77.6	0.617 ± 0.005	69.4	0.598 ± 0.005	75.4	0.550 ± 0.005
	108.9	0.651 ± 0.006	97.1	0.646 ± 0.006	104.4	0.585 ± 0.006
	127.6	0.669 ± 0.007	118.1	0.671 ± 0.006	126.9	0.609 ± 0.006
	160.3	0.679 ± 0.007	136.4	0.723 ± 0.007	157.0	0.634 ± 0.007
	241.1	0.706 ± 0.010	149.0	0.829 ± 0.008
	251.2	0.797 ± 0.010	180.8	0.856 ± 0.009

^aThe standard uncertainties (u) associated with the measured quantity are u (T) = 0.1 K and u (P_CO2) = 0.5 kPa. α_CO2 is the CO₂ loading of the solvent in mol of CO₂ per mol of solvent.