Table 5. Viscosities μ of Aqueous Solutions Containing MEA (2), HEIA (3), and CO₂ (4)^a.

						μ/(mPa s)
x2	x3	x4	α0	α1	α2	298.15 K	303.15 K	313.15 K	323.15 K	333.15 K	343.15 K	353.15 K
0.1128	0	0	0	0	0	2.418	2.089	1.614	1.281	1.043	0.866	–
0.1102	0	0.0235	0.213	0	0	2.988	2.615	2.012	1.618	1.334	1.092	–
0.1091	0	0.0271	0.248	0	0	3.053	–	2.079	–	–	1.138	–
0.1076	0	0.0459	0.426	0	0	3.618	3.139	2.430	1.945	1.583	1.317	–
0.1062	0	0.0527	0.496	0	0	3.674	–	2.531	–	1.652	–	–
0	0.2722	0	0	0	0	21.946	17.339	11.266	7.862	5.687	4.282	3.337
0	0.1173	0	0	0	0	4.443	3.767	2.836	2.182	1.766	1.438	1.182
0	0.0419	0	0	0	0	1.667	1.483	1.175	0.960	0.798	–	–
0.1111	0.0130	0	0	0	0	2.770	2.390	1.814	1.432	1.155	0.950	–
0.1078	0.0127	0.0297	0.275	0.248	0.225	3.765	–	2.382	–	–	1.288	–
0.1047	0.0123	0.0576	0.55	0.495	0.450	4.694	–	2.955	–	–	–	–
0.1101	0.0278	0	0	0	0	3.334	2.825	2.137	1.665	1.338	1.099	–
0.1064	0.0266	0.0245	0.233	0.19	0.16	4.249	3.635	2.758	2.135	1.730	1.424	–
0.1067	0.0270	0.0304	0.285	0.228	0.19	4.389	–	2.748	–	–	1.379	–
0.1038	0.0259	0.0488	0.467	0.37	0.31	5.309	4.576	3.447	2.709	–	–	–
0.1036	0.0262	0.0596	0.57	0.456	0.380	5.336	–	3.546	–	–	–	–

^ax_i is the mole fraction of component i in aqueous solution, T is temperature, and α_i (i = 0, 1, 2) are measures of the CO₂ loading as determined from the definitions in Table 3. Expanded uncertainties at 95% confidence are U(T) = 0.02 K, U(α₀) = 0.03, U(x₂) = 0.0002, and U(μ) = 0.05 mPa s. Expanded uncertainties at 95% confidence are U(T) = 0.02 K, U(x₃) = 0.0002, and U(μ) = 0.05 mPa s. Expanded uncertainties at 95% confidence are U(T) = 0.02 K, U(α₀) = U(α₁) = 0.01, U(α₂) = 0.0098, U(x₂) = U(x₃) = 0.0002, and U(μ) = 0.01 mPa s. All measurements were performed at a pressure of 0.1 MPa.