Figure 8.

(a) Surface tensions σ as a function of temperature T for 30 mass % aqueous MEA solution and solutions formed by dissolving CO₂ in 30 mass % aqueous MEA with different loadings α₀. This work: orange □, α₀ = 0; green ○, α₀ = 0.248; blue Δ, α₀ = 0.496; and — correspond to the predictions using eqs 14–16 with parameters from refs (46) and (47) (Table 14). (b) Surface tension as a function of CO₂ loading at a constant temperature of 313.15 K. Comparison between our data: blue Δ, and literature data: orange ◇,⁵² pink ●,⁴⁷ and green □.³¹