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Characterization of 2-piperidineethanol and 1-(2-hydroxyethyl)pyrrolidine as strong bicarbonate forming solvents for CO 2 capture

2017; Elsevier BV; Volume: 63; Linguagem: Inglês

10.1016/j.ijggc.2017.05.021

1750-5836

Ardi Hartono, Rune Rennemo, Muhammad Awais, Solrun Johanne Vevelstad, Odd Gunnar Brakstad, Inna Kim, Hanna K. Knuutila,

Ionic liquids properties and applications

The solubility of CO2 in the aqueous solutions of 50 mass% 2-Piperidineethanol (2-PPE) and 40 mass% 1-(2-Hydroxyethyl)pyrrolidine (1-(2HE)PRLD) was measured at temperatures from 40 to 120 °C at CO2 loading from 0.04 to 0.8 mol-CO2/mol-amine. The density and viscosity of unloaded and CO2-loaded solutions were measured at temperatures between 20 and 80 °C and fitted to simplified correlations. Based on a thermal degradation test, both solvents were found to be more stable and less corrosive than 30 mass% MEA. However, oxidative degradation tests indicate that the 1-(2HE)PRLD degradation rate is lower than that of 30 mass% MEA while 2-PPE degrades much faster. From the environmental aspect, both solvents are found to be non-toxic and biodegradable in fresh water. These experimental data will be used for estimation of the energetic and environmental potential as solvents for CO2 capture.