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The way for improving the efficiency of ammonia and carbon dioxide absorption of choline chloride: Urea mixtures by modifying a choline cation by Olga V. Kazarina; Anton N. Petukhov; Andrey V. Vorotyntsev; Maria E. Atlaskina; Artem A. Atlaskin; Alexander S. Kazarin; Anna A. Golovacheva; Natalia A. Sedova; Artyom N. Markov; Sergey S. Suvorov; Alexandra V. Barysheva; Ilya V. Vorotyntsev is a Engineering article available to read on EtoBox.
What is The way for improving the efficiency of ammonia and carbon dioxide absorption of choline chloride: Urea mixtures by modifying a choline cation about?
In the current work, two novel systems formed by chlorides of choline family (ChCl), namely ammonium salts with 2-hydroxyethyl and 2-(2-hydroxyethoxy)ethyl substituents, and urea (U) in a molar ratio 1 : 1 were obtained. Their densities (ρ), viscosities (η), refractive indices (n D) and properties related to the carbon dioxide and ammonia absorption were carefully investigated in a wide temperature range. The solubilities of NH3 and CO2 in the prepared mixtures at T = (303.2–333.2) K and p = (100–639) kPa were measured and linear correlation were used for fitting the experimental data. Based on this, the Henry's law constants both in a molality ( H m ) and in a molar fraction scales ( H x ), and the changes of enthalpy ( Δ sol H ∘ ), Gibbs free energy ( Δ sol G ∘ ) and entropy ( Δ sol S ∘ ) during the absorption process were calculated. The absorption capacity at 313.2 K and 101 kPa of the mixtures comprising new OH-grafted hydrogen bond acceptors (HBA) were found to be higher by 60% for NH3 and 17% for CO2 when one methyl in choline cation is exchanged by a 2-hydroxyethyl group, by 103% for NH3 and 27% for CO2 when two methyls are exchanged by two 2-hydroxyethyl groups, by 9% for
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- Author
- Olga V. Kazarina; Anton N. Petukhov; Andrey V. Vorotyntsev; Maria E. Atlaskina; Artem A. Atlaskin; Alexander S. Kazarin; Anna A. Golovacheva; Natalia A. Sedova; Artyom N. Markov; Sergey S. Suvorov; Alexandra V. Barysheva; Ilya V. Vorotyntsev
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)