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- W2619248766 abstract "Novel absorbents with improved characteristics are required to reduce the existing cost and environmental barriers to deployment of large scale CO2 capture. Recently, bespoke absorbent molecules have been specifically designed for CO2 capture applications, and their fundamental properties and suitability for CO2 capture processes evaluated. From the study, two unique diamine molecules, 4-(2-hydroxyethylamino)piperidine (A4) and 1-(2-hydroxyethyl)-4-aminopiperidine (C4), were selected for further evaluation including thermodynamic characterization. The solubilities of CO2 in two diamine solutions with a mass fraction of 15% and 30% were measured at different temperatures (313.15–393.15 K) and CO2 partial pressures (up to 400 kPa) by thermostatic vapor−liquid equilibrium (VLE) stirred cell. The absorption enthalpies of reactions between diamines and CO2 were evaluated at different temperatures (313.15 and 333.15 K) using a CPA201 reaction calorimeter. The amine protonation constants and associated protonation enthalpies were determined by potentiometric titration. The interaction of CO2 with the diamine solutions was summarized and a simple mathematical model established that could make a preliminary but good prediction of the VLE and thermodynamic properties. Based on the analyses in this work, the two designer diamines A4 and C4 showed superior performance compared to amines typically used for CO2 capture and further research will be completed at larger scale." @default.
- W2619248766 created "2017-06-05" @default.
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- W2619248766 date "2017-06-12" @default.
- W2619248766 modified "2023-10-10" @default.
- W2619248766 title "Evaluation and Modeling of Vapor–Liquid Equilibrium and CO<sub>2</sub> Absorption Enthalpies of Aqueous Designer Diamines for Post Combustion Capture Processes" @default.
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- W2619248766 doi "https://doi.org/10.1021/acs.est.7b00379" @default.
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