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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Yu, Hai
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (2/2 displayed)
- 2018Development and Evaluation of a Novel Method for Determining Absorbent Composition in Aqueous Ammonia-based CO2 and SO32- and SO42- Loaded Capture Process Solutions via FT-IR Spectroscopycitations
- 2017Kinetic and Equilibrium Reactions of a New Heterocyclic Aqueous 4-aminomethyltetrahydropyran (4-AMTHP) Absorbent for Post Combustion Carbon Dioxide (CO¬2) Capture Processescitations
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article
Kinetic and Equilibrium Reactions of a New Heterocyclic Aqueous 4-aminomethyltetrahydropyran (4-AMTHP) Absorbent for Post Combustion Carbon Dioxide (CO¬2) Capture Processes
Abstract
Aqueous amine absorbent processes remain at the forefront of existing technologies for the removal of CO2 from industrial and large scale power generation flue gas streams. It is essential that improvements in amine-based absorbent technologies are made in order to reduce both capital and operational costs. Intimate understanding of the fundamental chemical behaviour of new amine absorbents systems is an intelligent pathway towards higher efficiency amine based CO2 capture processes.Herein we investigate and report for the first time the complete temperature-dependent kinetic and equilibrium behaviour of a new heterocyclic amine 4-aminomethyltetrahydropyran (4-AMTHP), with CO2, in aqueous solutions. Stopped-flow spectrophotometry, 1H NMR spectroscopy, and potentiometric titration measurements have been performed over the temperature range 25.0 – 45.0oC and the corresponding rate constants for the reversible formation of the carbamic acid, together with equilibrium constants describing the stability of the carbamate, and the protonation of the amine, reported here. Thermodynamic analysis of the resulting constants using the Eyring, Arrhenius, and van’t Hoff relationships has revealed the activation energies, enthalpies, and entropies for the reactions allowing a comparison to the industrial standard monoethanolamine (MEA). From the kinetic data the performance of 4-AMTHP was found to be superior to MEA and in line with the established Brønsted relationship between the second order rate constant and the protonation constant or basicity of the amine. The largely negative protonation enthalpy (-47 kJ/mol), among the key chemical drivers for CO2 regeneration, is again superior to MEA (-41 kJ/mol). Together the combination of kinetic and equilibrium properties of 4-AMTHP strongly position 4-AMTHP as a promising candidate for more intensive evaluations as a CO2 capture absorbent.