Volume 40, Issue 12 pp. 2339-2345
Research Article

Absorption of CO2 with Amino Acid-Based Ionic Liquids and Corresponding Amino Acid Precursors

Javier Guzmán

Javier Guzmán

Instituto Mexicano del Petróleo, Gerencia de Refinación de Hidrocarburos, Eje Central Lázaro Cárdenas 152, 07730 Mexico City, Mexico

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Christian Ortega-Guevara

Christian Ortega-Guevara

Instituto Mexicano del Petróleo, Gerencia de Refinación de Hidrocarburos, Eje Central Lázaro Cárdenas 152, 07730 Mexico City, Mexico

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Roberto García de León

Roberto García de León

Instituto Mexicano del Petróleo, Gerencia de Refinación de Hidrocarburos, Eje Central Lázaro Cárdenas 152, 07730 Mexico City, Mexico

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Rafael Martínez-Palou

Corresponding Author

Rafael Martínez-Palou

Instituto Mexicano del Petróleo, Gerencia de Transformación de Biomasa, Eje Central Lázaro Cárdenas 152, 07730 Mexico City, Mexico

Correspondence: Rafael Martínez-Palou ([email protected]), Instituto Mexicano del Petróleo, Gerencia de Transformación de Biomasa, Eje Central Lázaro Cárdenas 152, 07730 Mexico City, Mexico.Search for more papers by this author
First published: 07 August 2017
Citations: 20

Abstract

A comparative study for CO2 absorption among amino acids (AAs) and ionic liquids (ILs) containing tetramethylammonium [TMA] and tetrabutylphosphonium [TBP] as cations and the corresponding deprotonated amino acid as anions, namely, [TMA][AA] and [TBP][AA], is reported. Amino acids show an excellent performance for CO2 capture, better than the corresponding [TMA][AA], but AAs are less efficient than [TBP][AA]. In addition, [TBP][AA] present faster kinetics of absorption than the corresponding AA. [TBP][lysinate] exhibits the highest CO2 absorption capacity. A novel and fast method with low energy demand for microwave-assisted regeneration of the absorbents from the CO2-saturated solution is also described for the first time.

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