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Kinetics of carbon dioxide removal by aqueous alkaline amino acid salts / Prakash D. Vaidya in Industrial & engineering chemistry research, Vol. 49 N° 21 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 11067–11072 Titre : Kinetics of carbon dioxide removal by aqueous alkaline amino acid salts Type de document : texte imprimé Auteurs : Prakash D. Vaidya, Auteur ; Prashanti Konduru, Auteur ; Mukanth Vaidyanathan, Auteur Année de publication : 2011 Article en page(s) : pp. 11067–11072 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Kinetics  Aqueous  alkaline Résumé : Aqueous solutions containing alkaline salts of carboxylic or sulfonic amino acids represent candidate solvents with good potential for carbon dioxide (CO2) capture. In the present work, the CO2 reactions with potassium salts of glycine (aminoacetic acid) and taurine (2-aminoethanesulfonic acid) in aqueous solutions are investigated using a stirred-cell reactor. The reaction pathways are comprehensively described using the zwitterion and the termolecular mechanism. The investigated reactions belong to the fast pseudo-first-order reaction regime systems. The second-order rate constant for the CO2 reaction with potassium glycinate is determined, and its value at 303 K is evaluated to be 6.29 m3/(mol s). The liquid-side mass-transfer coefficient is estimated, and its value (0.006 cm/s) is consistent with those typical for stirred-cell reactors. Finally, it is determined that potassium glycinate promotes the activity of tertiary amines (e.g., N,N-diethylethanolamine). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100224f [article] Kinetics of carbon dioxide removal by aqueous alkaline amino acid salts [texte imprimé] / Prakash D. Vaidya, Auteur ; Prashanti Konduru, Auteur ; Mukanth Vaidyanathan, Auteur . - 2011 . - pp. 11067–11072. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 11067–11072 Mots-clés : Kinetics  Aqueous  alkaline Résumé : Aqueous solutions containing alkaline salts of carboxylic or sulfonic amino acids represent candidate solvents with good potential for carbon dioxide (CO2) capture. In the present work, the CO2 reactions with potassium salts of glycine (aminoacetic acid) and taurine (2-aminoethanesulfonic acid) in aqueous solutions are investigated using a stirred-cell reactor. The reaction pathways are comprehensively described using the zwitterion and the termolecular mechanism. The investigated reactions belong to the fast pseudo-first-order reaction regime systems. The second-order rate constant for the CO2 reaction with potassium glycinate is determined, and its value at 303 K is evaluated to be 6.29 m3/(mol s). The liquid-side mass-transfer coefficient is estimated, and its value (0.006 cm/s) is consistent with those typical for stirred-cell reactors. Finally, it is determined that potassium glycinate promotes the activity of tertiary amines (e.g., N,N-diethylethanolamine). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100224f