Documents disponibles écrits par cet auteur

New amines for CO2 capture. I. mechanisms of amine degradation in the presence of CO2 / Helene Lepaumier in Industrial & engineering chemistry research, Vol. 48 N° 20 (Octobre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. Titre : New amines for CO2 capture. I. mechanisms of amine degradation in the presence of CO2 Type de document : texte imprimé Auteurs : Helene Lepaumier, Auteur ; Dominique Picq, Auteur ; Pierre-Louis Carrette, Auteur Année de publication : 2010 Article en page(s) : pp. Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Amines  CO2  Ethanolamines Résumé : Degradation of 12 different amines with CO2 was evaluated in 100 mL stainless steel batch reactors for 15 days at 140 °C using a 4 mol·kg−1 amine solution and a CO2 pressure of 2 MPa. At the end of the run, most of degradation products were identified by gas chromatography (GC)/mass spectrometry (MS); amounts of starting amine and its degradation products were determined with a quantitative GC method. This work compares the degradation of ethanolamines (including MEA) having one or two hydroxyl groups with the degradation of ethylenediamines. They were chosen to establish relationships between amine structure and stability properties: replacement of one alcohol function by one amine function, effect of amine function nature, impact of steric hindrance and cyclic structure. Significant differences were observed. The main degradation products are described, and some mechanisms are proposed to explain their formation. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900472x [article] New amines for CO2 capture. I. mechanisms of amine degradation in the presence of CO2 [texte imprimé] / Helene Lepaumier, Auteur ; Dominique Picq, Auteur ; Pierre-Louis Carrette, Auteur . - 2010 . - pp. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. Mots-clés : Amines  CO2  Ethanolamines Résumé : Degradation of 12 different amines with CO2 was evaluated in 100 mL stainless steel batch reactors for 15 days at 140 °C using a 4 mol·kg−1 amine solution and a CO2 pressure of 2 MPa. At the end of the run, most of degradation products were identified by gas chromatography (GC)/mass spectrometry (MS); amounts of starting amine and its degradation products were determined with a quantitative GC method. This work compares the degradation of ethanolamines (including MEA) having one or two hydroxyl groups with the degradation of ethylenediamines. They were chosen to establish relationships between amine structure and stability properties: replacement of one alcohol function by one amine function, effect of amine function nature, impact of steric hindrance and cyclic structure. Significant differences were observed. The main degradation products are described, and some mechanisms are proposed to explain their formation. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900472x

New amines for CO2 capture. II. oxidative degradation mechanisms / Helene Lepaumier in Industrial & engineering chemistry research, Vol. 48 N° 20 (Octobre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9068–9075 Titre : New amines for CO2 capture. II. oxidative degradation mechanisms Type de document : texte imprimé Auteurs : Helene Lepaumier, Auteur ; Dominique Picq, Auteur ; Pierre-Louis Carrette, Auteur Année de publication : 2010 Article en page(s) : pp. 9068–9075 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Ethylenediamines  Ethanolamines  Oxidative  degradation Résumé : This study examines oxidative degradation of 12 ethanolamines and ethylenediamines. They were chosen to establish structure−property relationships: the role of replacement of the alcohol function by one second amine function, amine nature, steric hindrance, and cyclic structure were studied. Degradation of aqueous amine solutions was evaluated at 140 °C under air pressure (2 MPa) in stainless steel reactors for 15 days. At the end of the run, most degradation products were identified by gas chromatography (GC)/mass spectrometry (MS); amounts of remaining amine and its degradation products were determined with the quantitative GC method. Main degradation mechanisms are proposed, and some relationships between structure and chemical stability are given. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9004749 [article] New amines for CO2 capture. II. oxidative degradation mechanisms [texte imprimé] / Helene Lepaumier, Auteur ; Dominique Picq, Auteur ; Pierre-Louis Carrette, Auteur . - 2010 . - pp. 9068–9075. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9068–9075 Mots-clés : Ethylenediamines  Ethanolamines  Oxidative  degradation Résumé : This study examines oxidative degradation of 12 ethanolamines and ethylenediamines. They were chosen to establish structure−property relationships: the role of replacement of the alcohol function by one second amine function, amine nature, steric hindrance, and cyclic structure were studied. Degradation of aqueous amine solutions was evaluated at 140 °C under air pressure (2 MPa) in stainless steel reactors for 15 days. At the end of the run, most degradation products were identified by gas chromatography (GC)/mass spectrometry (MS); amounts of remaining amine and its degradation products were determined with the quantitative GC method. Main degradation mechanisms are proposed, and some relationships between structure and chemical stability are given. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9004749

New amines for CO2 capture. III. effect of alkyl chain length between amine functions on polyamines degradation / Helene Lepaumier in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4553-4560 Titre : New amines for CO2 capture. III. effect of alkyl chain length between amine functions on polyamines degradation Type de document : texte imprimé Auteurs : Helene Lepaumier, Auteur ; Sandrine Martin, Auteur Année de publication : 2010 Article en page(s) : pp. 4553-4560 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Carbon  dioxide Résumé : This study examines degradation of five tertiary polyamines (di- and triamines) in the presence of CO2 or O2. They were chosen to identify the impact of alkyl chain length between amine functions. Degradation of aqueous amine solutions was evaluated at 140 °C under CO2 or air pressure (2 MPa) in stainless steel batch reactors for 15 days. At the end of the run, most degradation products were identified by gas chromatography (GC)/mass spectrometry; amounts of remaining amine and its degradation products were determined with a quantitative GC method. The main degradation mechanisms are proposed, and some structure−properties relationships are established. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22797443 [article] New amines for CO2 capture. III. effect of alkyl chain length between amine functions on polyamines degradation [texte imprimé] / Helene Lepaumier, Auteur ; Sandrine Martin, Auteur . - 2010 . - pp. 4553-4560. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4553-4560 Mots-clés : Carbon  dioxide Résumé : This study examines degradation of five tertiary polyamines (di- and triamines) in the presence of CO2 or O2. They were chosen to identify the impact of alkyl chain length between amine functions. Degradation of aqueous amine solutions was evaluated at 140 °C under CO2 or air pressure (2 MPa) in stainless steel batch reactors for 15 days. At the end of the run, most degradation products were identified by gas chromatography (GC)/mass spectrometry; amounts of remaining amine and its degradation products were determined with a quantitative GC method. The main degradation mechanisms are proposed, and some structure−properties relationships are established. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22797443

New amines for CO2 capture. IV. degradation, corrosion, and quantitative structure property relationship model / Sandrine Martin in Industrial & engineering chemistry research, Vol. 51 N° 18 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6283–6289 Titre : New amines for CO2 capture. IV. degradation, corrosion, and quantitative structure property relationship model Type de document : texte imprimé Auteurs : Sandrine Martin, Auteur ; Helene Lepaumier, Auteur ; Dominique Picq, Auteur Année de publication : 2012 Article en page(s) : pp. 6283–6289 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Amines  Corrosion Résumé : Degradation of 22 compounds was evaluated in stainless steel batch reactors at 140 °C for 14 days under a pressure of 0.5 MPa (mixture of 75% CO2, 20% N2, and 5% O2). For each run, two corrosion coupons, one carbon steel (XC38) and one stainless steel (304Ti), were immersed in aqueous solutions of amines to determine corrosion due to degraded solutions. Two additional coupons were put in the vapor phase above solutions. At the end of the run, corrosion rates were evaluated through weight-loss measurements. The amounts of remaining starting material were determined with a quantitative gas chromatography method. Corrosion and degradation data were compared with those of a benchmark molecule (MEA, monoethanolamine), tested under the same conditions. Results indicate that some molecules are less corrosive and have a better chemical stability than MEA. In addition, a quantitative structure property relationship (QSPR) model was built that can be applied to predict compound degradation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2029877 [article] New amines for CO2 capture. IV. degradation, corrosion, and quantitative structure property relationship model [texte imprimé] / Sandrine Martin, Auteur ; Helene Lepaumier, Auteur ; Dominique Picq, Auteur . - 2012 . - pp. 6283–6289. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6283–6289 Mots-clés : Amines  Corrosion Résumé : Degradation of 22 compounds was evaluated in stainless steel batch reactors at 140 °C for 14 days under a pressure of 0.5 MPa (mixture of 75% CO2, 20% N2, and 5% O2). For each run, two corrosion coupons, one carbon steel (XC38) and one stainless steel (304Ti), were immersed in aqueous solutions of amines to determine corrosion due to degraded solutions. Two additional coupons were put in the vapor phase above solutions. At the end of the run, corrosion rates were evaluated through weight-loss measurements. The amounts of remaining starting material were determined with a quantitative gas chromatography method. Corrosion and degradation data were compared with those of a benchmark molecule (MEA, monoethanolamine), tested under the same conditions. Results indicate that some molecules are less corrosive and have a better chemical stability than MEA. In addition, a quantitative structure property relationship (QSPR) model was built that can be applied to predict compound degradation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2029877

Understanding 2-ethanolamine degradation in postcombustion CO2 capture / Eirik F. Da Silva in Industrial & engineering chemistry research, Vol. 51 N° 41 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 41 (Octobre 2012) . - pp. 13329-13338 Titre : Understanding 2-ethanolamine degradation in postcombustion CO2 capture Type de document : texte imprimé Auteurs : Eirik F. Da Silva, Auteur ; Helene Lepaumier, Auteur ; Andreas Grimstvedt, Auteur Année de publication : 2012 Article en page(s) : pp. 13329-13338 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Carbon  dioxide Résumé : 2-Ethanolamine (MEA) degradation has been studied under varying conditions of relevance to postcombustion CO2 capture. Degradation experiments performed in the laboratory were chosen to be representative of the conditions in a CO2 capture plant facility. The thermal degradation of MEA was investigated in closed-batch experiments at 135 °C at different loadings. MEA degradation was also studied in oxidative conditions without additives or by adding FeSO4/fly ash. These experiments were compared with three MEA campaigns performed in pilot plants at Tiller (Norway), Esbjerg (Denmark), and Longannet (U.K.). The same analytical procedures were used to identify and quantify the main degradation compounds. Mechanisms are also proposed to account for the observed degradation products. For the Tiller campaign 99.7% of nitrogen containing compounds in the liquid at the end of the campaign was accounted for by the solvent and quantified degradation products. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26493627 [article] Understanding 2-ethanolamine degradation in postcombustion CO2 capture [texte imprimé] / Eirik F. Da Silva, Auteur ; Helene Lepaumier, Auteur ; Andreas Grimstvedt, Auteur . - 2012 . - pp. 13329-13338. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 41 (Octobre 2012) . - pp. 13329-13338 Mots-clés : Carbon  dioxide Résumé : 2-Ethanolamine (MEA) degradation has been studied under varying conditions of relevance to postcombustion CO2 capture. Degradation experiments performed in the laboratory were chosen to be representative of the conditions in a CO2 capture plant facility. The thermal degradation of MEA was investigated in closed-batch experiments at 135 °C at different loadings. MEA degradation was also studied in oxidative conditions without additives or by adding FeSO4/fly ash. These experiments were compared with three MEA campaigns performed in pilot plants at Tiller (Norway), Esbjerg (Denmark), and Longannet (U.K.). The same analytical procedures were used to identify and quantify the main degradation compounds. Mechanisms are also proposed to account for the observed degradation products. For the Tiller campaign 99.7% of nitrogen containing compounds in the liquid at the end of the campaign was accounted for by the solvent and quantified degradation products. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26493627