Documents disponibles écrits par cet auteur

Comparative mass transfer performance studies of CO2 absorption into aqueous solutions of DEAB and MEA / Kreangkrai Maneeintr in Industrial & engineering chemistry research, Vol. 49 N° 6 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2857–2863 Titre : Comparative mass transfer performance studies of CO2 absorption into aqueous solutions of DEAB and MEA Type de document : texte imprimé Auteurs : Kreangkrai Maneeintr, Auteur ; Raphael O. Idem, Auteur ; Paitoon Tontiwachwuthikul, Auteur Année de publication : 2010 Article en page(s) : pp. 2857–2863 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Comparative;  Performance;  Absorption;  Aqueous  Solutions;  CO2;  DEAB;  MEA Résumé : The mass transfer performance of the absorption of CO2 in an aqueous solution of a new amino alcohol, 4-diethylamino-2-butanol (DEAB), which has been developed as an effective postcombustion CO2 capture solvent, was investigated and compared with the performance of CO2 absorption in a conventional amine, MEA. The absorption experiments were conducted in an absorption column containing structured packing, whereas the absorption performance was evaluated in terms of the overall mass transfer coefficient, KGav. In particular, the effects of parameters such as inert gas flow rate, liquid flow rate, and solution concentration were compared for both DEAB and MEA. The results show that KGav increases as both the liquid flow rate and concentration of solution increase whereas inert gas flow rate has little or no effect on KGav. An empirical correlation for the mass transfer coefficient for the CO2-DEAB system has been developed as a function of the process parameters. In terms of comparison, the results show that the mass transfer performance of MEA was greater than that of DEAB. However, with the extremely high solubility and ease of regeneration of DEAB based on our previous study, it may be extremely beneficial to formulate an absorption solvent involving both MEA and DEAB in order to take advantage of the synergy effects of high solubility, ease of regeneration as well as the high mass transfer performance of the mixture. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900540v [article] Comparative mass transfer performance studies of CO2 absorption into aqueous solutions of DEAB and MEA [texte imprimé] / Kreangkrai Maneeintr, Auteur ; Raphael O. Idem, Auteur ; Paitoon Tontiwachwuthikul, Auteur . - 2010 . - pp. 2857–2863. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2857–2863 Mots-clés : Comparative;  Performance;  Absorption;  Aqueous  Solutions;  CO2;  DEAB;  MEA Résumé : The mass transfer performance of the absorption of CO2 in an aqueous solution of a new amino alcohol, 4-diethylamino-2-butanol (DEAB), which has been developed as an effective postcombustion CO2 capture solvent, was investigated and compared with the performance of CO2 absorption in a conventional amine, MEA. The absorption experiments were conducted in an absorption column containing structured packing, whereas the absorption performance was evaluated in terms of the overall mass transfer coefficient, KGav. In particular, the effects of parameters such as inert gas flow rate, liquid flow rate, and solution concentration were compared for both DEAB and MEA. The results show that KGav increases as both the liquid flow rate and concentration of solution increase whereas inert gas flow rate has little or no effect on KGav. An empirical correlation for the mass transfer coefficient for the CO2-DEAB system has been developed as a function of the process parameters. In terms of comparison, the results show that the mass transfer performance of MEA was greater than that of DEAB. However, with the extremely high solubility and ease of regeneration of DEAB based on our previous study, it may be extremely beneficial to formulate an absorption solvent involving both MEA and DEAB in order to take advantage of the synergy effects of high solubility, ease of regeneration as well as the high mass transfer performance of the mixture. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900540v

Corrosion behavior of carbon steel in the monoethanolamine−H2O−CO2−O2−SO2 system / Nattawan Kladkaew in Industrial & engineering chemistry research, Vol. 48 N° 19 (Octobre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 19 (Octobre 2009) . - pp. 8913–8919 Titre : Corrosion behavior of carbon steel in the monoethanolamine−H2O−CO2−O2−SO2 system Type de document : texte imprimé Auteurs : Nattawan Kladkaew, Auteur ; Raphael Idem, Auteur ; Paitoon Tontiwachwuthikul, Auteur Année de publication : 2009 Article en page(s) : pp. 8913–8919 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Carbon  steel  Corrosion  Monoethanolamine−H2O−CO2−O2−SO2  system Résumé : The effects of operating parameters on the corrosion of carbon steel in the monoethanolamine (MEA)−H2O−CO2−O2−SO2 system were investigated using two different corrosion measurement techniques. The corrosion studies were conducted using a 273A potentiostat using MEA, O2, and SO2 concentrations and CO2 loading in the ranges of 1−7 kmol/m3, 0−100%, 0−204 ppm, and 0−0.5 mol CO2/mol MEA, respectively, at corrosion temperatures in the range of 303−353 K. The experimental results showed, for the first time, that a higher concentration of SO2 in a simulated flue gas stream induces a higher corrosion rate essentially because of the increase in the hydrogen ion concentration generated by reactions of SO2 and H2O as well as SO2, O2, and H2O. Also, an increase in oxygen concentration in the simulated flue gas stream causes a higher corrosion rate due to the increasing solubility of oxygen and, in turn, a higher amount of dissolved oxygen in the liquid phase. The results further show that an increase in the concentrations of MEA, O2, and SO2 as well as CO2 loading will cause the generation of higher amounts of hydrogen or hydronium ions, as well as carbonic acid and bicarbonate ions, and this is what leads to a higher corrosion rate. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9007453 [article] Corrosion behavior of carbon steel in the monoethanolamine−H2O−CO2−O2−SO2 system [texte imprimé] / Nattawan Kladkaew, Auteur ; Raphael Idem, Auteur ; Paitoon Tontiwachwuthikul, Auteur . - 2009 . - pp. 8913–8919. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 19 (Octobre 2009) . - pp. 8913–8919 Mots-clés : Carbon  steel  Corrosion  Monoethanolamine−H2O−CO2−O2−SO2  system Résumé : The effects of operating parameters on the corrosion of carbon steel in the monoethanolamine (MEA)−H2O−CO2−O2−SO2 system were investigated using two different corrosion measurement techniques. The corrosion studies were conducted using a 273A potentiostat using MEA, O2, and SO2 concentrations and CO2 loading in the ranges of 1−7 kmol/m3, 0−100%, 0−204 ppm, and 0−0.5 mol CO2/mol MEA, respectively, at corrosion temperatures in the range of 303−353 K. The experimental results showed, for the first time, that a higher concentration of SO2 in a simulated flue gas stream induces a higher corrosion rate essentially because of the increase in the hydrogen ion concentration generated by reactions of SO2 and H2O as well as SO2, O2, and H2O. Also, an increase in oxygen concentration in the simulated flue gas stream causes a higher corrosion rate due to the increasing solubility of oxygen and, in turn, a higher amount of dissolved oxygen in the liquid phase. The results further show that an increase in the concentrations of MEA, O2, and SO2 as well as CO2 loading will cause the generation of higher amounts of hydrogen or hydronium ions, as well as carbonic acid and bicarbonate ions, and this is what leads to a higher corrosion rate. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9007453

Corrosion Behavior of Carbon Steel in the Monoethanolamine−H2O−CO2−O2−SO2 System: Products, Reaction Pathways, and Kinetics / Nattawan Kladkaew in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10169–10179 Titre : Corrosion Behavior of Carbon Steel in the Monoethanolamine−H2O−CO2−O2−SO2 System: Products, Reaction Pathways, and Kinetics Type de document : texte imprimé Auteurs : Nattawan Kladkaew, Auteur ; Raphael Idem, Auteur ; Paitoon Tontiwachwuthikul, Auteur Année de publication : 2010 Article en page(s) : pp. 10169–10179 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Corrosion  Behavior--Carbon  Steel--Monoethanolamine−H2O−CO2−O2−SO2--System--Products--Reaction--Pathways--Kinetics Résumé : This work investigates the effect of operating parameters on corrosion products, reaction pathways, and kinetics for the corrosion of carbon steel in the monoethanolamine−H2O−CO2−O2−SO2 system. Corrosion experiments were conducted using a 273A potentiostat unit under conditions in which monoethanolamine (MEA), O2, and SO2 concentrations and CO2 loading were in the range of 1−7 kmol/m3, 0−100%, 0−204 ppm, and 0−0.5 mol CO2/mol MEA, respectively, at corrosion temperatures of 303−353 K to mimic the absorption−regeneration sections. Analysis, performed for this system for the first time, shows that corrosion products generated from the effect of SO2 include FeSO4 and Fe2O3·H2O. Also, a higher concentration of SO2 in simulated flue gas stream induces a higher corrosion rate because of the increase in the hydrogen ion concentration generated by reactions of SO2 and H2O as well as SO2, O2, and H2O. A power-law model developed to correlate corrosion rate with the parameters in the MEA−H2O−CO2−O2−SO2 system shows that corrosion rate of carbon steel increases with an increase in O2 and SO2 concentrations in simulated flue gas stream, as well as MEA concentration, CO2 loading, and operating temperature. It was observed that CO2 loading had the highest impact on the corrosion rate, while SO2 and O2 show only slight effects on the corrosion rate. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900877p [article] Corrosion Behavior of Carbon Steel in the Monoethanolamine−H2O−CO2−O2−SO2 System: Products, Reaction Pathways, and Kinetics [texte imprimé] / Nattawan Kladkaew, Auteur ; Raphael Idem, Auteur ; Paitoon Tontiwachwuthikul, Auteur . - 2010 . - pp. 10169–10179. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10169–10179 Mots-clés : Corrosion  Behavior--Carbon  Steel--Monoethanolamine−H2O−CO2−O2−SO2--System--Products--Reaction--Pathways--Kinetics Résumé : This work investigates the effect of operating parameters on corrosion products, reaction pathways, and kinetics for the corrosion of carbon steel in the monoethanolamine−H2O−CO2−O2−SO2 system. Corrosion experiments were conducted using a 273A potentiostat unit under conditions in which monoethanolamine (MEA), O2, and SO2 concentrations and CO2 loading were in the range of 1−7 kmol/m3, 0−100%, 0−204 ppm, and 0−0.5 mol CO2/mol MEA, respectively, at corrosion temperatures of 303−353 K to mimic the absorption−regeneration sections. Analysis, performed for this system for the first time, shows that corrosion products generated from the effect of SO2 include FeSO4 and Fe2O3·H2O. Also, a higher concentration of SO2 in simulated flue gas stream induces a higher corrosion rate because of the increase in the hydrogen ion concentration generated by reactions of SO2 and H2O as well as SO2, O2, and H2O. A power-law model developed to correlate corrosion rate with the parameters in the MEA−H2O−CO2−O2−SO2 system shows that corrosion rate of carbon steel increases with an increase in O2 and SO2 concentrations in simulated flue gas stream, as well as MEA concentration, CO2 loading, and operating temperature. It was observed that CO2 loading had the highest impact on the corrosion rate, while SO2 and O2 show only slight effects on the corrosion rate. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900877p