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CO2 Solubility in a mixture absorption system of 2 - Amino - 2 - methyl - 1 - propanol with glycol / C. Zheng in Industrial & engineering chemistry research, Vol. 51 N° 34 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 34 (Août 2012) . - pp. 11236-11244 Titre : CO2 Solubility in a mixture absorption system of 2 - Amino - 2 - methyl - 1 - propanol with glycol Type de document : texte imprimé Auteurs : C. Zheng, Auteur ; J. Tan, Auteur ; Y. J. Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 11236-11244 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Solubility  Carbon  dioxide Résumé : A mixture system of sterically hindered amine 2-amioo-2-methyl-1-propanol (AMP) with glycol was developed as the working system to reduce energy consumption. The solubility of CO2 in the mixture solutions of AMP―diethylene glycol (DEG) and AMP―triethylene glycol (TEG) was determined by a fast measurement method. The results show that the physical absorption can be enhanced using TEG or DEG as a solvent The heat of absorption of the CO2―AMP―glycol system ranges from 50 kJ/(mol CO2) to 62 kj/(mol CO2) as the loading of CO2 (mol CO2/mol AMP) ranges from 0.2 to 0.8, which is much lower than that between monoethanolamine (MEA) and CO2. The absorption performance of the mixture system is sensitive both to temperature and pressure, which is different from the process with MEA as an absorbent. A reaction assumption of AMP with CO2 in DEG or TEG was suggested and a model for predicting the solubility of CO, is developed accordingly. The prediction results show that the model can predict the absorption performance well. Comparing the MEA―TEG and AMP-TEG systems, we found that the AMP―TEG system would have much lower energy consumption in the CO2 absorption-regeneration process than the MEA―TEG absorption system. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26299449 [article] CO2 Solubility in a mixture absorption system of 2 - Amino - 2 - methyl - 1 - propanol with glycol [texte imprimé] / C. Zheng, Auteur ; J. Tan, Auteur ; Y. J. Wang, Auteur . - 2012 . - pp. 11236-11244. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 34 (Août 2012) . - pp. 11236-11244 Mots-clés : Solubility  Carbon  dioxide Résumé : A mixture system of sterically hindered amine 2-amioo-2-methyl-1-propanol (AMP) with glycol was developed as the working system to reduce energy consumption. The solubility of CO2 in the mixture solutions of AMP―diethylene glycol (DEG) and AMP―triethylene glycol (TEG) was determined by a fast measurement method. The results show that the physical absorption can be enhanced using TEG or DEG as a solvent The heat of absorption of the CO2―AMP―glycol system ranges from 50 kJ/(mol CO2) to 62 kj/(mol CO2) as the loading of CO2 (mol CO2/mol AMP) ranges from 0.2 to 0.8, which is much lower than that between monoethanolamine (MEA) and CO2. The absorption performance of the mixture system is sensitive both to temperature and pressure, which is different from the process with MEA as an absorbent. A reaction assumption of AMP with CO2 in DEG or TEG was suggested and a model for predicting the solubility of CO, is developed accordingly. The prediction results show that the model can predict the absorption performance well. Comparing the MEA―TEG and AMP-TEG systems, we found that the AMP―TEG system would have much lower energy consumption in the CO2 absorption-regeneration process than the MEA―TEG absorption system. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26299449

Intensification of catalytic oxidation with a T-junction microchannel reactor for deep desulfurization / D. Huang in Industrial & engineering chemistry research, Vol. 47 n°11 (Juin 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°11 (Juin 2008) . - p. 3870–3875 Titre : Intensification of catalytic oxidation with a T-junction microchannel reactor for deep desulfurization Type de document : texte imprimé Auteurs : D. Huang, Auteur ; Y. C. Lu, Auteur ; Y. J. Wang, Auteur ; L. Yang, Auteur Année de publication : 2008 Article en page(s) : p. 3870–3875 Note générale : Bibliogr. p. 3874-3875 Langues : Anglais (eng) Mots-clés : Microreactor  system;  Dibenzothiophene;  Deep  desulfurization Résumé : In this paper, a microreactor system is developed to enhance the oxidation of dibenzothiophene (DBT) and 4,6-DMDBT for deep desulfurization with the oxidant of hydrogen peroxide. A T-junction microchannel was applied to form the aqueous slug flow and a long PTFE (polytetrafluoroethylene) capillary with an inner diameter of 1 mm was connected directly downstream to maintain the two-phase dispersion condition. Surfactant of octadecyltrimethyl ammonium bromide (STAB) and phosphotungstic acid (TPA) were mixed in the microchannel to form the combined amphiphilic catalyst directly. The parameters affecting slug formation and DBT oxidation were investigated, including two-phase flow rates, temperature, surfactant type, and catalyst concentrations. DBT conversion of 97% was achieved with a residence time of 1.3 min at 60 °C. Furthermore, 4,6-DMDBT could also be effectively oxidized, and increasing the reaction temperature from 25 to 70 °C led to a substantial increase in 4,6-DMDBT conversions, from 57% at 25 °C to 97% at 70 °C. This T-junction microchannel reactor is far superior to the conventional equipment in terms of providing more interfacial area with much less power input. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701781r [article] Intensification of catalytic oxidation with a T-junction microchannel reactor for deep desulfurization [texte imprimé] / D. Huang, Auteur ; Y. C. Lu, Auteur ; Y. J. Wang, Auteur ; L. Yang, Auteur . - 2008 . - p. 3870–3875. Bibliogr. p. 3874-3875 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°11 (Juin 2008) . - p. 3870–3875 Mots-clés : Microreactor  system;  Dibenzothiophene;  Deep  desulfurization Résumé : In this paper, a microreactor system is developed to enhance the oxidation of dibenzothiophene (DBT) and 4,6-DMDBT for deep desulfurization with the oxidant of hydrogen peroxide. A T-junction microchannel was applied to form the aqueous slug flow and a long PTFE (polytetrafluoroethylene) capillary with an inner diameter of 1 mm was connected directly downstream to maintain the two-phase dispersion condition. Surfactant of octadecyltrimethyl ammonium bromide (STAB) and phosphotungstic acid (TPA) were mixed in the microchannel to form the combined amphiphilic catalyst directly. The parameters affecting slug formation and DBT oxidation were investigated, including two-phase flow rates, temperature, surfactant type, and catalyst concentrations. DBT conversion of 97% was achieved with a residence time of 1.3 min at 60 °C. Furthermore, 4,6-DMDBT could also be effectively oxidized, and increasing the reaction temperature from 25 to 70 °C led to a substantial increase in 4,6-DMDBT conversions, from 57% at 25 °C to 97% at 70 °C. This T-junction microchannel reactor is far superior to the conventional equipment in terms of providing more interfacial area with much less power input. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701781r