Documents disponibles écrits par cet auteur

Dynamic simulation of sorption enhanced reaction processes for biodiesel production / Ankur Kapil in Industrial & engineering chemistry research, Vol. 49 N° 5 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2326–2335 Titre : Dynamic simulation of sorption enhanced reaction processes for biodiesel production Type de document : texte imprimé Auteurs : Ankur Kapil, Auteur ; Shrikant A. Bhat, Auteur ; Jhuma Sadhukhan, Auteur Année de publication : 2010 Article en page(s) : pp. 2326–2335 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Dynamic  simulation;  Biodiesel;  Sorption  enhanced  reactors;  Fatty  acid  methyl  ester;  Simulated  moving  bed  reactors Résumé : The objective of this work was to establish fixed bed sorption enhanced reactors (SER) and simulated moving bed reactors (SMBR) for the production of high purity biodiesel (fatty acid methyl ester, FAME) using esterification reactions between fatty acids (FA) in used oils and methanol. This study has demonstrated that these processes have tremendous potential in terms of overcoming the low conversion and separation difficulties that are faced in conventional biodiesel production processes. Additionally, the SMBR process operating conditions can be optimized to produce FAME at a desired purity in a continuous mode. The novelty of this work lays in the development of generic and comprehensive dynamic simulation and systematic parametric analysis frameworks. These were used to deduce the following operating conditions for achieving more than 90% conversion of FA and 80% purity of FAME, from an SMBR process: switching time of 900 s, length of 0.25 m, and feed, raffinate, and eluent flow rate ratios of 0.41, 0.49, and 0.75, for a given velocity of 2.4 × 10−4 m/s in the reaction zone. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901225u [article] Dynamic simulation of sorption enhanced reaction processes for biodiesel production [texte imprimé] / Ankur Kapil, Auteur ; Shrikant A. Bhat, Auteur ; Jhuma Sadhukhan, Auteur . - 2010 . - pp. 2326–2335. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2326–2335 Mots-clés : Dynamic  simulation;  Biodiesel;  Sorption  enhanced  reactors;  Fatty  acid  methyl  ester;  Simulated  moving  bed  reactors Résumé : The objective of this work was to establish fixed bed sorption enhanced reactors (SER) and simulated moving bed reactors (SMBR) for the production of high purity biodiesel (fatty acid methyl ester, FAME) using esterification reactions between fatty acids (FA) in used oils and methanol. This study has demonstrated that these processes have tremendous potential in terms of overcoming the low conversion and separation difficulties that are faced in conventional biodiesel production processes. Additionally, the SMBR process operating conditions can be optimized to produce FAME at a desired purity in a continuous mode. The novelty of this work lays in the development of generic and comprehensive dynamic simulation and systematic parametric analysis frameworks. These were used to deduce the following operating conditions for achieving more than 90% conversion of FA and 80% purity of FAME, from an SMBR process: switching time of 900 s, length of 0.25 m, and feed, raffinate, and eluent flow rate ratios of 0.41, 0.49, and 0.75, for a given velocity of 2.4 × 10−4 m/s in the reaction zone. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901225u

Kinetic modeling studies of heterogeneously catalyzed biodiesel synthesis reactions / Ankur Kapil in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 4818-4830 Titre : Kinetic modeling studies of heterogeneously catalyzed biodiesel synthesis reactions Type de document : texte imprimé Auteurs : Ankur Kapil, Auteur ; Karen Wilson, Auteur ; Adam F Lee, Auteur Année de publication : 2011 Article en page(s) : pp. 4818-4830 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Modeling  Catalytic  reaction  Kinetic  model Résumé : The heteeogeneously catalyzed transesterification reaction for the production of biodiesel from triglycerides was investigated for reaction mechanism and kinetic constants. Three elementary reaction mechanisms Eley―Rideal (ER), Langmuir― Hinshelwood―Hougen―Watson (LHHW), and Hattori with assumptions, such as quasi-steady-state conditions for the surface species and methanol adsorption, and surface reactions as the rate-determining steps were applied to predict the catalyst surface coverage and the bulk concentration using a multiscale simulation framework The rate expression based on methanol adsorption as the rate lintiting in LHHW elementary mechanism has been found to be statistically the most reliable representation of the experimental data using hydrotalcite catalyst with different formulations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128617 [article] Kinetic modeling studies of heterogeneously catalyzed biodiesel synthesis reactions [texte imprimé] / Ankur Kapil, Auteur ; Karen Wilson, Auteur ; Adam F Lee, Auteur . - 2011 . - pp. 4818-4830. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 4818-4830 Mots-clés : Modeling  Catalytic  reaction  Kinetic  model Résumé : The heteeogeneously catalyzed transesterification reaction for the production of biodiesel from triglycerides was investigated for reaction mechanism and kinetic constants. Three elementary reaction mechanisms Eley―Rideal (ER), Langmuir― Hinshelwood―Hougen―Watson (LHHW), and Hattori with assumptions, such as quasi-steady-state conditions for the surface species and methanol adsorption, and surface reactions as the rate-determining steps were applied to predict the catalyst surface coverage and the bulk concentration using a multiscale simulation framework The rate expression based on methanol adsorption as the rate lintiting in LHHW elementary mechanism has been found to be statistically the most reliable representation of the experimental data using hydrotalcite catalyst with different formulations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128617