Documents disponibles écrits par cet auteur

Modeling of heat uptake and release with embedded phase-change materials in monolithic microfluidized bed reactors / Akash Mittal in Industrial & engineering chemistry research, Vol. 49 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1086–1097 Titre : Modeling of heat uptake and release with embedded phase-change materials in monolithic microfluidized bed reactors Type de document : texte imprimé Auteurs : Akash Mittal, Auteur ; Shantanu Roy, Auteur ; Faïçal Larachi, Auteur Année de publication : 2010 Article en page(s) : pp. 1086–1097 Note générale : Industrial Industrial Langues : Anglais (eng) Mots-clés : Heat--Uptake--Modeling--Release--Embedded--Phase-Change--Reactors--Microfluidized--Monolithic--Bed Résumé : An innovative process concept for biomass gasification is proposed, which involves a combination of gasification and combustion reactions in a monolithic structured reactor by using high-temperature phase-change materials to intensify the process heat management. In this paper we specifically look at the heat transport problem, dynamics of which drives the overall dynamics of the proposed process concept. Exploiting the large “separation of scales” between the axial and radial coordinates, we have addressed the modeling problem at the corresponding scales with a simplified, one-dimensional dynamic model in the reactor (axial) scale and a detailed dynamic finite element method (FEM) model at the channel (radial) scale. This contribution relates to the latter model, wherein we have investigated the effect of various controlling physical parameters as well and geometrical and configurational aspects. Finally, we identify ways in which such a process concept may be optimized. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9007425 [article] Modeling of heat uptake and release with embedded phase-change materials in monolithic microfluidized bed reactors [texte imprimé] / Akash Mittal, Auteur ; Shantanu Roy, Auteur ; Faïçal Larachi, Auteur . - 2010 . - pp. 1086–1097. Industrial Industrial Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1086–1097 Mots-clés : Heat--Uptake--Modeling--Release--Embedded--Phase-Change--Reactors--Microfluidized--Monolithic--Bed Résumé : An innovative process concept for biomass gasification is proposed, which involves a combination of gasification and combustion reactions in a monolithic structured reactor by using high-temperature phase-change materials to intensify the process heat management. In this paper we specifically look at the heat transport problem, dynamics of which drives the overall dynamics of the proposed process concept. Exploiting the large “separation of scales” between the axial and radial coordinates, we have addressed the modeling problem at the corresponding scales with a simplified, one-dimensional dynamic model in the reactor (axial) scale and a detailed dynamic finite element method (FEM) model at the channel (radial) scale. This contribution relates to the latter model, wherein we have investigated the effect of various controlling physical parameters as well and geometrical and configurational aspects. Finally, we identify ways in which such a process concept may be optimized. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9007425

Simulating the dynamics of gas−solid flows in a multichannel microcirculating fluidized bed / Yi-Ning Wang in Industrial & engineering chemistry research, Vol. 48 N° 17 (Septembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 17 (Septembre 2009) . - pp. 7928–7937 Titre : Simulating the dynamics of gas−solid flows in a multichannel microcirculating fluidized bed Type de document : texte imprimé Auteurs : Yi-Ning Wang, Auteur ; Faïçal Larachi, Auteur ; Shantanu Roy, Auteur Année de publication : 2009 Article en page(s) : pp. 7928–7937 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Gas−solid  flows  Multichannel  microcirculating  fluidized-bed  reactors  Computational  fluid  dynamics  (CFD)  modeling Résumé : The dynamics of gas−solid flows and distribution in monolithic multichannel microcirculating fluidized-bed reactors was analyzed using a computational fluid dynamics (CFD) modeling approach. A 2D Euler−Euler multiphase model with the kinetic theory of granular flow has been solved for the detailed monolithic packing geometry. The assemblage of monolithic structured packings with through-flow gas-particulate flows is globally considered in the simulation to capture the dominant mechanisms contributing to the final overall aero/granular dynamics. Due to the complex nature of the interactions between gas and particulate phases and the stationary monolith backbone, one of the challenges in the design and operation of the monolith reactors is the prevention of flow maldistribution. The work presented in this paper forms the basis for a comprehensive reactor-scale model for exploring the intriguing possibilities that the proposed process intensification concept offers for chemical reactions of energy/environmental relevance such as biomass gasification and combustion. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8012083 [article] Simulating the dynamics of gas−solid flows in a multichannel microcirculating fluidized bed [texte imprimé] / Yi-Ning Wang, Auteur ; Faïçal Larachi, Auteur ; Shantanu Roy, Auteur . - 2009 . - pp. 7928–7937. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 17 (Septembre 2009) . - pp. 7928–7937 Mots-clés : Gas−solid  flows  Multichannel  microcirculating  fluidized-bed  reactors  Computational  fluid  dynamics  (CFD)  modeling Résumé : The dynamics of gas−solid flows and distribution in monolithic multichannel microcirculating fluidized-bed reactors was analyzed using a computational fluid dynamics (CFD) modeling approach. A 2D Euler−Euler multiphase model with the kinetic theory of granular flow has been solved for the detailed monolithic packing geometry. The assemblage of monolithic structured packings with through-flow gas-particulate flows is globally considered in the simulation to capture the dominant mechanisms contributing to the final overall aero/granular dynamics. Due to the complex nature of the interactions between gas and particulate phases and the stationary monolith backbone, one of the challenges in the design and operation of the monolith reactors is the prevention of flow maldistribution. The work presented in this paper forms the basis for a comprehensive reactor-scale model for exploring the intriguing possibilities that the proposed process intensification concept offers for chemical reactions of energy/environmental relevance such as biomass gasification and combustion. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8012083