Documents disponibles écrits par cet auteur

Dynamics and control of process networks with large energy recycle / Sujit S. Jogwar in Industrial & engineering chemistry research, Vol. 48 N° 13 (Juillet 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 13 (Juillet 2009) . - pp. 6087–6097 Titre : Dynamics and control of process networks with large energy recycle Type de document : texte imprimé Auteurs : Sujit S. Jogwar, Auteur ; Michael Baldea, Auteur ; Prodromos Daoutidis, Auteur Année de publication : 2009 Article en page(s) : pp. 6087–6097 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Energy  integrated  networks  Input/output  energy  flows Résumé : This paper focuses on the dynamics and control aspects of a class of energy integrated networks with large recycle of energy compared to the input/output energy flows. A prototype network is considered to identify the underlying model structure. A time scale separation in the energy dynamics of such networks is documented. Using singular perturbation techniques, a model reduction procedure is outlined, resulting in nonstiff reduced order models for the dynamics in each time scale. The theoretical results are illustrated with the help of examples and a simulation case study on a reactor-feed effluent heat exchanger network. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801050b [article] Dynamics and control of process networks with large energy recycle [texte imprimé] / Sujit S. Jogwar, Auteur ; Michael Baldea, Auteur ; Prodromos Daoutidis, Auteur . - 2009 . - pp. 6087–6097. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 13 (Juillet 2009) . - pp. 6087–6097 Mots-clés : Energy  integrated  networks  Input/output  energy  flows Résumé : This paper focuses on the dynamics and control aspects of a class of energy integrated networks with large recycle of energy compared to the input/output energy flows. A prototype network is considered to identify the underlying model structure. A time scale separation in the energy dynamics of such networks is documented. Using singular perturbation techniques, a model reduction procedure is outlined, resulting in nonstiff reduced order models for the dynamics in each time scale. The theoretical results are illustrated with the help of examples and a simulation case study on a reactor-feed effluent heat exchanger network. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801050b

Energy flow patterns and control implications for integrated distillation networks / Sujit S. Jogwar in Industrial & engineering chemistry research, Vol. 49 N° 17 (Septembre 1, 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 17 (Septembre 1, 2010) . - pp 8048–8061 Titre : Energy flow patterns and control implications for integrated distillation networks Type de document : texte imprimé Auteurs : Sujit S. Jogwar, Auteur ; Prodromos Daoutidis, Auteur Année de publication : 2010 Article en page(s) : pp 8048–8061 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Energy  Integrated  distillation  networks. Résumé : This paper focuses on the dynamics and control of energy-integrated distillation networks. Typical examples of networks of distillation columns, with significant energy integration, are analyzed with the help of energy flow diagrams. Common patterns (e.g., recycle loops, throughput paths) are identified, which influence the dynamic characteristics of these networks. An example of double effect distillation is considered for detailed dynamic analysis and control. A simulation case study is presented to illustrate the application of the proposed framework. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101006v [article] Energy flow patterns and control implications for integrated distillation networks [texte imprimé] / Sujit S. Jogwar, Auteur ; Prodromos Daoutidis, Auteur . - 2010 . - pp 8048–8061. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 17 (Septembre 1, 2010) . - pp 8048–8061 Mots-clés : Energy  Integrated  distillation  networks. Résumé : This paper focuses on the dynamics and control of energy-integrated distillation networks. Typical examples of networks of distillation columns, with significant energy integration, are analyzed with the help of energy flow diagrams. Common patterns (e.g., recycle loops, throughput paths) are identified, which influence the dynamic characteristics of these networks. An example of double effect distillation is considered for detailed dynamic analysis and control. A simulation case study is presented to illustrate the application of the proposed framework. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101006v

Modeling and optimization of membrane reactors for carbon capture in integrated gasification combined cycle units / Fernando V. Lima in Industrial & engineering chemistry research, Vol. 51 N° 15 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 15 (Avril 2012) . - pp. 5480-5489 Titre : Modeling and optimization of membrane reactors for carbon capture in integrated gasification combined cycle units Type de document : texte imprimé Auteurs : Fernando V. Lima, Auteur ; Prodromos Daoutidis, Auteur ; Michael Tsapatsis, Auteur Année de publication : 2012 Article en page(s) : pp. 5480-5489 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Gasification  Membrane  reactor  Optimization  Modeling Résumé : This paper investigates the alternative of precombustion capture of carbon dioxide from integrated gasification combined cycle (IGCC) plants using membrane reactors equipped with H2-selective zeolite membranes for the water gas shift reaction. Specifically, a one-dimensional and isothermal membrane reactor model is developed. This model is used for simulation and optimization studies considering cocurrent and countercurrent modes of reactor operation. The simulation results indicate successful countercurrent cases that satisfy all of the specified targets and constraints. With use of this developed model, a novel optimization problem is formulated and solved to guide the selection of the optimal reactor design among typical scenarios of operation. The optimization results suggest as optimal solution a reactor design with a preshift followed by a membrane reactor. The obtained optimal design enables a more efficient membrane use by placing it in the optimal location. This design also results in savings of as high as 25% (in the range of 10-25%) in terms of membrane material when compared to the original membrane reactor design. For the price range of zeolite membranes considered on the order of $1000-10 000/m2 and for large-scale applications, in which the membrane surface areas are on the order of 2000 m2, 25% of savings implies cost reductions on the order of millions of dollars (as high as $5 000 000 in this case). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25815826 [article] Modeling and optimization of membrane reactors for carbon capture in integrated gasification combined cycle units [texte imprimé] / Fernando V. Lima, Auteur ; Prodromos Daoutidis, Auteur ; Michael Tsapatsis, Auteur . - 2012 . - pp. 5480-5489. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 15 (Avril 2012) . - pp. 5480-5489 Mots-clés : Gasification  Membrane  reactor  Optimization  Modeling Résumé : This paper investigates the alternative of precombustion capture of carbon dioxide from integrated gasification combined cycle (IGCC) plants using membrane reactors equipped with H2-selective zeolite membranes for the water gas shift reaction. Specifically, a one-dimensional and isothermal membrane reactor model is developed. This model is used for simulation and optimization studies considering cocurrent and countercurrent modes of reactor operation. The simulation results indicate successful countercurrent cases that satisfy all of the specified targets and constraints. With use of this developed model, a novel optimization problem is formulated and solved to guide the selection of the optimal reactor design among typical scenarios of operation. The optimization results suggest as optimal solution a reactor design with a preshift followed by a membrane reactor. The obtained optimal design enables a more efficient membrane use by placing it in the optimal location. This design also results in savings of as high as 25% (in the range of 10-25%) in terms of membrane material when compared to the original membrane reactor design. For the price range of zeolite membranes considered on the order of $1000-10 000/m2 and for large-scale applications, in which the membrane surface areas are on the order of 2000 m2, 25% of savings implies cost reductions on the order of millions of dollars (as high as $5 000 000 in this case). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25815826

Rule-Based Generation of Thermochemical Routes to Biomass Conversion / Srinivas Rangarajan in Industrial & engineering chemistry research, Vol. 49 N° 21 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10459–10470 Titre : Rule-Based Generation of Thermochemical Routes to Biomass Conversion Type de document : texte imprimé Auteurs : Srinivas Rangarajan, Auteur ; Aditya Bhan, Auteur ; Prodromos Daoutidis, Auteur Année de publication : 2011 Article en page(s) : pp. 10459–10470 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Thermochemical  Biomass Résumé : Biomass conversion to fuels and chemicals involves a multitude of oxygen-containing compounds and thermochemical reaction routes. A detailed elucidation of the process chemistry is, thus, a key step in understanding the reaction mechanisms and designing chemical processes in a biorefinery. In this paper, a computational tool, called Rule Input Network Generator (RING), is presented as a platform for modeling diverse homogeneous and heterogeneous chemistries in biomass conversion and automatically generating the underlying complex reaction networks. RING accepts a set of reaction rules and initial reactants as inputs and exhaustively generates the reactions of the system. The reaction center of an elementary step is represented by a SMARTS-like string and identified as a submolecular pattern in a reactant molecular graph using a pattern-matching algorithm. The reaction events are subsequently modeled as a graph transformation system. The generality of this framework was substantiated by the successful application of RING in reproducing the reaction mechanisms of different biomass conversion systems, such as acid-catalyzed dehydration of fructose, base-catalyzed esterification of triglycerides, and gas phase pyrolysis of fatty esters. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100546t [article] Rule-Based Generation of Thermochemical Routes to Biomass Conversion [texte imprimé] / Srinivas Rangarajan, Auteur ; Aditya Bhan, Auteur ; Prodromos Daoutidis, Auteur . - 2011 . - pp. 10459–10470. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10459–10470 Mots-clés : Thermochemical  Biomass Résumé : Biomass conversion to fuels and chemicals involves a multitude of oxygen-containing compounds and thermochemical reaction routes. A detailed elucidation of the process chemistry is, thus, a key step in understanding the reaction mechanisms and designing chemical processes in a biorefinery. In this paper, a computational tool, called Rule Input Network Generator (RING), is presented as a platform for modeling diverse homogeneous and heterogeneous chemistries in biomass conversion and automatically generating the underlying complex reaction networks. RING accepts a set of reaction rules and initial reactants as inputs and exhaustively generates the reactions of the system. The reaction center of an elementary step is represented by a SMARTS-like string and identified as a submolecular pattern in a reactant molecular graph using a pattern-matching algorithm. The reaction events are subsequently modeled as a graph transformation system. The generality of this framework was substantiated by the successful application of RING in reproducing the reaction mechanisms of different biomass conversion systems, such as acid-catalyzed dehydration of fructose, base-catalyzed esterification of triglycerides, and gas phase pyrolysis of fatty esters. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100546t