Documents disponibles écrits par cet auteur

Conceptual synthesis of gasification-based biorefineries using thermodynamic equilibrium optimization models / Douglas H. S. Tay in Industrial & engineering chemistry research, Vol. 50 N° 18 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10681–10695 Titre : Conceptual synthesis of gasification-based biorefineries using thermodynamic equilibrium optimization models Type de document : texte imprimé Auteurs : Douglas H. S. Tay, Auteur ; Houssein Kheireddine, Auteur ; Denny K. S. Ng, Auteur Année de publication : 2011 Article en page(s) : pp. 10681–10695 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Modeling  Optimization  Thermodynamic  equilibrium  Gasification Résumé : An integrated biorefinery is a processing facility that converts biomass into a wide range of biochemical products and also provides a sustainable supply of biofuels and energy. One of its critical features is the ability to handle a wide variety of biomass feedstocks and the capacity to produce a portfolio of products through multiple conversion technologies. The gasification process is recognized as a promising option for initial processing of biomass, as it is a robust thermal conversion process. The composition of syngas, especially the ratio ofH2to CO, is crucial when the syngas is further converted to liquid fuels and chemicals. To optimize the production of syngas for application in an integrated biorefinery, a systematic approach is needed to design the system and predict its performance. In this work, a modular optimization approach to link a stoichiometric equilibrium model of biomass gasification and structural models of synthesis processes is developed. In this approach, all model components are solved simultaneously. The approach is used to evaluate the equilibrium composition of syngas, the optimum operating temperature, and the required types and amounts of oxidants. Two case studies are used to illustrate the approach. A sensitivity analysis is then performed to assess the most significant factors affecting the process economics in these examples. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523886 [article] Conceptual synthesis of gasification-based biorefineries using thermodynamic equilibrium optimization models [texte imprimé] / Douglas H. S. Tay, Auteur ; Houssein Kheireddine, Auteur ; Denny K. S. Ng, Auteur . - 2011 . - pp. 10681–10695. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10681–10695 Mots-clés : Modeling  Optimization  Thermodynamic  equilibrium  Gasification Résumé : An integrated biorefinery is a processing facility that converts biomass into a wide range of biochemical products and also provides a sustainable supply of biofuels and energy. One of its critical features is the ability to handle a wide variety of biomass feedstocks and the capacity to produce a portfolio of products through multiple conversion technologies. The gasification process is recognized as a promising option for initial processing of biomass, as it is a robust thermal conversion process. The composition of syngas, especially the ratio ofH2to CO, is crucial when the syngas is further converted to liquid fuels and chemicals. To optimize the production of syngas for application in an integrated biorefinery, a systematic approach is needed to design the system and predict its performance. In this work, a modular optimization approach to link a stoichiometric equilibrium model of biomass gasification and structural models of synthesis processes is developed. In this approach, all model components are solved simultaneously. The approach is used to evaluate the equilibrium composition of syngas, the optimum operating temperature, and the required types and amounts of oxidants. Two case studies are used to illustrate the approach. A sensitivity analysis is then performed to assess the most significant factors affecting the process economics in these examples. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523886

Flowrate targeting algorithm for interplant resource conservation network. Part 1 / Irene M. L. Chew in Industrial & engineering chemistry research, Vol. 49 N° 14 (Juillet 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp 6439–6455 Titre : Flowrate targeting algorithm for interplant resource conservation network. Part 1 : unassisted integration scheme Type de document : texte imprimé Auteurs : Irene M. L. Chew, Auteur ; Dominic C. Y. Foo, Auteur ; Denny K. S. Ng, Auteur Année de publication : 2010 Article en page(s) : pp 6439–6455 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Algorithm  Resource  conservation  network Résumé : This paper is part 1 of a series describing a new algorithm for targeting minimum fresh resource and waste flow rates for an interplant resource conservation network (IPRCN). The IPRCN enables the reuse of the excess process sources among different networks, which reduces the consumption of fresh resource and generation of waste simultaneously. Four hypothetical examples are presented to illustrate both concentration- and property-based utility gas and water integration problems. In addition, the proposed targeting algorithm is adapted in the synthesis of total resource network, where the minimum regeneration and waste treatment flow rates can be targeted prior to the detailed design of an IPRCN. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901802m [article] Flowrate targeting algorithm for interplant resource conservation network. Part 1 : unassisted integration scheme [texte imprimé] / Irene M. L. Chew, Auteur ; Dominic C. Y. Foo, Auteur ; Denny K. S. Ng, Auteur . - 2010 . - pp 6439–6455. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp 6439–6455 Mots-clés : Algorithm  Resource  conservation  network Résumé : This paper is part 1 of a series describing a new algorithm for targeting minimum fresh resource and waste flow rates for an interplant resource conservation network (IPRCN). The IPRCN enables the reuse of the excess process sources among different networks, which reduces the consumption of fresh resource and generation of waste simultaneously. Four hypothetical examples are presented to illustrate both concentration- and property-based utility gas and water integration problems. In addition, the proposed targeting algorithm is adapted in the synthesis of total resource network, where the minimum regeneration and waste treatment flow rates can be targeted prior to the detailed design of an IPRCN. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901802m