Documents disponibles écrits par cet auteur

Improving the adsorption of heavy metals from water using commercial carbons modified with egg shell wastes / Alejandro Guijarro-Aldaco in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9354-9362 Titre : Improving the adsorption of heavy metals from water using commercial carbons modified with egg shell wastes Type de document : texte imprimé Auteurs : Alejandro Guijarro-Aldaco, Auteur ; Virginia Hernandez-Montoya, Auteur ; Adrian Bonilla-Petriciolet, Auteur Année de publication : 2011 Article en page(s) : pp. 9354-9362 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Heavy  metal  Adsorption Résumé : We introduce the application of hen egg shell waste to improve the adsorption capacities of heavy-metal ions using commercial carbons via the modification of their surface chemistry. Specifically, a calcium solution extracted from egg shell waste has been used as a low-cost activation agent to improve the adsorption properties of three commercial carbons. An orthogonal array of the Taguchi method has been applied to identify the optimal conditions for the adsorbent modification process using the Zn2+ batch adsorption, at 30 °C and pH 5, as the response variable. Our results show that maximum adsorption capacities of Cd2+, Ni2+, and Zn2+ ions, at 30 °C and pH 5, may increase up to 15 times, with respect to the results obtained using the commercial adsorbent without modification. The improvement of adsorbent performance may be related to the formation of calcium phosphate on the carbon surface. Finally, adsorption studies in binary metal solutions were performed to identify the competitive effects in multicomponent adsorption, using calcium-modified carbons. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395880 [article] Improving the adsorption of heavy metals from water using commercial carbons modified with egg shell wastes [texte imprimé] / Alejandro Guijarro-Aldaco, Auteur ; Virginia Hernandez-Montoya, Auteur ; Adrian Bonilla-Petriciolet, Auteur . - 2011 . - pp. 9354-9362. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9354-9362 Mots-clés : Heavy  metal  Adsorption Résumé : We introduce the application of hen egg shell waste to improve the adsorption capacities of heavy-metal ions using commercial carbons via the modification of their surface chemistry. Specifically, a calcium solution extracted from egg shell waste has been used as a low-cost activation agent to improve the adsorption properties of three commercial carbons. An orthogonal array of the Taguchi method has been applied to identify the optimal conditions for the adsorbent modification process using the Zn2+ batch adsorption, at 30 °C and pH 5, as the response variable. Our results show that maximum adsorption capacities of Cd2+, Ni2+, and Zn2+ ions, at 30 °C and pH 5, may increase up to 15 times, with respect to the results obtained using the commercial adsorbent without modification. The improvement of adsorbent performance may be related to the formation of calcium phosphate on the carbon surface. Finally, adsorption studies in binary metal solutions were performed to identify the competitive effects in multicomponent adsorption, using calcium-modified carbons. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395880

Integrated differential evolution for global optimization and its performance for modeling vapor–liquid equilibrium data / Haibo Zhang in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10047–10061 Titre : Integrated differential evolution for global optimization and its performance for modeling vapor–liquid equilibrium data Type de document : texte imprimé Auteurs : Haibo Zhang, Auteur ; G.P. Rangaiah, Auteur ; Adrian Bonilla-Petriciolet, Auteur Année de publication : 2011 Article en page(s) : pp. 10047–10061 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Optimization  Vapor  liquid Résumé : Parameter estimation in thermodynamic models has been of great interest in chemical engineering because of its complex nature, including nonlinearity, flat objective function in the neighborhood of the global optimum, badly scaled model, and nondifferential term(s) in the equations. In this article, a stochastic global optimization algorithm called integrated differential evolution (IDE) is introduced to solve the parameter estimation problems for modeling vapor–liquid equilibrium (VLE) data. In IDE, the choice of mutation strategy and associated parameters are adapted according to the learning experience from previous generations. The tabu list used in IDE can avoid revisiting the same area and avoid unnecessary function evaluations. A novel and effective stopping criterion based on the number of rejected points during the generation of a trial vector is tested and compared with other criteria. Furthermore, IDE uses a local optimizer after the global search to find the optimum accurately and efficiently. The performance of IDE for benchmark functions and VLE modeling is compared with that of other stochastic algorithms such as DE, DE with tabu list, particle swarm optimization, simulated annealing, and the deterministic algorithm Branch and Reduce Optimization Navigator (BARON). IDE is shown to be better than or comparable to these algorithms for parameter estimation in modeling VLE data. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200819p [article] Integrated differential evolution for global optimization and its performance for modeling vapor–liquid equilibrium data [texte imprimé] / Haibo Zhang, Auteur ; G.P. Rangaiah, Auteur ; Adrian Bonilla-Petriciolet, Auteur . - 2011 . - pp. 10047–10061. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10047–10061 Mots-clés : Optimization  Vapor  liquid Résumé : Parameter estimation in thermodynamic models has been of great interest in chemical engineering because of its complex nature, including nonlinearity, flat objective function in the neighborhood of the global optimum, badly scaled model, and nondifferential term(s) in the equations. In this article, a stochastic global optimization algorithm called integrated differential evolution (IDE) is introduced to solve the parameter estimation problems for modeling vapor–liquid equilibrium (VLE) data. In IDE, the choice of mutation strategy and associated parameters are adapted according to the learning experience from previous generations. The tabu list used in IDE can avoid revisiting the same area and avoid unnecessary function evaluations. A novel and effective stopping criterion based on the number of rejected points during the generation of a trial vector is tested and compared with other criteria. Furthermore, IDE uses a local optimizer after the global search to find the optimum accurately and efficiently. The performance of IDE for benchmark functions and VLE modeling is compared with that of other stochastic algorithms such as DE, DE with tabu list, particle swarm optimization, simulated annealing, and the deterministic algorithm Branch and Reduce Optimization Navigator (BARON). IDE is shown to be better than or comparable to these algorithms for parameter estimation in modeling VLE data. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200819p

Short-cut method for the design of reactive distillation columns / Marcelino Carrera-Rodriguez 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. 10730–10743 Titre : Short-cut method for the design of reactive distillation columns Type de document : texte imprimé Auteurs : Marcelino Carrera-Rodriguez, Auteur ; Juan Gabriel Segovia-Hernandez, Auteur ; Adrian Bonilla-Petriciolet, Auteur Année de publication : 2011 Article en page(s) : pp. 10730–10743 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Distillation  column  Distillation  with  reaction  Design Résumé : The design of reactive distillation (RD) has received significant attention because of the technological and economic advantages obtained from the simultaneous occurrence of reaction and separation. Although the advantages of RD are well-documented in the literature, the commercial applications of RD are still limited because of the control and operation complexity of these separation systems and the need for improved software tools to reliably model and design RD columns. In this study, a robust short-cut method for the design of multicomponent reactive distillation is presented. This method is based on distillation lines and tray-by-tray calculations defined in terms of reaction-invariant composition variables. Our method provides the number of theoretical stages, the operating reflux ratio, the feed tray location, and the top or bottom flow. We use three case studies to demonstrate the effectiveness of the proposed strategy, namely, the reactive systems for the syntheses of ETBE and MTBE in the presence of inert components and of TAME without inert components. The results obtained with our strategy show good agreement with those obtained using the rigorous model of the commercial simulator AspenONE Aspen Plus. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523890 [article] Short-cut method for the design of reactive distillation columns [texte imprimé] / Marcelino Carrera-Rodriguez, Auteur ; Juan Gabriel Segovia-Hernandez, Auteur ; Adrian Bonilla-Petriciolet, Auteur . - 2011 . - pp. 10730–10743. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10730–10743 Mots-clés : Distillation  column  Distillation  with  reaction  Design Résumé : The design of reactive distillation (RD) has received significant attention because of the technological and economic advantages obtained from the simultaneous occurrence of reaction and separation. Although the advantages of RD are well-documented in the literature, the commercial applications of RD are still limited because of the control and operation complexity of these separation systems and the need for improved software tools to reliably model and design RD columns. In this study, a robust short-cut method for the design of multicomponent reactive distillation is presented. This method is based on distillation lines and tray-by-tray calculations defined in terms of reaction-invariant composition variables. Our method provides the number of theoretical stages, the operating reflux ratio, the feed tray location, and the top or bottom flow. We use three case studies to demonstrate the effectiveness of the proposed strategy, namely, the reactive systems for the syntheses of ETBE and MTBE in the presence of inert components and of TAME without inert components. The results obtained with our strategy show good agreement with those obtained using the rigorous model of the commercial simulator AspenONE Aspen Plus. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523890