Documents disponibles écrits par cet auteur

Oxidative Desulfurization of Dibenzothiophene Catalyzed by Ionic Liquid [BMIm] HSO4 / Wei Zhang in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11760–11763 Titre : Oxidative Desulfurization of Dibenzothiophene Catalyzed by Ionic Liquid [BMIm] HSO4 Type de document : texte imprimé Auteurs : Wei Zhang, Auteur ; Ke Xu, Auteur ; Qian Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 11760–11763 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ionic  liquid  Catalyst  Oxidative Résumé : An acidic ionic liquid N-butyl-N-methylimidazolium hydrogen sulfate ([BMIm]HSO4) was applied as extractant and catalyst for the oxidative desulfurization of dibenzothiophenes (DBT) in the presence of H2O2 in model oil. Several parameters, e.g., catalyst amount, hydrogen peroxide quantity, reaction time, and temperature, were investigated in detail. The catalytic oxidative desulfurization rate can reach 100% for DBT in model oil. The ionic liquid [BMIm]HSO4 can be recycled 5 times with only a slight reduction in activity. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100957k [article] Oxidative Desulfurization of Dibenzothiophene Catalyzed by Ionic Liquid [BMIm] HSO4 [texte imprimé] / Wei Zhang, Auteur ; Ke Xu, Auteur ; Qian Zhang, Auteur . - 2011 . - pp. 11760–11763. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11760–11763 Mots-clés : Ionic  liquid  Catalyst  Oxidative Résumé : An acidic ionic liquid N-butyl-N-methylimidazolium hydrogen sulfate ([BMIm]HSO4) was applied as extractant and catalyst for the oxidative desulfurization of dibenzothiophenes (DBT) in the presence of H2O2 in model oil. Several parameters, e.g., catalyst amount, hydrogen peroxide quantity, reaction time, and temperature, were investigated in detail. The catalytic oxidative desulfurization rate can reach 100% for DBT in model oil. The ionic liquid [BMIm]HSO4 can be recycled 5 times with only a slight reduction in activity. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100957k

Temperature-dependent mechanical properties and model of magnetorheological elastomers / Wei Zhang in Industrial & engineering chemistry research, Vol. 50 N° 11 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6704–6712 Titre : Temperature-dependent mechanical properties and model of magnetorheological elastomers Type de document : texte imprimé Auteurs : Wei Zhang, Auteur ; Xinglong Gong, Auteur ; Shouhu Xuan, Auteur Année de publication : 2011 Article en page(s) : pp 6704–6712 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Magnetorheological  elastomers  Mechanical  properties Résumé : Magnetorheological elastomers (MREs) are composed of magnetizable particles (iron particles) and a soft rubberlike matrix. Their mechanical properties, including modulus and damping capability, depend on both an external magnetic field and an environmental temperature. To systematically investigate thetemperature-dependent mechanical properties, six different kinds of MREs samples based on a mixed rubber matrices (cis-polybutadiene rubber and natural rubber) and their mass ratios of BR and NR were 100:0, 80:20, 60:40, 40:60, 20:80, and 0:100, were fabricated in this study. The steady-state and dynamic mechanical properties of the samples were measured under different conditions by using a rheometer. The results revealed that storage modulus (G′) and loss modulus (G′′) of samples, which contained only cis-polybutadiene rubber (BR), decreased linearly with the temperature increment. However, the modulus of sample which contained much natural rubber (NR) showed different characteristic, and the relationships between stress and strain also exhibited different characteristics with different rubber matrix. An improved constitutive equation was developed to model these properties under different magnetic fields and temperatures. The comparison between modeling predicting results with experimental data demonstrated that the model can well-predict the modulus of MRE in different conditions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200386x [article] Temperature-dependent mechanical properties and model of magnetorheological elastomers [texte imprimé] / Wei Zhang, Auteur ; Xinglong Gong, Auteur ; Shouhu Xuan, Auteur . - 2011 . - pp 6704–6712. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6704–6712 Mots-clés : Magnetorheological  elastomers  Mechanical  properties Résumé : Magnetorheological elastomers (MREs) are composed of magnetizable particles (iron particles) and a soft rubberlike matrix. Their mechanical properties, including modulus and damping capability, depend on both an external magnetic field and an environmental temperature. To systematically investigate thetemperature-dependent mechanical properties, six different kinds of MREs samples based on a mixed rubber matrices (cis-polybutadiene rubber and natural rubber) and their mass ratios of BR and NR were 100:0, 80:20, 60:40, 40:60, 20:80, and 0:100, were fabricated in this study. The steady-state and dynamic mechanical properties of the samples were measured under different conditions by using a rheometer. The results revealed that storage modulus (G′) and loss modulus (G′′) of samples, which contained only cis-polybutadiene rubber (BR), decreased linearly with the temperature increment. However, the modulus of sample which contained much natural rubber (NR) showed different characteristic, and the relationships between stress and strain also exhibited different characteristics with different rubber matrix. An improved constitutive equation was developed to model these properties under different magnetic fields and temperatures. The comparison between modeling predicting results with experimental data demonstrated that the model can well-predict the modulus of MRE in different conditions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200386x

Two-degree-of-freedom controller design for an Ill-conditioned process using H2 decoupling control / Wei Zhang in Industrial & engineering chemistry research, Vol. 51 N° 45 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14752-14758 Titre : Two-degree-of-freedom controller design for an Ill-conditioned process using H2 decoupling control Type de document : texte imprimé Auteurs : Wei Zhang, Auteur ; Xing He, Auteur ; Shihe Chen, Auteur Année de publication : 2013 Article en page(s) : pp. 14752-14758 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Design Résumé : In this paper, a two-degree-of-freedom (TDOF) controller is designed for an ill-conditioned process based on the H2 decoupling control method. The ill-conditioned process considered stems from the benchmark problem formulated in the IEEE Conference on Decision and Control (CDC). The goal of this paper is to show that lower order controllers can be reached with respect to the given plant and the corresponding design specifications. The orders of the designed TDOF controllers are 2 and 1, respectively, which is much lower than the previously developed methods. The additional benefit is that the new design procedure is simpler than the developed methods as well. In the proposed design procedure, no weight function needs to be chosen and the controller is given in an analytical form. Simulation shows that the designed controllers satisfy all design specifications of the CDC problem. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620389 [article] Two-degree-of-freedom controller design for an Ill-conditioned process using H2 decoupling control [texte imprimé] / Wei Zhang, Auteur ; Xing He, Auteur ; Shihe Chen, Auteur . - 2013 . - pp. 14752-14758. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14752-14758 Mots-clés : Design Résumé : In this paper, a two-degree-of-freedom (TDOF) controller is designed for an ill-conditioned process based on the H2 decoupling control method. The ill-conditioned process considered stems from the benchmark problem formulated in the IEEE Conference on Decision and Control (CDC). The goal of this paper is to show that lower order controllers can be reached with respect to the given plant and the corresponding design specifications. The orders of the designed TDOF controllers are 2 and 1, respectively, which is much lower than the previously developed methods. The additional benefit is that the new design procedure is simpler than the developed methods as well. In the proposed design procedure, no weight function needs to be chosen and the controller is given in an analytical form. Simulation shows that the designed controllers satisfy all design specifications of the CDC problem. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620389