Documents disponibles écrits par cet auteur

Circumventing the black-hole problem in design and control of dividing-wall distillation columns / Yufeng Wang 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. 14771-14792 Titre : Circumventing the black-hole problem in design and control of dividing-wall distillation columns Type de document : texte imprimé Auteurs : Yufeng Wang, Auteur ; Kejin Huang, Auteur ; Shujun Luan, Auteur Année de publication : 2013 Article en page(s) : pp. 14771-14792 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Distillation  column  Design Résumé : Owing to the great degree of mass integration and energy integration between the prefractionator and the main distillation column, it is usually infeasible to achieve a four-point composition control policy (i.e., the control of the main compositions of the three products and the ratio of the two impurities in the intermediate product) in a dividing-wall distillation column (DWDC), and this restricts, to a certain extent, process applicability and flexibility. The issue is referred to as the black-hole problem in the current work and has received very little attention so far. In this paper, an attempt is made to tackle this intricate problem, and the number of stages in each section of the DWDC is used as adjustment variables to coordinate the relationship between the prefractionator and the main distillation column involved. A simple and yet effective procedure is devised to guide the structural modifications of a given DWDC and the separation of two ternary mixtures of hypothetical components, A, B, and C, and benzene, toluene, and o-xylene are chosen as illustrative examples to evaluate its feasibility and effectiveness. Through steady-state analysis and closed-loop operation studies, it is demonstrated that the black-hole problem can be completely circumvented with the careful adjustment of the number of stages in each section of the DWDC. This outcome gives evidence to the feasibility and effectiveness of the proposed philosophy and indicates a reasonable way to enhance the applicability and flexibilities of the DWDC. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620391 [article] Circumventing the black-hole problem in design and control of dividing-wall distillation columns [texte imprimé] / Yufeng Wang, Auteur ; Kejin Huang, Auteur ; Shujun Luan, Auteur . - 2013 . - pp. 14771-14792. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14771-14792 Mots-clés : Distillation  column  Design Résumé : Owing to the great degree of mass integration and energy integration between the prefractionator and the main distillation column, it is usually infeasible to achieve a four-point composition control policy (i.e., the control of the main compositions of the three products and the ratio of the two impurities in the intermediate product) in a dividing-wall distillation column (DWDC), and this restricts, to a certain extent, process applicability and flexibility. The issue is referred to as the black-hole problem in the current work and has received very little attention so far. In this paper, an attempt is made to tackle this intricate problem, and the number of stages in each section of the DWDC is used as adjustment variables to coordinate the relationship between the prefractionator and the main distillation column involved. A simple and yet effective procedure is devised to guide the structural modifications of a given DWDC and the separation of two ternary mixtures of hypothetical components, A, B, and C, and benzene, toluene, and o-xylene are chosen as illustrative examples to evaluate its feasibility and effectiveness. Through steady-state analysis and closed-loop operation studies, it is demonstrated that the black-hole problem can be completely circumvented with the careful adjustment of the number of stages in each section of the DWDC. This outcome gives evidence to the feasibility and effectiveness of the proposed philosophy and indicates a reasonable way to enhance the applicability and flexibilities of the DWDC. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620391

Deepening internal mass integration in design of reactive distillation columns, 1: principle and procedure / Jie Sun in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2034–2048 Titre : Deepening internal mass integration in design of reactive distillation columns, 1: principle and procedure Type de document : texte imprimé Auteurs : Jie Sun, Auteur ; Kejin Huang, Auteur ; Shaofeng Wang, Auteur Année de publication : 2009 Article en page(s) : p. 2034–2048 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Reactive  distillation  column  Internal  mass  integration  Catalyst Résumé : For a reactive distillation column involving reactions with negligible or no thermal effect, the thermodynamic efficiency can be improved substantially through deepening internal mass integration between the reaction operation and the separation operation involved. Four strategies, including the superimposition of reactive section onto rectifying and stripping sections, relocation of feed stages, and redistribution of catalyst within the reactive section, can be used to intensify the internal mass integration. With a systematic application of these strategies, a sequential procedure is devised for the synthesis and design of reactive distillation columns involving reactions with negligible or no thermal effect. Four hypothetical ideal reactive distillation systems are used as examples to evaluate the philosophy proposed, and a substantial reduction of utility consumption is secured in addition to a further abatement in fixed investment. These striking results are evidence of the strong necessity and efficacy of deepening internal mass integration in the synthesis and design of reactive distillation columns involving reactions with negligible or no thermal effect. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801144n [article] Deepening internal mass integration in design of reactive distillation columns, 1: principle and procedure [texte imprimé] / Jie Sun, Auteur ; Kejin Huang, Auteur ; Shaofeng Wang, Auteur . - 2009 . - p. 2034–2048. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2034–2048 Mots-clés : Reactive  distillation  column  Internal  mass  integration  Catalyst Résumé : For a reactive distillation column involving reactions with negligible or no thermal effect, the thermodynamic efficiency can be improved substantially through deepening internal mass integration between the reaction operation and the separation operation involved. Four strategies, including the superimposition of reactive section onto rectifying and stripping sections, relocation of feed stages, and redistribution of catalyst within the reactive section, can be used to intensify the internal mass integration. With a systematic application of these strategies, a sequential procedure is devised for the synthesis and design of reactive distillation columns involving reactions with negligible or no thermal effect. Four hypothetical ideal reactive distillation systems are used as examples to evaluate the philosophy proposed, and a substantial reduction of utility consumption is secured in addition to a further abatement in fixed investment. These striking results are evidence of the strong necessity and efficacy of deepening internal mass integration in the synthesis and design of reactive distillation columns involving reactions with negligible or no thermal effect. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801144n

Design and analysis of internally heat - integrated reactive distillation processes / Yang Jiao in Industrial & engineering chemistry research, Vol. 51 N° 10 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp.4002-4016 Titre : Design and analysis of internally heat - integrated reactive distillation processes Type de document : texte imprimé Auteurs : Yang Jiao, Auteur ; San-Jang Wang, Auteur ; Kejin Huang, Auteur Année de publication : 2012 Article en page(s) : pp.4002-4016 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Heat  integrated  distillation Résumé : Process intensification is aimed at integrating different processes in design to reduce utility consumption and capital investment, as well as at achieving environmental and safety benefits. Internally heat-integrated distillation and reactive distillation are representative examples of such design technology. In this study, the performance of internally heat-integrated reactive distillation, a novel technology combining both internally heat-integrated distillation and reactive distillation, is investigated for three ideal reactive distillation processes with a reaction zone located at top, middle, and bottom, respectively, of a reactive distillation column. The influences of reaction thermal effect (i.e., exothermic or endothermic reaction), relative volatilities between components, and chemical equilibrium constants on total annualized cost (TAC) are examined. Simulation results demonstrate that the internally heat-integrated reactive distillation can provide better economic benefit than conventional reactive distillation if the reaction zone can be properly placed in the high-pressure section or in both high- and low-pressure sections. The most TAC reduction from the implementation of internal heat integration can be obtained for the reactive distillation column with the reaction zone located at column top. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202182h [article] Design and analysis of internally heat - integrated reactive distillation processes [texte imprimé] / Yang Jiao, Auteur ; San-Jang Wang, Auteur ; Kejin Huang, Auteur . - 2012 . - pp.4002-4016. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp.4002-4016 Mots-clés : Heat  integrated  distillation Résumé : Process intensification is aimed at integrating different processes in design to reduce utility consumption and capital investment, as well as at achieving environmental and safety benefits. Internally heat-integrated distillation and reactive distillation are representative examples of such design technology. In this study, the performance of internally heat-integrated reactive distillation, a novel technology combining both internally heat-integrated distillation and reactive distillation, is investigated for three ideal reactive distillation processes with a reaction zone located at top, middle, and bottom, respectively, of a reactive distillation column. The influences of reaction thermal effect (i.e., exothermic or endothermic reaction), relative volatilities between components, and chemical equilibrium constants on total annualized cost (TAC) are examined. Simulation results demonstrate that the internally heat-integrated reactive distillation can provide better economic benefit than conventional reactive distillation if the reaction zone can be properly placed in the high-pressure section or in both high- and low-pressure sections. The most TAC reduction from the implementation of internal heat integration can be obtained for the reactive distillation column with the reaction zone located at column top. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202182h

Externally heat-integrated double distillation column (EHIDDiC) / Kejin Huang 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. 1333–1350 Titre : Externally heat-integrated double distillation column (EHIDDiC) : basic concept and general characteristics Type de document : texte imprimé Auteurs : Kejin Huang, Auteur ; Wei Liu, Auteur ; Jiangpeng Ma, Auteur Année de publication : 2010 Article en page(s) : pp. 1333–1350 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Externally--Heat-Integrated--Double  Distillation--Column  (EHIDDi--Basic  Concept--General  Characteristics Résumé : In terms of the thermodynamic characteristics of simple distillation columns, a novel schematic of an externally heat-integrated double distillation column (EHIDDiC) is proposed and studied in this work. It consists of high-pressure and low-pressure distillation columns, with external heat integration between the whole rectifying section of the former and the whole stripping section of the latter. In comparison with conventional distillation systems (i.e., direct and indirect separation sequences), the EHIDDiC was found to require relatively small capital investment and low operating costs. It can even outperform conventional distillation systems with the condenser/reboiler type of heat integration under some favorable operating conditions. In terms of the separation of a ternary ideal mixture containing hypothetical components A, B, and C, the EHIDDiC was evaluated through intensive comparisons with its conventional counterparts. Sensitivity analysis was also conducted with respect to some relevant physical properties and design parameters, including the relative volatilities, feed composition, external heat-transfer area per stage, product specifications, and utility costs. It was confirmed that the EHIDDiC can be advantageous over conventional distillation systems with and without condenser/reboiler-type heat integration, and the results obtained reflect the salient characteristics of the EHIDDiC. ISSN : 0888-5885 [article] Externally heat-integrated double distillation column (EHIDDiC) : basic concept and general characteristics [texte imprimé] / Kejin Huang, Auteur ; Wei Liu, Auteur ; Jiangpeng Ma, Auteur . - 2010 . - pp. 1333–1350. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1333–1350 Mots-clés : Externally--Heat-Integrated--Double  Distillation--Column  (EHIDDi--Basic  Concept--General  Characteristics Résumé : In terms of the thermodynamic characteristics of simple distillation columns, a novel schematic of an externally heat-integrated double distillation column (EHIDDiC) is proposed and studied in this work. It consists of high-pressure and low-pressure distillation columns, with external heat integration between the whole rectifying section of the former and the whole stripping section of the latter. In comparison with conventional distillation systems (i.e., direct and indirect separation sequences), the EHIDDiC was found to require relatively small capital investment and low operating costs. It can even outperform conventional distillation systems with the condenser/reboiler type of heat integration under some favorable operating conditions. In terms of the separation of a ternary ideal mixture containing hypothetical components A, B, and C, the EHIDDiC was evaluated through intensive comparisons with its conventional counterparts. Sensitivity analysis was also conducted with respect to some relevant physical properties and design parameters, including the relative volatilities, feed composition, external heat-transfer area per stage, product specifications, and utility costs. It was confirmed that the EHIDDiC can be advantageous over conventional distillation systems with and without condenser/reboiler-type heat integration, and the results obtained reflect the salient characteristics of the EHIDDiC. ISSN : 0888-5885

Influences of pressure on the operation of reactive distillation columns involving kinetically controlled exothermic reactions / Chao Wang in Industrial & engineering chemistry research, Vol. 51 N° 9 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3692-3708 Titre : Influences of pressure on the operation of reactive distillation columns involving kinetically controlled exothermic reactions Type de document : texte imprimé Auteurs : Chao Wang, Auteur ; Liang Zhang, Auteur ; Kejin Huang, Auteur Année de publication : 2012 Article en page(s) : pp. 3692-3708 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Exothermic  reaction  Distillation  column  Distillation  with  reaction Résumé : For the reactive distillation column involving a kinetically controlled exothermic reaction, operating pressure can present nonmonotonic influences on process dynamics and operation. While the enhancement of operating pressure benefits process dynamics and controllability in the lower part of its feasible region (which is confined by the temperature levels of the available cold and hot utilities), it turns to deteriorate process dynamics and controllability in the higher part of its feasible region. Three reactive distillation systems, including an ideal reactive distillation column performing a hypothetical exothermic reaction, A + Bkf⇄ kb C + D, and two real ones producing, respectively, methyl acetate from acetic acid and methanol and methyl tertiary butyl ether (MTBE) from isobutylene and methanol, are thoroughly studied in this work, and the results confirm the existence of this unique phenomenon. The intricate behavior of such kind of reactive distillation columns is essentially governed by the conflicting effects of operating pressure on reaction rate and chemical equilibrium constant and determines actually a favorable region of operating pressure for process dynamics and operation. Because the region may or may not coincide with the one in terms of process synthesis and design, operating pressure can therefore serve as an important decision variable to trade-off process design and operation, rendering the resultant process design with balanced steady-state performance and process dynamics and controllability. ISSN : 0888 -5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595798 [article] Influences of pressure on the operation of reactive distillation columns involving kinetically controlled exothermic reactions [texte imprimé] / Chao Wang, Auteur ; Liang Zhang, Auteur ; Kejin Huang, Auteur . - 2012 . - pp. 3692-3708. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3692-3708 Mots-clés : Exothermic  reaction  Distillation  column  Distillation  with  reaction Résumé : For the reactive distillation column involving a kinetically controlled exothermic reaction, operating pressure can present nonmonotonic influences on process dynamics and operation. While the enhancement of operating pressure benefits process dynamics and controllability in the lower part of its feasible region (which is confined by the temperature levels of the available cold and hot utilities), it turns to deteriorate process dynamics and controllability in the higher part of its feasible region. Three reactive distillation systems, including an ideal reactive distillation column performing a hypothetical exothermic reaction, A + Bkf⇄ kb C + D, and two real ones producing, respectively, methyl acetate from acetic acid and methanol and methyl tertiary butyl ether (MTBE) from isobutylene and methanol, are thoroughly studied in this work, and the results confirm the existence of this unique phenomenon. The intricate behavior of such kind of reactive distillation columns is essentially governed by the conflicting effects of operating pressure on reaction rate and chemical equilibrium constant and determines actually a favorable region of operating pressure for process dynamics and operation. Because the region may or may not coincide with the one in terms of process synthesis and design, operating pressure can therefore serve as an important decision variable to trade-off process design and operation, rendering the resultant process design with balanced steady-state performance and process dynamics and controllability. ISSN : 0888 -5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595798

Reactive distillation columns with a top-bottom external recycle / Haisheng Chen in Industrial & engineering chemistry research, Vol. 51 N° 44 (Novembre 2012) 

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A simplified scheme of externally heat-integrated double distillation columns (EHIDDiC) with three external heat exchangers / Yun Wang in Industrial & engineering chemistry research, Vol. 49 N° 7 (Avril 2010) 

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Understanding the impact of operating pressure on process intensification in reactive distillation columns / Shaofeng Wang in Industrial & engineering chemistry research, Vol. 49 N° 9 (Mai 2010) 

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