Documents disponibles écrits par cet auteur

Design and control of a methyl methacrylate separation process with a middle decanter / Yi Chang Wu in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4595–4607 Titre : Design and control of a methyl methacrylate separation process with a middle decanter Type de document : texte imprimé Auteurs : Yi Chang Wu, Auteur ; C. S. Hsu, Auteur ; Huang, Hsiao-Ping, Auteur Année de publication : 2011 Article en page(s) : pp. 4595–4607 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Methyl  Methacrylate  Separation  process Résumé : In an industrial process to produce methyl methacrylate, a mixture including methyl methacrylate, methanol, and water needs to be separated. The methyl methacrylate and water are designed to be drawn out of this separation process as two product streams while methanol as an excess reactant should be recycled back to the esterification reactor. An industrial feasible design flowsheet includes three columns, a decanter and two internal recycle streams. In this work, a simple design flowsheet is devised with a distillation column, a bottom decanter, and a stripper. This column/decanter/stripper design can further be simplified into an even simpler design flowsheet with only one distillation column with sidedraw and a middle decanter. Optimal design and dynamic control of this simplified separation process are investigated in this paper. It is shown that the product purity specifications can be maintained despite feed disturbances by holding a tray temperature above the sidedraw location and another one below the sidedraw location. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102570n [article] Design and control of a methyl methacrylate separation process with a middle decanter [texte imprimé] / Yi Chang Wu, Auteur ; C. S. Hsu, Auteur ; Huang, Hsiao-Ping, Auteur . - 2011 . - pp. 4595–4607. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4595–4607 Mots-clés : Methyl  Methacrylate  Separation  process Résumé : In an industrial process to produce methyl methacrylate, a mixture including methyl methacrylate, methanol, and water needs to be separated. The methyl methacrylate and water are designed to be drawn out of this separation process as two product streams while methanol as an excess reactant should be recycled back to the esterification reactor. An industrial feasible design flowsheet includes three columns, a decanter and two internal recycle streams. In this work, a simple design flowsheet is devised with a distillation column, a bottom decanter, and a stripper. This column/decanter/stripper design can further be simplified into an even simpler design flowsheet with only one distillation column with sidedraw and a middle decanter. Optimal design and dynamic control of this simplified separation process are investigated in this paper. It is shown that the product purity specifications can be maintained despite feed disturbances by holding a tray temperature above the sidedraw location and another one below the sidedraw location. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102570n

Design and control of the side reactor configuration for production of ethyl acetate / Reui-Chiang Tsai in Industrial & engineering chemistry research, Vol. 47 N° 23 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9472–9484 Titre : Design and control of the side reactor configuration for production of ethyl acetate Type de document : texte imprimé Auteurs : Reui-Chiang Tsai, Auteur ; Jian Kai Cheng, Auteur ; Huang, Hsiao-Ping, Auteur Année de publication : 2009 Article en page(s) : p. 9472–9484 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : Design  and  control  Side  reactor  configuration  Production  of  ethyl  acetate Résumé : Despite some potential advantages of reactive distillation (RD), reactive distillation may suffer from maintenance/design problems such as catalyst deactivation/replacement and equipment design. In this work, an alternative design, a side reactor configuration, is sought and the process of interest is production of ethyl acetate via esterification. The reactive distillation study by Tang et al. (2005) reveals that almost 90% conversion takes place in the column base of the RD. This naturally suggests a coupled reactor/distillation configuration where all of the catalyst is packed in the bottoms base, denoted as single-reactive tray reactive distillation (RD-SRT). This mitigates the maintenance problem associated with conventional RD. However, simulation results show that, with the same amount of catalyst loading, the SRT configuration cannot achieve the same performance as the RD (∼93% conversion). Another alternative is adding external reactors to the SRT, and this is termed the side reactor configuration (SRC). A systematic design procedure is devised for the SRC design, and the objective function to be minimized is the total annual cost (TAC). The results show that the TAC of the SRC only increases by 5% as compared to that of the RD. A plantwide control structure is developed followed by process identification and controller tuning. The results show that reasonable control performance can be achieved using simple temperature control for the feed flow rate and feed composition disturbances. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071648o [article] Design and control of the side reactor configuration for production of ethyl acetate [texte imprimé] / Reui-Chiang Tsai, Auteur ; Jian Kai Cheng, Auteur ; Huang, Hsiao-Ping, Auteur . - 2009 . - p. 9472–9484. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9472–9484 Mots-clés : Design  and  control  Side  reactor  configuration  Production  of  ethyl  acetate Résumé : Despite some potential advantages of reactive distillation (RD), reactive distillation may suffer from maintenance/design problems such as catalyst deactivation/replacement and equipment design. In this work, an alternative design, a side reactor configuration, is sought and the process of interest is production of ethyl acetate via esterification. The reactive distillation study by Tang et al. (2005) reveals that almost 90% conversion takes place in the column base of the RD. This naturally suggests a coupled reactor/distillation configuration where all of the catalyst is packed in the bottoms base, denoted as single-reactive tray reactive distillation (RD-SRT). This mitigates the maintenance problem associated with conventional RD. However, simulation results show that, with the same amount of catalyst loading, the SRT configuration cannot achieve the same performance as the RD (∼93% conversion). Another alternative is adding external reactors to the SRT, and this is termed the side reactor configuration (SRC). A systematic design procedure is devised for the SRC design, and the objective function to be minimized is the total annual cost (TAC). The results show that the TAC of the SRC only increases by 5% as compared to that of the RD. A plantwide control structure is developed followed by process identification and controller tuning. The results show that reasonable control performance can be achieved using simple temperature control for the feed flow rate and feed composition disturbances. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071648o

Design and control of thermally coupled reactive distillation for the production of isopropyl acetate / Hao-Yeh Lee in Industrial & engineering chemistry research, Vol. 51 N° 36 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11753–11763 Titre : Design and control of thermally coupled reactive distillation for the production of isopropyl acetate Type de document : texte imprimé Auteurs : Hao-Yeh Lee, Auteur ; I-Kuan Lai, Auteur ; Huang, Hsiao-Ping, Auteur Année de publication : 2012 Article en page(s) : pp. 11753–11763 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Isopropyl  Thermally  coupled Résumé : Isopropyl acetates are important organic solvents that are widely used in the production of varnishes, ink, synthetic resins, and adhesive agents. Previous studies developed a process for the production of isopropyl acetate incorporating a reactive distillation (RD) column, a decanter, and a stripper. According to the previous study, the rectifying section of the RD column has a prominent remixing phenomenon. Furthermore, the overhead compositions of RD column and the stripper are all within the liquid–liquid equilibrium envelope. Based on the above observations, a thermally coupled design of this process is established. The key points in the thermally coupled design are: to move the location of the decanter to the stripper side, to totally reflux the organic phase outlet stream, and to sidedraw a liquid stream from the stripper to the RD column. Simulation result shows that 23.14% energy savings can be realized using the proposed thermally coupled design. The control strategy of the proposed design flowsheet is also investigated using tray temperature control loops to indirectly control the product composition. The proposed control strategy is capable of maintaining high-purity product, despite changes in feed composition and throughput. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300647h [article] Design and control of thermally coupled reactive distillation for the production of isopropyl acetate [texte imprimé] / Hao-Yeh Lee, Auteur ; I-Kuan Lai, Auteur ; Huang, Hsiao-Ping, Auteur . - 2012 . - pp. 11753–11763. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11753–11763 Mots-clés : Isopropyl  Thermally  coupled Résumé : Isopropyl acetates are important organic solvents that are widely used in the production of varnishes, ink, synthetic resins, and adhesive agents. Previous studies developed a process for the production of isopropyl acetate incorporating a reactive distillation (RD) column, a decanter, and a stripper. According to the previous study, the rectifying section of the RD column has a prominent remixing phenomenon. Furthermore, the overhead compositions of RD column and the stripper are all within the liquid–liquid equilibrium envelope. Based on the above observations, a thermally coupled design of this process is established. The key points in the thermally coupled design are: to move the location of the decanter to the stripper side, to totally reflux the organic phase outlet stream, and to sidedraw a liquid stream from the stripper to the RD column. Simulation result shows that 23.14% energy savings can be realized using the proposed thermally coupled design. The control strategy of the proposed design flowsheet is also investigated using tray temperature control loops to indirectly control the product composition. The proposed control strategy is capable of maintaining high-purity product, despite changes in feed composition and throughput. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300647h

A hybrid neural network model predictive control with zone penalty weights for type 1 diabetes mellitus / Shih-Wei Liu in Industrial & engineering chemistry research, Vol. 51 N° 26 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 9041-9060 Titre : A hybrid neural network model predictive control with zone penalty weights for type 1 diabetes mellitus Type de document : texte imprimé Auteurs : Shih-Wei Liu, Auteur ; Huang, Hsiao-Ping, Auteur ; Chia-Hung Lin, Auteur Année de publication : 2012 Article en page(s) : pp. 9041-9060 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Predictive  control  Modeling  Neural  network Résumé : In this paper, a hybrid neural network model is developed to predict and control the blood glucose (BG) of the patient who has type 1 diabetes mellitus (T1DM). The proposed model consists of two parts: a linear finite impulse response (FIR) model and a nonlinear autoregessive exogenous input (NARX) network. A recently developed and well-acknowledged meal simulation model of the glucose-insulin system for T1DM is employed to create virtual subjects. Data from virtual subjects are used to identify an intermediate physiological model, and then our proposed hybrid model is trained and validated based on this intermediate model. The key features of the resulting hybrid model are that it reveals satisfactory accuracy of long-term prediction and does not require an immeasurable state for model initialization. The developed hybrid model is then embedded in a nonlinear model predictive control (MPC) controller with zone penalty weights, and this closed-loop controller is implemented on these virtual subjects for simulation-based preclinical testing. The results show that promising glycemic control performance can be achieved. Moreover, this overall BG control methodology is easily portable and has the ability to arbitrarily start the therapeutic control at any initial point. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26107462 [article] A hybrid neural network model predictive control with zone penalty weights for type 1 diabetes mellitus [texte imprimé] / Shih-Wei Liu, Auteur ; Huang, Hsiao-Ping, Auteur ; Chia-Hung Lin, Auteur . - 2012 . - pp. 9041-9060. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 9041-9060 Mots-clés : Predictive  control  Modeling  Neural  network Résumé : In this paper, a hybrid neural network model is developed to predict and control the blood glucose (BG) of the patient who has type 1 diabetes mellitus (T1DM). The proposed model consists of two parts: a linear finite impulse response (FIR) model and a nonlinear autoregessive exogenous input (NARX) network. A recently developed and well-acknowledged meal simulation model of the glucose-insulin system for T1DM is employed to create virtual subjects. Data from virtual subjects are used to identify an intermediate physiological model, and then our proposed hybrid model is trained and validated based on this intermediate model. The key features of the resulting hybrid model are that it reveals satisfactory accuracy of long-term prediction and does not require an immeasurable state for model initialization. The developed hybrid model is then embedded in a nonlinear model predictive control (MPC) controller with zone penalty weights, and this closed-loop controller is implemented on these virtual subjects for simulation-based preclinical testing. The results show that promising glycemic control performance can be achieved. Moreover, this overall BG control methodology is easily portable and has the ability to arbitrarily start the therapeutic control at any initial point. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26107462

Multivariable control with generalized decoupling for disturbance rejection / Feng-Yi Lin in Industrial & engineering chemistry research, Vol. 48 N° 20 (Octobre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9175–9185 Titre : Multivariable control with generalized decoupling for disturbance rejection Type de document : texte imprimé Auteurs : Feng-Yi Lin, Auteur ; Jyh-Cheng Jeng, Auteur ; Huang, Hsiao-Ping, Auteur Année de publication : 2010 Article en page(s) : pp. 9175–9185 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Multivariable  controllers  MIMO  decoupler Résumé : In this paper, a systematic procedure to design multivariable controllers that have options for selective decoupling of different structures (e.g., full or partial decoupler) is proposed. The controller structure is determined based on an analysis of relative load gain (RLG). For controller design, the adjoint of a template matrix is provided to design the MIMO decoupler that is needed for a given process. In the case where decoupling is desirable, according to the number of zero deficiency that the adjoint of the template matrix has, a pole-zero compensator is incorporated to preserve the properness of the decoupling controller and to define the decoupled open-loop dynamics. By incorporating the decoupler, the controller in the main loop is synthesized for disturbance rejection. Stability robustness of the system is tuned using measures of modeling errors in the decoupled open-loop process. Simulation examples are used to illustrate the proposed method and show its effectiveness in disturbance rejection in MIMO systems. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801477z [article] Multivariable control with generalized decoupling for disturbance rejection [texte imprimé] / Feng-Yi Lin, Auteur ; Jyh-Cheng Jeng, Auteur ; Huang, Hsiao-Ping, Auteur . - 2010 . - pp. 9175–9185. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9175–9185 Mots-clés : Multivariable  controllers  MIMO  decoupler Résumé : In this paper, a systematic procedure to design multivariable controllers that have options for selective decoupling of different structures (e.g., full or partial decoupler) is proposed. The controller structure is determined based on an analysis of relative load gain (RLG). For controller design, the adjoint of a template matrix is provided to design the MIMO decoupler that is needed for a given process. In the case where decoupling is desirable, according to the number of zero deficiency that the adjoint of the template matrix has, a pole-zero compensator is incorporated to preserve the properness of the decoupling controller and to define the decoupled open-loop dynamics. By incorporating the decoupler, the controller in the main loop is synthesized for disturbance rejection. Stability robustness of the system is tuned using measures of modeling errors in the decoupled open-loop process. Simulation examples are used to illustrate the proposed method and show its effectiveness in disturbance rejection in MIMO systems. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801477z

Nonparametric identification for control of MIMO hammerstein systems / Jyh-Cheng Jeng in Industrial & engineering chemistry research, Vol. 47 N°17 (Septembre 2008) 

Permalink

Plantwide design of transesterification reactive distillation to co-generate ethyl acetate and n-butanol / Wang, San-Jang in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010) 

Permalink