Documents disponibles écrits par cet auteur

Design and control of a heat - integrated reactive distillation system for the hydrolysis of methyl acetate / Hao-Yeh Lee in Industrial & engineering chemistry research, Vol. 49 N° 16 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7398–7411 Titre : Design and control of a heat - integrated reactive distillation system for the hydrolysis of methyl acetate Type de document : texte imprimé Auteurs : Hao-Yeh Lee, Auteur ; Yi-Chen Lee, Auteur ; Chien, I-Lung, Auteur Année de publication : 2010 Article en page(s) : pp. 7398–7411 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydrolysis  Reactive  Distillation  System Résumé : There is increasing interest in the heat-integrated reactive distillation systems, lately. In this Article, two types of heat-integrated reactive distillation systems for the hydrolysis of methyl acetate are investigated. One type is to use the concept of internally heat-integrated distillation column (HIDiC) as applied to the reactive distillation system. Another type for the heat integration is to use a multieffect distillation concept by splitting the feed to enter into two smaller reactive distillation columns operated at different pressures. Rigorous simulation study has been conducted to compare the optimal flowsheet of the above two designs. It is found that, although the first design can save operating costs by 8.05%, due to the high cost of the compressor needed in the system, the total annual cost is 33.13% higher than that of the base design without heat integration. On the contrary, the multieffect distillation design not only saves operating cost by 15.19%, but also saves the total annual cost by 6.42%. The overall control strategy of this proposed heat-integrated design has also been developed. Only tray temperature control loops are needed to properly reject feed disturbances. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9016754 [article] Design and control of a heat - integrated reactive distillation system for the hydrolysis of methyl acetate [texte imprimé] / Hao-Yeh Lee, Auteur ; Yi-Chen Lee, Auteur ; Chien, I-Lung, Auteur . - 2010 . - pp. 7398–7411. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7398–7411 Mots-clés : Hydrolysis  Reactive  Distillation  System Résumé : There is increasing interest in the heat-integrated reactive distillation systems, lately. In this Article, two types of heat-integrated reactive distillation systems for the hydrolysis of methyl acetate are investigated. One type is to use the concept of internally heat-integrated distillation column (HIDiC) as applied to the reactive distillation system. Another type for the heat integration is to use a multieffect distillation concept by splitting the feed to enter into two smaller reactive distillation columns operated at different pressures. Rigorous simulation study has been conducted to compare the optimal flowsheet of the above two designs. It is found that, although the first design can save operating costs by 8.05%, due to the high cost of the compressor needed in the system, the total annual cost is 33.13% higher than that of the base design without heat integration. On the contrary, the multieffect distillation design not only saves operating cost by 15.19%, but also saves the total annual cost by 6.42%. The overall control strategy of this proposed heat-integrated design has also been developed. Only tray temperature control loops are needed to properly reject feed disturbances. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9016754

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

Plantwide design of ideal reactive distillation processes with thermal coupling / Wang, San-Jang in Industrial & engineering chemistry research, Vol. 49 N° 7 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3262–3274 Titre : Plantwide design of ideal reactive distillation processes with thermal coupling Type de document : texte imprimé Auteurs : Wang, San-Jang, Auteur ; Hao-Yeh Lee, Auteur ; Jui-Hung Ho, Auteur Année de publication : 2010 Article en page(s) : pp. 3262–3274 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Plantwide  Design  Distillation  Thermal  Coupling Résumé : Process intensification is aimed to integrate different processes in design to reduce energy consumption and capital investment, as well as to achieve environmental and safety benefits. Reactive distillation and thermally coupled distillation are examples of such process intensification. In this study, the performance of thermally coupled reactive distillation, a technology combining reactive distillation and thermally coupled distillation, is investigated for ideal quaternary reaction systems with different rankings of relative volatility. Possible configurations of thermally coupled reactive distillation are designed for systems of types IR, IIR, and IIIR with the excess design and type IIP with the stoichiometric design. Reactive distillation with thermal coupling is demonstrated to provide better energy efficiency than conventional reactive distillation. The remixing phenomenon associated with thermodynamic inefficiency in conventional distillation sequences can be reduced or eliminated by implementing thermal coupling between columns. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900786u [article] Plantwide design of ideal reactive distillation processes with thermal coupling [texte imprimé] / Wang, San-Jang, Auteur ; Hao-Yeh Lee, Auteur ; Jui-Hung Ho, Auteur . - 2010 . - pp. 3262–3274. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3262–3274 Mots-clés : Plantwide  Design  Distillation  Thermal  Coupling Résumé : Process intensification is aimed to integrate different processes in design to reduce energy consumption and capital investment, as well as to achieve environmental and safety benefits. Reactive distillation and thermally coupled distillation are examples of such process intensification. In this study, the performance of thermally coupled reactive distillation, a technology combining reactive distillation and thermally coupled distillation, is investigated for ideal quaternary reaction systems with different rankings of relative volatility. Possible configurations of thermally coupled reactive distillation are designed for systems of types IR, IIR, and IIIR with the excess design and type IIP with the stoichiometric design. Reactive distillation with thermal coupling is demonstrated to provide better energy efficiency than conventional reactive distillation. The remixing phenomenon associated with thermodynamic inefficiency in conventional distillation sequences can be reduced or eliminated by implementing thermal coupling between columns. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900786u

Reactive distillation for esterification of an alcohol mixture containing n-butanol and n-amyl alcohol / Hao-Yeh Lee in Industrial & engineering chemistry research, Vol. 48 N° 15 (Août 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7186–7204 Titre : Reactive distillation for esterification of an alcohol mixture containing n-butanol and n-amyl alcohol Type de document : texte imprimé Auteurs : Hao-Yeh Lee, Auteur ; Ling-Ting Yen, Auteur ; Chien, I-Lung, Auteur Année de publication : 2009 Article en page(s) : pp. 7186–7204 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Alcohol  mixtures  Esterification Résumé : Manufacturing processes in the semiconductor and pharmaceutical industries often produce alcohol mixture byproducts. Therefore, the esterification of alcohol mixtures may be an important step in reusing wastes from these industries. There are two alternative methods for using the alcohol mixtures as feed for reactive distillation (RD). The first method separates this mixture into pure alcohols first and then follows with esterification using the RD column. The second method uses direct esterification of the alcohol mixture in a RD column, and then separates the mixed-ester products. This paper discusses the esterification of a n-butanol (BuOH) and n-amyl alcohol (AmOH) mixture with acetic acid (HAc). This study presents two important results based on optimizing the total annual cost (TAC). First, the mixed BuOH/AmOH system, with direct esterification with RD followed by product separation, is more economical than the system that first separates the mixture. Second, this study proposes a novel economical indirect-sequence design flowsheet with aqueous reflux. Another important issue in this study is the choice of the relative feed location, because the boiling point of acid lies between that of the two alcohols (i.e., BuOH < HAc < AmOH). Reaction kinetics is an important factor to be considered in determining the feed location of the alcohol mixture. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801891q [article] Reactive distillation for esterification of an alcohol mixture containing n-butanol and n-amyl alcohol [texte imprimé] / Hao-Yeh Lee, Auteur ; Ling-Ting Yen, Auteur ; Chien, I-Lung, Auteur . - 2009 . - pp. 7186–7204. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7186–7204 Mots-clés : Alcohol  mixtures  Esterification Résumé : Manufacturing processes in the semiconductor and pharmaceutical industries often produce alcohol mixture byproducts. Therefore, the esterification of alcohol mixtures may be an important step in reusing wastes from these industries. There are two alternative methods for using the alcohol mixtures as feed for reactive distillation (RD). The first method separates this mixture into pure alcohols first and then follows with esterification using the RD column. The second method uses direct esterification of the alcohol mixture in a RD column, and then separates the mixed-ester products. This paper discusses the esterification of a n-butanol (BuOH) and n-amyl alcohol (AmOH) mixture with acetic acid (HAc). This study presents two important results based on optimizing the total annual cost (TAC). First, the mixed BuOH/AmOH system, with direct esterification with RD followed by product separation, is more economical than the system that first separates the mixture. Second, this study proposes a novel economical indirect-sequence design flowsheet with aqueous reflux. Another important issue in this study is the choice of the relative feed location, because the boiling point of acid lies between that of the two alcohols (i.e., BuOH < HAc < AmOH). Reaction kinetics is an important factor to be considered in determining the feed location of the alcohol mixture. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801891q