Documents disponibles écrits par cet auteur

Design and control of dimethyl carbonate−methanol separation via extractive distillation in the dimethyl carbonate reactive-distillation process / Hsu, Kai-Yi in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 735–749 Titre : Design and control of dimethyl carbonate−methanol separation via extractive distillation in the dimethyl carbonate reactive-distillation process Type de document : texte imprimé Auteurs : Hsu, Kai-Yi, Auteur ; Hsiao, Yuan-Chang, Auteur ; Chien, I-Lung, Auteur Année de publication : 2010 Article en page(s) : pp 735–749 Note générale : Génie chimique Langues : Anglais (eng) Mots-clés : Dimethyl  carbonate  Methanol  Ethylene  Reactive  distillation. Résumé : Dimethyl carbonate is an environmentally benign and biodegradable chemical. It can be produced by a transesterification reaction of methanol with ethylene carbonate, coproducing another useful product, ethylene glycol. A reactive distillation column can be utilized for the complete conversion of ethylene carbonate with methanol in excess. The coproduct, ethylene glycol, is the bottom product while the top product of this reactive distillation column is a mixture of dimethyl carbonate and methanol close to the azeotropic composition. In this paper, an economical separation process via extractive distillation is proposed to obtain pure dimethyl carbonate product and also pure methanol to be recycled to the reactive distillation column. A very simple procedure is proposed in this paper for the quick comparison of alternative entrainer candidates before rigorous process simulation is conducted. Aniline is found to be a very effective entrainer to enhance the relative volatility between methanol and dimethyl carbonate. A problem with small heavy-boiler impurities in the feed stream of the extractive distillation process is also pointed out, with a practical solution given for this problem. Simple overall control strategy of this process is also proposed to maintain product purity despite various feed disturbances. Only one tray temperature control loop is required for each of the columns. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901157g [article] Design and control of dimethyl carbonate−methanol separation via extractive distillation in the dimethyl carbonate reactive-distillation process [texte imprimé] / Hsu, Kai-Yi, Auteur ; Hsiao, Yuan-Chang, Auteur ; Chien, I-Lung, Auteur . - 2010 . - pp 735–749. Génie chimique Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 735–749 Mots-clés : Dimethyl  carbonate  Methanol  Ethylene  Reactive  distillation. Résumé : Dimethyl carbonate is an environmentally benign and biodegradable chemical. It can be produced by a transesterification reaction of methanol with ethylene carbonate, coproducing another useful product, ethylene glycol. A reactive distillation column can be utilized for the complete conversion of ethylene carbonate with methanol in excess. The coproduct, ethylene glycol, is the bottom product while the top product of this reactive distillation column is a mixture of dimethyl carbonate and methanol close to the azeotropic composition. In this paper, an economical separation process via extractive distillation is proposed to obtain pure dimethyl carbonate product and also pure methanol to be recycled to the reactive distillation column. A very simple procedure is proposed in this paper for the quick comparison of alternative entrainer candidates before rigorous process simulation is conducted. Aniline is found to be a very effective entrainer to enhance the relative volatility between methanol and dimethyl carbonate. A problem with small heavy-boiler impurities in the feed stream of the extractive distillation process is also pointed out, with a practical solution given for this problem. Simple overall control strategy of this process is also proposed to maintain product purity despite various feed disturbances. Only one tray temperature control loop is required for each of the columns. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901157g

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 heterogeneous azeotropic column system for the separation of pyridine and water / Yi Chang Wu in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10564–10576 Titre : Design and control of heterogeneous azeotropic column system for the separation of pyridine and water Type de document : texte imprimé Auteurs : Yi Chang Wu, Auteur ; Chien, I-Lung, Auteur Année de publication : 2010 Article en page(s) : pp. 10564–10576 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Design--Control--Heterogeneous--Azeotropic--Column--  Separation--Pyridine Résumé : The design and control of two types of separation systems using heterogeneous azeotropic distillation have been studied in the literature. One type (e.g., isopropyl alcohol dehydration) is to add a light entrainer (cyclohexane) into the system so that a minimum-boiling ternary azeotrope is formed which can split into two liquid phases in a decanter. This type of system also introduces two additional azeotropes (isopropyl alcohol−cyclohexane and water−cyclohexane), thus dividing the ternary system into three distillation regions. Another type (e.g., acetic acid dehydration) does not contain azeotrope in the original system. However, due to a tangent pinch near the pure water end an entrainer (isobutyl acetate) is added into the system to aid the separation. This type of system has only one binary heterogeneous azeotrope (water−isobutyl acetate); thus there is only one distillation region. In this paper, design and control of a different residue curve map (RCM) type of separation system utilizing heterogeneous azeotropic distillation will be studied. An example of this RCM type is pyridine and water separation using toluene as entrainer. Adding toluene into this system introduces two additional azeotropes, one is minimum-boiling binary heterogeneous azeotrope (water−toluene) and the other one is a binary homogeneous azeotrope (pyridine−toluene). There is no ternary azeotrope for this system. Two alternative design flow sheets are compared in this paper to find the one which is most economical and also meet stringent product purity specifications. A simple overall control strategy of this process has also been developed which requires only one temperature control loop in each column. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901231s [article] Design and control of heterogeneous azeotropic column system for the separation of pyridine and water [texte imprimé] / Yi Chang Wu, Auteur ; Chien, I-Lung, Auteur . - 2010 . - pp. 10564–10576. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10564–10576 Mots-clés : Design--Control--Heterogeneous--Azeotropic--Column--  Separation--Pyridine Résumé : The design and control of two types of separation systems using heterogeneous azeotropic distillation have been studied in the literature. One type (e.g., isopropyl alcohol dehydration) is to add a light entrainer (cyclohexane) into the system so that a minimum-boiling ternary azeotrope is formed which can split into two liquid phases in a decanter. This type of system also introduces two additional azeotropes (isopropyl alcohol−cyclohexane and water−cyclohexane), thus dividing the ternary system into three distillation regions. Another type (e.g., acetic acid dehydration) does not contain azeotrope in the original system. However, due to a tangent pinch near the pure water end an entrainer (isobutyl acetate) is added into the system to aid the separation. This type of system has only one binary heterogeneous azeotrope (water−isobutyl acetate); thus there is only one distillation region. In this paper, design and control of a different residue curve map (RCM) type of separation system utilizing heterogeneous azeotropic distillation will be studied. An example of this RCM type is pyridine and water separation using toluene as entrainer. Adding toluene into this system introduces two additional azeotropes, one is minimum-boiling binary heterogeneous azeotrope (water−toluene) and the other one is a binary homogeneous azeotrope (pyridine−toluene). There is no ternary azeotrope for this system. Two alternative design flow sheets are compared in this paper to find the one which is most economical and also meet stringent product purity specifications. A simple overall control strategy of this process has also been developed which requires only one temperature control loop in each column. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901231s

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

Two-stripper/decanter flowsheet for methanol recovery in the TAME reactive-distillation process / Yi Chang Wu in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10532–10540 Titre : Two-stripper/decanter flowsheet for methanol recovery in the TAME reactive-distillation process Type de document : texte imprimé Auteurs : Yi Chang Wu, Auteur ; Chien, I-Lung, Auteur Année de publication : 2010 Article en page(s) : pp. 10532–10540 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Two-Stripper/Decanter--Flowsheet--Methanol--Recovery--TAME--Reactive-Distillation--Process Résumé : The process to produce TAME via reactive distillation requires a methanol-recovery section because the presence of C5/methanol azeotropes means that a significant amount of methanol is present in the distillate from the reactive column. The use of pressure-swing azeotropic distillation and extractive distillation were studied in a previous paper in which both the steady-state design and the plantwide control of the entire process were developed. This paper considers a third alternative flowsheet for the separation of the C5/methanol azeotropes that takes advantage of the heterogeneity of the azeotrope. Two stripping columns and a decanter are used. The total annual cost of this flowsheet is a factor of 4 less than that of the pressure-swing system. The system is demonstrated to be easy to control by controlling a tray temperature in each stripping column. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900670f [article] Two-stripper/decanter flowsheet for methanol recovery in the TAME reactive-distillation process [texte imprimé] / Yi Chang Wu, Auteur ; Chien, I-Lung, Auteur . - 2010 . - pp. 10532–10540. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10532–10540 Mots-clés : Two-Stripper/Decanter--Flowsheet--Methanol--Recovery--TAME--Reactive-Distillation--Process Résumé : The process to produce TAME via reactive distillation requires a methanol-recovery section because the presence of C5/methanol azeotropes means that a significant amount of methanol is present in the distillate from the reactive column. The use of pressure-swing azeotropic distillation and extractive distillation were studied in a previous paper in which both the steady-state design and the plantwide control of the entire process were developed. This paper considers a third alternative flowsheet for the separation of the C5/methanol azeotropes that takes advantage of the heterogeneity of the azeotrope. Two stripping columns and a decanter are used. The total annual cost of this flowsheet is a factor of 4 less than that of the pressure-swing system. The system is demonstrated to be easy to control by controlling a tray temperature in each stripping column. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900670f