Documents disponibles écrits par cet auteur

Design and control of the glycerol tertiary butyl ethers process for the utilization of a renewable resource / Jian Kai Cheng in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12706-12716 Titre : Design and control of the glycerol tertiary butyl ethers process for the utilization of a renewable resource Type de document : texte imprimé Auteurs : Jian Kai Cheng, Auteur ; Cheng-Lin Lee, Auteur ; Yong-Tang Jhuang, Auteur Année de publication : 2012 Article en page(s) : pp. 12706-12716 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Design Résumé : In this paper, the design and control of an improved process for the manufacture of a fuel additive (glycerol tertiary butyl ethers, GTBE) from glycerol and isobutylene is developed. The improved process redirects one recycle stream, uses a stripping column instead of a flash tank to recover isobutylene, and uses a rectifying column instead of a distillation column to purify the product. Economic analysis shows that the improved process has a 22% lower total annual cost (TAC) than the best known process published in the literature. Significant increases in the selectivity of the overall process from 84.7% to 99.3% can also be realized by comparing the optimized improved design versus the original design. Dynamic simulations were also conducted and indicated that stringent product specification can be met with a simple decentralized feedback control structure despite impurities in the feed streams and also changes in the throughput. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2010516 [article] Design and control of the glycerol tertiary butyl ethers process for the utilization of a renewable resource [texte imprimé] / Jian Kai Cheng, Auteur ; Cheng-Lin Lee, Auteur ; Yong-Tang Jhuang, Auteur . - 2012 . - pp. 12706-12716. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12706-12716 Mots-clés : Design Résumé : In this paper, the design and control of an improved process for the manufacture of a fuel additive (glycerol tertiary butyl ethers, GTBE) from glycerol and isobutylene is developed. The improved process redirects one recycle stream, uses a stripping column instead of a flash tank to recover isobutylene, and uses a rectifying column instead of a distillation column to purify the product. Economic analysis shows that the improved process has a 22% lower total annual cost (TAC) than the best known process published in the literature. Significant increases in the selectivity of the overall process from 84.7% to 99.3% can also be realized by comparing the optimized improved design versus the original design. Dynamic simulations were also conducted and indicated that stringent product specification can be met with a simple decentralized feedback control structure despite impurities in the feed streams and also changes in the throughput. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2010516

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

Determination of catalyst loading and shortcut design for binary reactive distillation / Jian Kai Cheng 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. 11517-11529 Titre : Determination of catalyst loading and shortcut design for binary reactive distillation Type de document : texte imprimé Auteurs : Jian Kai Cheng, Auteur ; Jeffrey D. Ward, Auteur ; Yu, Cheng-Ching, Auteur Année de publication : 2011 Article en page(s) : pp. 11517-11529 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Distillation  with  reaction  Design  Loading  Catalyst Résumé : Determination of the catalyst mass is a challenging problem in the conceptual design of reactive distillation systems. In this work, we use the concept of countercurrent cascaded vapor-liquid reactors (CCRs) to develop a shortcut method for the design of binary reactive distillation columns. An analytical expression for the theoretical minimum catalyst loading can be derived as the number of CCRs approaches infinity. On the basis of this theoretical catalyst loading, we present a calculation procedure to obtain the catalyst mass and other basic process parameters, for example, number of reactive stages and number of separation stages, without a detailed model. Three real binary systems are used to illustrate this shortcut method, and the results show that the estimated shortcut designs are similar to the optimal designs. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23437850 [article] Determination of catalyst loading and shortcut design for binary reactive distillation [texte imprimé] / Jian Kai Cheng, Auteur ; Jeffrey D. Ward, Auteur ; Yu, Cheng-Ching, Auteur . - 2011 . - pp. 11517-11529. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11517-11529 Mots-clés : Distillation  with  reaction  Design  Loading  Catalyst Résumé : Determination of the catalyst mass is a challenging problem in the conceptual design of reactive distillation systems. In this work, we use the concept of countercurrent cascaded vapor-liquid reactors (CCRs) to develop a shortcut method for the design of binary reactive distillation columns. An analytical expression for the theoretical minimum catalyst loading can be derived as the number of CCRs approaches infinity. On the basis of this theoretical catalyst loading, we present a calculation procedure to obtain the catalyst mass and other basic process parameters, for example, number of reactive stages and number of separation stages, without a detailed model. Three real binary systems are used to illustrate this shortcut method, and the results show that the estimated shortcut designs are similar to the optimal designs. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23437850