Documents disponibles écrits par cet auteur

Comparison of control strategies for dividing-wall columns / Ruben C. van Diggelen in Industrial & engineering chemistry research, Vol. 49 N° 1 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 288–307 Titre : Comparison of control strategies for dividing-wall columns Type de document : texte imprimé Auteurs : Ruben C. van Diggelen, Auteur ; Anton A. Kiss, Auteur ; Arnold W. Heemink, Auteur Année de publication : 2010 Article en page(s) : pp. 288–307 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Comparison--Control--Strategies--Dividing-Wall--Columns Résumé : Conventional ternary separations progressed via thermally coupled columns such as Petlyuk configuration to a novel design that integrates two distillation columns into one shell—a setup known today as dividing-wall column (DWC). The DWC concept is a major breakthrough in distillation technology, as it brings significant reduction in the capital invested as well as savings in the operating costs. However, the integration of two columns into one shell leads also to changes in the operating mode and ultimately in the controllability of the system. Although much of the literature focuses on the control of binary distillation columns, there are just a few studies on the controllability of DWC. In this work we explore the DWC control issues and make a comparison of various control strategies based on PID loops, within a multiloop framework (DB/LSV, DV/LSB, LB/DSV, LV/DSB) versus more advanced controllers such as LQG/LQR, GMC, and high order controllers obtained by H∞ controller synthesis and μ-synthesis. The controllers are applied to a dividing-wall column used in an industrial case study—the ternary separation of benzene−toluene−xylene. The performances of these control strategies and the dynamic response of the DWC is investigated in terms of product composition and flow rates, for various persistent disturbances in the feed flow rate and composition. Significantly shorter settling times can be achieved using the advanced controllers based on LQG/LQR, H∞ controller synthesis, and μ-synthesis. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9010673 [article] Comparison of control strategies for dividing-wall columns [texte imprimé] / Ruben C. van Diggelen, Auteur ; Anton A. Kiss, Auteur ; Arnold W. Heemink, Auteur . - 2010 . - pp. 288–307. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 288–307 Mots-clés : Comparison--Control--Strategies--Dividing-Wall--Columns Résumé : Conventional ternary separations progressed via thermally coupled columns such as Petlyuk configuration to a novel design that integrates two distillation columns into one shell—a setup known today as dividing-wall column (DWC). The DWC concept is a major breakthrough in distillation technology, as it brings significant reduction in the capital invested as well as savings in the operating costs. However, the integration of two columns into one shell leads also to changes in the operating mode and ultimately in the controllability of the system. Although much of the literature focuses on the control of binary distillation columns, there are just a few studies on the controllability of DWC. In this work we explore the DWC control issues and make a comparison of various control strategies based on PID loops, within a multiloop framework (DB/LSV, DV/LSB, LB/DSV, LV/DSB) versus more advanced controllers such as LQG/LQR, GMC, and high order controllers obtained by H∞ controller synthesis and μ-synthesis. The controllers are applied to a dividing-wall column used in an industrial case study—the ternary separation of benzene−toluene−xylene. The performances of these control strategies and the dynamic response of the DWC is investigated in terms of product composition and flow rates, for various persistent disturbances in the feed flow rate and composition. Significantly shorter settling times can be achieved using the advanced controllers based on LQG/LQR, H∞ controller synthesis, and μ-synthesis. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9010673

Gas holdup, axial dispersion, and mass transfer studies in bubble columns / Mayank Shah in Industrial & engineering chemistry research, Vol. 51 N° 43 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 14268–14278 Titre : Gas holdup, axial dispersion, and mass transfer studies in bubble columns Type de document : texte imprimé Auteurs : Mayank Shah, Auteur ; Anton A. Kiss, Auteur ; Edwin Zondervan, Auteur Année de publication : 2013 Article en page(s) : pp. 14268–14278 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Gas  Mass  Transfer Résumé : This article presents an extensive study on the gas holdup, axial liquid dispersion, and mass transfer for packed, trayed, and empty bubble columns. Four types of structured packings (Super-Pak, Flexipac, Mellapak, and Gauze) and two types of perforated partition trays (with 25% and 40% tray open area) were used to characterize the packed and trayed bubble columns, respectively. It was observed that the gas holdup and mass transfer characteristics of the packed and trayed bubble columns are superior to those of an empty bubble column, while the axial dispersion coefficients are much lower. This article discusses in detail the effect of the liquid and gas flow rates, liquid-phase viscosity, and type of internals. Additionally, experimental data of the packed, trayed, and empty bubble column are correlated by dimensionless numbers. Novel empirical correlations are proposed for the gas holdup, Bodenstein number (for the axial dispersion coefficient), and Stanton number (for the volumetric mass transfer coefficient), as a function of the Froude and Galileo dimensionless numbers. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301227t [article] Gas holdup, axial dispersion, and mass transfer studies in bubble columns [texte imprimé] / Mayank Shah, Auteur ; Anton A. Kiss, Auteur ; Edwin Zondervan, Auteur . - 2013 . - pp. 14268–14278. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 14268–14278 Mots-clés : Gas  Mass  Transfer Résumé : This article presents an extensive study on the gas holdup, axial liquid dispersion, and mass transfer for packed, trayed, and empty bubble columns. Four types of structured packings (Super-Pak, Flexipac, Mellapak, and Gauze) and two types of perforated partition trays (with 25% and 40% tray open area) were used to characterize the packed and trayed bubble columns, respectively. It was observed that the gas holdup and mass transfer characteristics of the packed and trayed bubble columns are superior to those of an empty bubble column, while the axial dispersion coefficients are much lower. This article discusses in detail the effect of the liquid and gas flow rates, liquid-phase viscosity, and type of internals. Additionally, experimental data of the packed, trayed, and empty bubble column are correlated by dimensionless numbers. Novel empirical correlations are proposed for the gas holdup, Bodenstein number (for the axial dispersion coefficient), and Stanton number (for the volumetric mass transfer coefficient), as a function of the Froude and Galileo dimensionless numbers. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301227t