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Constructive molecular weight control of continuous homopolymer reactors / Pablo González ; Jesus Alvarez in Industrial & engineering chemistry research, Vol. 47 n°24 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°24 (Décembre 2008) . - p. 9971–9982 Titre : Constructive molecular weight control of continuous homopolymer reactors Type de document : texte imprimé Auteurs : Pablo González, Auteur ; Jesus Alvarez, Auteur Année de publication : 2009 Article en page(s) : p. 9971–9982 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Molecular  Homopolymer Résumé : In this work, the problem of controlling (possibly open-loop unstable) continuous free-radical solution polymer reactors with continuous measurements of temperature, level and flows and discrete-delayed (DD) measurements of molecular weight (MW) is addressed. On the basis of physical insight and the relative degrees and detectability structure of the reactor system, a muti-input−multi-output (MIMO) interlaced observer-control design is performed within a constructive framework, yielding a linear-decentralized control scheme with volume, temperature, and monomer components driven by continuous-instantaneous measurements, and a MW component driven by DD measurements. The scheme has reduced modeling requirements and conventional-like tuning guidelines drawn from stability considerations. The proposed approach is illustrated and tested with a representative example through simulations. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071361r [article] Constructive molecular weight control of continuous homopolymer reactors [texte imprimé] / Pablo González, Auteur ; Jesus Alvarez, Auteur . - 2009 . - p. 9971–9982. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°24 (Décembre 2008) . - p. 9971–9982 Mots-clés : Molecular  Homopolymer Résumé : In this work, the problem of controlling (possibly open-loop unstable) continuous free-radical solution polymer reactors with continuous measurements of temperature, level and flows and discrete-delayed (DD) measurements of molecular weight (MW) is addressed. On the basis of physical insight and the relative degrees and detectability structure of the reactor system, a muti-input−multi-output (MIMO) interlaced observer-control design is performed within a constructive framework, yielding a linear-decentralized control scheme with volume, temperature, and monomer components driven by continuous-instantaneous measurements, and a MW component driven by DD measurements. The scheme has reduced modeling requirements and conventional-like tuning guidelines drawn from stability considerations. The proposed approach is illustrated and tested with a representative example through simulations. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071361r