PolymerS Ltd

Thessaloníki, Greece

PolymerS Ltd

Thessaloníki, Greece
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Krallis A.,PolymerS Ltd | Pladis P.,Greek Chemical Process Engineering Research Institute | Kanellopoulos V.,Greek Chemical Process Engineering Research Institute | Saliakas V.,Greek Chemical Process Engineering Research Institute | And 4 more authors.
Computer Aided Chemical Engineering | Year: 2010

As the polymer industry becomes more global and competitive pressures are intensifying, polymer manufacturers recognize the need for the development of advanced process simulators for polymer plants. The overall goal is to utilize powerful, flexible, adaptive design and predictive simulation tools that can follow and predict the behaviour of polymer production processes in an accurate, prompt and comprehensive way. In response to the current needs, a new generation of software packages has been developed for the simulation, design, parameter and state estimation, optimization and control of specific polymerization processes aiming at increasing plant efficiency, improving product quality and reducing the impact to environment. The new software tools provide a user-friendly interface, including an object-oriented design environment that can be accessed from the engineer's windows-based desktop environment and provide full graphical interaction and expert system guidance on how to use the program or making engineering decisions (such as selection of unit operation or physical property method). Moreover, an open-system architecture is adopted and applied to the process modeling components (PMCs) in order to be transparent to any other compatible process modeling environment (PME). Finally, recent advances regarding the development of software applications for specific polymerization systems (i.e., an LDPE high-pressure tubular reactor process and a PVC batch suspension process) are presented. © 2010 Elsevier B.V. All rights reserved.


Kiparissides C.,Aristotle University of Thessaloniki | Kiparissides C.,Greek Chemical Process Engineering Research Institute | Kiparissides C.,PolymerS Ltd | Krallis A.,Greek Chemical Process Engineering Research Institute | And 4 more authors.
Chemical Engineering and Technology | Year: 2010

A generalized multiscale modeling framework is described for the digital simulation of a high-pressure low-density polyethylene (LDPE) tubular reactor. According to the proposed modeling approach, various models describing the complex physical and chemical phenomena at different length and time scales are linked together to assess the effects of reactor operating conditions on the molecular and rheological behavior of LDPE. The molecular properties of LDPE are determined by employing a comprehensive kinetic scheme. On the basis of the postulated kinetic mechanism, detailed population balance equations (PBEs) are derived describing the conservation of the various macromolecular polymer chains. A review of the potential methods for solving the governing PBEs is presented. In addition, a novel kinetic/topology Monte Carlo method to calculate the molecular and topological properties of the highly branched polymer chains and an advanced rheological model for the calculation of the viscoelastic properties of branched polymers in terms of their respective molecular and topological properties are described.A multiscale modeling approach for the simulation of free-radical polymerization processes is presented. Various mathematical models describing the complex physicochemical phenomena are applied to simulate the dynamic behavior of the various units and sub-units in a polymerization plant. The models are solved via the application of advanced numerical methods for the prediction of the polymer molecular and end-use properties. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Krallis A.,Polymers Ltd. | Pladis P.,Greek Chemical Process Engineering Research Institute | Kanellopoulos V.,Greek Chemical Process Engineering Research Institute | Kiparissides C.,Polymers Ltd. | And 2 more authors.
Macromolecular Reaction Engineering | Year: 2010

A new software has been developed for the simulation, design, parameter and state estimation, optimization, and control of specific polymerization processes aiming at increasing plant efficiency, improving product quality, and reducing the impact to environment. It provides a user-friendly interface, including a design environment that can be accessed from the engineer's desktop computer, allowing graphical interaction and expert system guidance on how to use the program or make engineering decisions. The software design allows the collection of models from different sources leading to an easy and comprehensive synthesis of process models. Recent advances regarding the development of software applications for three specific polymerization systems are presented. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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