Steady-State and Dynamic Modeling of Gas-Phase Polypropylene Processes Using Stirred-Bed Reactors

Neeraj P. Khare, Bruce Lucas, Kevin C. Seavey, Y. A. Liu, Ashuraj Sirohi, Sundaram Ramanathan, Simon Lingard, Yuhua Song, Chau Chyun Chen

Research output: Contribution to journalArticlepeer-review

79 Scopus citations


This paper describes the development of a comprehensive model for the continuous gas-phase synthesis of polypropylene using stirred-bed reactors. The model considers the important issues of physical property and thermodynamic model selections, polymer properties, catalyst characterization, and reactor residence time, in addition to the traditional Ziegler-Natta polymerization kinetics. Model development involves fundamental chemical engineering principles and advanced software tools, Polymers Plus and Aspen Dynamics. We characterize a Ziegler-Natta catalyst by assuming the existence of multiple catalyst site types. The model contains a single set of kinetic and thermodynamic parameters that accurately predicts the polymer production rate, molecular weight, polydispersity index, and composition for both homopolymer and impact copolymer product grades from a large-scale commercial process. We demonstrate the application of our dynamic model and process control by comparing grade-transition strategies.

Original languageEnglish
Pages (from-to)884-900
Number of pages17
JournalIndustrial and Engineering Chemistry Research
Issue number4
StatePublished - Feb 18 2004


Dive into the research topics of 'Steady-State and Dynamic Modeling of Gas-Phase Polypropylene Processes Using Stirred-Bed Reactors'. Together they form a unique fingerprint.

Cite this