Jump to ContentJump to Main Navigation
Show Summary Details
More options …

International Journal of Chemical Reactor Engineering

Ed. by de Lasa, Hugo / Xu, Charles Chunbao

6 Issues per year

IMPACT FACTOR 2016: 0.623
5-year IMPACT FACTOR: 0.761

CiteScore 2016: 0.58

SCImago Journal Rank (SJR) 2016: 0.224
Source Normalized Impact per Paper (SNIP) 2016: 0.297

See all formats and pricing
More options …

Modeling, Simulation and Optimal Control of Ethylene Polymerization in Non-Isothermal, High-Pressure Tubular Reactors

Fred Z Yao / Ali Lohi / Simant R. Upreti / Ramdhane Dhib
Published Online: 2004-06-23 | DOI: https://doi.org/10.2202/1542-6580.1152

Low-density polyethylene (LDPE) is a very important polymer, which is usually produced through a free radical polymerization process in high-pressure tubular reactors. In this study, the mathematical model of this process is developed on the basis of a comprehensive reaction mechanism to accurately determine polymerization rate, and polymer properties under extreme temperature conditions. The model comprises of (i) the mass balances of monomer, initiator, solvent, live radicals and dead polymer chains, and (ii) the energy balances of a tubular LDPE reactor, and its jacket under steady state condition. The model considers the variations in the density and viscosity of reactants along reactor length. Computer simulation of the model is successfully carried out to accurately describe the performance of a non-isothermal, high-pressure, industrial LDPE reactor with multiple initiator injections. Based on the developed non-linear model, the optimal control of the industrial reactor is carried out using genetic algorithms to maximize monomer conversion using jacket temperature as a control function of reactor length. The application of optimal control leads to significant improvements in the final monomer conversion, and capacity utilization of the reactor.

Keywords: kinetics; polyethylene; tubular reactor; optimal control; genetic algorithms

About the article

Published Online: 2004-06-23

Citation Information: International Journal of Chemical Reactor Engineering, ISSN (Online) 1542-6580, DOI: https://doi.org/10.2202/1542-6580.1152.

Export Citation

©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston. Copyright Clearance Center

Citing Articles

Here you can find all Crossref-listed publications in which this article is cited. If you would like to receive automatic email messages as soon as this article is cited in other publications, simply activate the “Citation Alert” on the top of this page.

A Azmi and N Aziz
IOP Conference Series: Materials Science and Engineering, 2016, Volume 162, Number 1, Page 012023
B. S. Sundaram, S. R. Upreti, and A. Lohi
Journal of Applied Polymer Science, 2006, Volume 102, Number 3, Page 2799
Baranitharan S. Sundaram, Simant R. Upreti, and Ali Lohi
Macromolecular Theory and Simulations, 2005, Volume 14, Number 6, Page 374
Peter M.M. Van Erdeghem, Filip Logist, Christoph Dittrich, and Jan F. Van Impe
Computers & Chemical Engineering, 2012, Volume 37, Page 40
Naveen Agrawal, G.P. Rangaiah, Ajay K. Ray, and Santosh K. Gupta
Chemical Engineering Science, 2007, Volume 62, Number 9, Page 2346

Comments (0)

Please log in or register to comment.
Log in