Economic Cost Function Design and Grade Change Optimization for a Gas Phase Polyethylene Reactor

Per-Ola Larsson, Johan Åkesson, Niklas Andersson

Research output: Contribution to conferencePaper, not in proceedingpeer-review

Abstract

Gas phase polyethylene reactors are able to produce several different grades of polymer. Adapting to market conditions requires grade transitions, associated with costs in terms of raw material and temporary production of lower priced off-specification products. In this paper, both stationary production and dynamic grade transitions are optimized to maximize profit, i.e., economic process optimization. A cost function for transitions that utilizes product quality variable intervals, specifying premium priced products, and that also gives incentives to produce products having quality variables on target, i.e., equal to a defined grade, is designed. A previously published reactor model is extended with quality variable models and several grade transitions are optimized and shown.
Original languageEnglish
Publication statusPublished - 2011
Event50th IEEE Conference on Decision and Control and European Control Conference, 2011 - Orlando, Florida, United States
Duration: 2011 Dec 122011 Dec 15
Conference number: 50
http://www.ieeecss.org/CAB/conferences/cdcecc2011/

Conference

Conference50th IEEE Conference on Decision and Control and European Control Conference, 2011
Abbreviated titlecdcecc2011
Country/TerritoryUnited States
CityOrlando, Florida
Period2011/12/122011/12/15
Internet address

Bibliographical note

key=pol11cdc
project=polygradechange

Subject classification (UKÄ)

  • Control Engineering

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