Control of a post-combustion CO2 capture plant during process start-up and load variations

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Abstract

Dynamic and flexible operation of a carbon capture plant is important as thermal power plants must be operated very flexibly to accommodate large shares of intermittent energy sources such as wind and solar energy. To facilitate such operation, dynamic models for simulation, optimization and control system design are crucial. In this paper, we present a dynamic mathematical model for the absorption and desorption columns in a carbon capture plant. Moreover, we implement a decentralized proportional-integral (PI) based control scheme and we evaluate the performance of the control structure for various operational procedures, e.g. start-up, load changes, noise on the flue gas flow rate and composition. Note that the carbon capture plant is based on the solvent storage configuration. To the authors knowledge, this is the first paper addressing the issue of start-up operation and control of carbon capture. The study demonstrates that the implemented control structure keeps the carbon capture process at 90% CO2 removal rate with a deviation up to 8% during load variations. In addition, it reveals that the control structure brings the process to the desired set point in approximately 10 min during process start-up. [All rights reserved Elsevier].
Original languageEnglish
Title of host publication Proceedings of the 9th International Symposium on Advanced Control of Chemical Processes
Volume48
PublisherElsevier
Publication date2015
Pages580-585
DOIs
Publication statusPublished - 2015
Event9th International Symposium on Advanced Control of Chemical Processes - Whistler, Canada
Duration: 7 Jun 201510 Jun 2015
http://adchem2015.org/

Conference

Conference9th International Symposium on Advanced Control of Chemical Processes
Country/TerritoryCanada
CityWhistler
Period07/06/201510/06/2015
Internet address
SeriesIFAC-PapersOnLine
ISSN2405-8963

Keywords

  • Process applications
  • Energy processes and control
  • Modeling and identification

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