Enhancing the post-combustion carbon dioxide carbon capture plant performance by setpoints optimization of the decentralized multi-loop and cascade control system

Flavia-Maria Ilea, Ana-Maria Cormos, Vasile-Mircea Cristea and Calin-Cristian Cormos

Energy, 2023, vol. 275, issue C

Abstract: Carbon capture technology using absorption and stripping systems is efficient for mitigating greenhouse gas emissions. Despite of this, high energy penalty and solvent regeneration costs pose significant challenges. Control and optimization cope with these demands. This study proposes a complex decentralized control system with optimized setpoints, aimed to enhance carbon dioxide capture. The control system comprises multiple control loops associated to a new cascade design for carbon capture rate control. A novel two-step approach was developed to find optimal setpoint values for the decentralized control loops, using the support of the design of experiments procedure. Efficiency of carbon capture rate control, absorption rate, energy efficiency and overall performance indicator indexes were considered. Compared to the benchmark case, results of implementing the proposed control system with optimized setpoints showed 24% reduction of mean absolute error of the carbon capture rate controller, 3% decrease of energy performance index and 1% improvement of absorption rate. Rapid restoration of optimal carbon capture state was achieved despite the influent flue gas disturbance, leading to 1.5% reduction of the overall performance indicator. Results demonstrated the potential of the proposed control system to enhance the operational efficiency of carbon capture plants.

Keywords: Post-combustion carbon capture; Decentralized control; Energy performance; Cascade control (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:275:y:2023:i:c:s0360544223008848

DOI: 10.1016/j.energy.2023.127490

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