Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking
Several studies have reported the importance of optimally operating the absorption column in a post-combustion CO<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn&...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/3/1140 |
| _version_ | 1797487969658994688 |
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| author | Benjamin Decardi-Nelson Jinfeng Liu |
| author_facet | Benjamin Decardi-Nelson Jinfeng Liu |
| author_sort | Benjamin Decardi-Nelson |
| collection | DOAJ |
| description | Several studies have reported the importance of optimally operating the absorption column in a post-combustion CO<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> capture (PCC) plant. It has been demonstrated in our previous work how economic model predictive control (EMPC) has a great potential to improve the operation of the PCC plant. However, the use of a general economic objective such as maximizing the absorption efficiency of the column can cause EMPC to drive the state of the system close to the constraints. This may lead to solvent overcirculation and flooding, which are undesirable. In this work, we present an EMPC with zone tracking algorithm as an effective means to address this problem. The proposed control algorithm incorporates a zone tracking objective and an economic objective to form a multi-objective optimal control problem. To ensure that the zone tracking objective is achieved in the presence of model uncertainties and time-varying flue gas flow rate, we propose a method to modify the original target zone with a control invariant set. The zone modification method combines both ellipsoidal control invariant set techniques and a back-off strategy. The use of ellipsoidal control invariant sets ensure that the method is applicable to large scale systems such as the absorption column. We present several simulation case studies that demonstrate the effectiveness and applicability of the proposed control algorithm to the absorption column in a post-combustion CO<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> capture plant. |
| first_indexed | 2024-03-09T23:55:23Z |
| format | Article |
| id | doaj.art-55f8475ecf814706873d4376c49fc05e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T23:55:23Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-55f8475ecf814706873d4376c49fc05e2023-11-23T16:25:50ZengMDPI AGEnergies1996-10732022-02-01153114010.3390/en15031140Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone TrackingBenjamin Decardi-Nelson0Jinfeng Liu1Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, CanadaDepartment of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, CanadaSeveral studies have reported the importance of optimally operating the absorption column in a post-combustion CO<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> capture (PCC) plant. It has been demonstrated in our previous work how economic model predictive control (EMPC) has a great potential to improve the operation of the PCC plant. However, the use of a general economic objective such as maximizing the absorption efficiency of the column can cause EMPC to drive the state of the system close to the constraints. This may lead to solvent overcirculation and flooding, which are undesirable. In this work, we present an EMPC with zone tracking algorithm as an effective means to address this problem. The proposed control algorithm incorporates a zone tracking objective and an economic objective to form a multi-objective optimal control problem. To ensure that the zone tracking objective is achieved in the presence of model uncertainties and time-varying flue gas flow rate, we propose a method to modify the original target zone with a control invariant set. The zone modification method combines both ellipsoidal control invariant set techniques and a back-off strategy. The use of ellipsoidal control invariant sets ensure that the method is applicable to large scale systems such as the absorption column. We present several simulation case studies that demonstrate the effectiveness and applicability of the proposed control algorithm to the absorption column in a post-combustion CO<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> capture plant.https://www.mdpi.com/1996-1073/15/3/1140predictive controlrobustnesszone trackingpost-combustion carbon capturenonlinear systems |
| spellingShingle | Benjamin Decardi-Nelson Jinfeng Liu Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking Energies predictive control robustness zone tracking post-combustion carbon capture nonlinear systems |
| title | Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking |
| title_full | Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking |
| title_fullStr | Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking |
| title_full_unstemmed | Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking |
| title_short | Robust Economic MPC of the Absorption Column in Post-Combustion Carbon Capture through Zone Tracking |
| title_sort | robust economic mpc of the absorption column in post combustion carbon capture through zone tracking |
| topic | predictive control robustness zone tracking post-combustion carbon capture nonlinear systems |
| url | https://www.mdpi.com/1996-1073/15/3/1140 |
| work_keys_str_mv | AT benjamindecardinelson robusteconomicmpcoftheabsorptioncolumninpostcombustioncarboncapturethroughzonetracking AT jinfengliu robusteconomicmpcoftheabsorptioncolumninpostcombustioncarboncapturethroughzonetracking |