Almoslh, Adel (2023)
Experimental and Numerical Investigation of the
Absorption Process in Polygeneration.
Technische Universität Darmstadt
doi: 10.26083/tuprints-00023323
Dissertation, Erstveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
Polygeneration plants play an important role in environmental and energy issues. Polygeneration plants are built to produce chemical products such as petroleum products like naphtha and diesel, or to generate electricity in parallel. The importance of polygeneration plants has increased with the continuous increase in energy demand, as their numerous advantages contribute significantly to the flexibility of chemical products or energy supply and their thermodynamic efficiency is higher than that of single product systems. The absorption process is considered essential in polygeneration plants, as it removes harmful gases such as acid gas from the produced syngas. The absorption process is usually designed for steady-state operation. However, operating the absorption process varies over time. Sometimes, this is due to the change in load, startup, or shutdown. The study of the unsteady state of the absorption process due to load changes is interesting because it helps to reconsider design issues or improve the behavior of the absorption process during the unsteady state. In this work, the background of the main processes in the Polygeneration plant was presented. A laboratory-scale absorber test rig was built at the Institute of Energy Systems and Technology (EST) at Technical University of Darmstadt. The absorber test rig was commissioned to verify that it operates safely and meets the experimental requirements for which it was built. The steady-state and the dynamic state of the absorption process were conducted in the absorber test rig. The models of the absorption process are presented. A simulation of the absorption process was performed using Aspen PLUS and Aspen PLUS Dynamics simulation programs. The simulation results were validated with the experimental results. It was found that the different load changes and the different change rates of the gas and solvent have a significant effect on the acid gas concentration at the outlet of the absorber. The correlation between the behavior of the absorber during the transient state and the hydrodynamic properties of the sieve tray was investigated. It was found that the hydrodynamic properties of the sieve tray have a significant influence on the performance of the absorber during the transient state. Finally, the conclusion and the outlook were presented.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2023 | ||||
Autor(en): | Almoslh, Adel | ||||
Art des Eintrags: | Erstveröffentlichung | ||||
Titel: | Experimental and Numerical Investigation of the Absorption Process in Polygeneration | ||||
Sprache: | Englisch | ||||
Referenten: | Epple, Prof. Dr. Bernd ; Sadiki, Prof. Dr. Amsini ; Alobaid, Dr.-Ing. Falah | ||||
Publikationsjahr: | 2023 | ||||
Ort: | Darmstadt | ||||
Kollation: | xxv, 183 Seiten | ||||
Datum der mündlichen Prüfung: | 6 Dezember 2022 | ||||
DOI: | 10.26083/tuprints-00023323 | ||||
URL / URN: | https://tuprints.ulb.tu-darmstadt.de/23323 | ||||
Kurzbeschreibung (Abstract): | Polygeneration plants play an important role in environmental and energy issues. Polygeneration plants are built to produce chemical products such as petroleum products like naphtha and diesel, or to generate electricity in parallel. The importance of polygeneration plants has increased with the continuous increase in energy demand, as their numerous advantages contribute significantly to the flexibility of chemical products or energy supply and their thermodynamic efficiency is higher than that of single product systems. The absorption process is considered essential in polygeneration plants, as it removes harmful gases such as acid gas from the produced syngas. The absorption process is usually designed for steady-state operation. However, operating the absorption process varies over time. Sometimes, this is due to the change in load, startup, or shutdown. The study of the unsteady state of the absorption process due to load changes is interesting because it helps to reconsider design issues or improve the behavior of the absorption process during the unsteady state. In this work, the background of the main processes in the Polygeneration plant was presented. A laboratory-scale absorber test rig was built at the Institute of Energy Systems and Technology (EST) at Technical University of Darmstadt. The absorber test rig was commissioned to verify that it operates safely and meets the experimental requirements for which it was built. The steady-state and the dynamic state of the absorption process were conducted in the absorber test rig. The models of the absorption process are presented. A simulation of the absorption process was performed using Aspen PLUS and Aspen PLUS Dynamics simulation programs. The simulation results were validated with the experimental results. It was found that the different load changes and the different change rates of the gas and solvent have a significant effect on the acid gas concentration at the outlet of the absorber. The correlation between the behavior of the absorber during the transient state and the hydrodynamic properties of the sieve tray was investigated. It was found that the hydrodynamic properties of the sieve tray have a significant influence on the performance of the absorber during the transient state. Finally, the conclusion and the outlook were presented. |
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Alternatives oder übersetztes Abstract: |
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Status: | Verlagsversion | ||||
URN: | urn:nbn:de:tuda-tuprints-233236 | ||||
Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau | ||||
Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Institut für Energiesysteme und Energietechnik (EST) |
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Hinterlegungsdatum: | 14 Mär 2023 13:07 | ||||
Letzte Änderung: | 15 Mär 2023 05:59 | ||||
PPN: | |||||
Referenten: | Epple, Prof. Dr. Bernd ; Sadiki, Prof. Dr. Amsini ; Alobaid, Dr.-Ing. Falah | ||||
Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 6 Dezember 2022 | ||||
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