A reduced fidelity model for the rotary chemical looping combustion reactor

Handle URI:
http://hdl.handle.net/10754/625116
Title:
A reduced fidelity model for the rotary chemical looping combustion reactor
Authors:
Iloeje, Chukwunwike O.; Zhao, Zhenlong; Ghoniem, Ahmed F.
Abstract:
The rotary chemical looping combustion reactor has great potential for efficient integration with CO capture-enabled energy conversion systems. In earlier studies, we described a one-dimensional rotary reactor model, and used it to demonstrate the feasibility of continuous reactor operation. Though this detailed model provides a high resolution representation of the rotary reactor performance, it is too computationally expensive for studies that require multiple model evaluations. Specifically, it is not ideal for system-level studies where the reactor is a single component in an energy conversion system. In this study, we present a reduced fidelity model (RFM) of the rotary reactor that reduces computational cost and determines an optimal combination of variables that satisfy reactor design requirements. Simulation results for copper, nickel and iron-based oxygen carriers show a four-order of magnitude reduction in simulation time, and reasonable prediction accuracy. Deviations from the detailed reference model predictions range from 3% to 20%, depending on oxygen carrier type and operating conditions. This study also demonstrates how the reduced model can be modified to deal with both optimization and design oriented problems. A parametric study using the reduced model is then applied to analyze the sensitivity of the optimal reactor design to changes in selected operating and kinetic parameters. These studies show that temperature and activation energy have a greater impact on optimal geometry than parameters like pressure or feed fuel fraction for the selected oxygen carrier materials.
Citation:
Iloeje CO, Zhao Z, Ghoniem AF (2017) A reduced fidelity model for the rotary chemical looping combustion reactor. Applied Energy 190: 725–739. Available: http://dx.doi.org/10.1016/j.apenergy.2016.12.072.
Publisher:
Elsevier BV
Journal:
Applied Energy
Issue Date:
11-Jan-2017
DOI:
10.1016/j.apenergy.2016.12.072
Type:
Article
ISSN:
0306-2619
Sponsors:
This study was financially supported by a grant from the MASDAR Institute of Science and Technology and the King Abdullah University of Science and Technology (KAUST) Investigator Award.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorIloeje, Chukwunwike O.en
dc.contributor.authorZhao, Zhenlongen
dc.contributor.authorGhoniem, Ahmed F.en
dc.date.accessioned2017-06-21T06:51:52Z-
dc.date.available2017-06-21T06:51:52Z-
dc.date.issued2017-01-11en
dc.identifier.citationIloeje CO, Zhao Z, Ghoniem AF (2017) A reduced fidelity model for the rotary chemical looping combustion reactor. Applied Energy 190: 725–739. Available: http://dx.doi.org/10.1016/j.apenergy.2016.12.072.en
dc.identifier.issn0306-2619en
dc.identifier.doi10.1016/j.apenergy.2016.12.072en
dc.identifier.urihttp://hdl.handle.net/10754/625116-
dc.description.abstractThe rotary chemical looping combustion reactor has great potential for efficient integration with CO capture-enabled energy conversion systems. In earlier studies, we described a one-dimensional rotary reactor model, and used it to demonstrate the feasibility of continuous reactor operation. Though this detailed model provides a high resolution representation of the rotary reactor performance, it is too computationally expensive for studies that require multiple model evaluations. Specifically, it is not ideal for system-level studies where the reactor is a single component in an energy conversion system. In this study, we present a reduced fidelity model (RFM) of the rotary reactor that reduces computational cost and determines an optimal combination of variables that satisfy reactor design requirements. Simulation results for copper, nickel and iron-based oxygen carriers show a four-order of magnitude reduction in simulation time, and reasonable prediction accuracy. Deviations from the detailed reference model predictions range from 3% to 20%, depending on oxygen carrier type and operating conditions. This study also demonstrates how the reduced model can be modified to deal with both optimization and design oriented problems. A parametric study using the reduced model is then applied to analyze the sensitivity of the optimal reactor design to changes in selected operating and kinetic parameters. These studies show that temperature and activation energy have a greater impact on optimal geometry than parameters like pressure or feed fuel fraction for the selected oxygen carrier materials.en
dc.description.sponsorshipThis study was financially supported by a grant from the MASDAR Institute of Science and Technology and the King Abdullah University of Science and Technology (KAUST) Investigator Award.en
dc.publisherElsevier BVen
dc.subjectChemical looping combustionen
dc.subjectCO2 captureen
dc.subjectReactor optimizationen
dc.subjectReduced fidelity modelen
dc.subjectRotary reactoren
dc.subjectSensitivity analysisen
dc.titleA reduced fidelity model for the rotary chemical looping combustion reactoren
dc.typeArticleen
dc.identifier.journalApplied Energyen
dc.contributor.institutionDepartment of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, United Statesen
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