A self-consistent design method of the autothermal dual circulating fluidized bed reactor for in-situ gasification chemical looping combustion of coal
This paper establishes a design method for the autothermal dual circulating fluidized bed reactor (DCFBR) of the coal-fueled in-situ gasification chemical looping combustion (iG-CLC) process. This method, grounded in a self-consistent phenomenological model, comprehensively elucidates the factors of...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-12-01
|
| Series: | Carbon Capture Science & Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772656824001040 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846128146271698944 |
|---|---|
| author | Xi Chen Haibo Zhao |
| author_facet | Xi Chen Haibo Zhao |
| author_sort | Xi Chen |
| collection | DOAJ |
| description | This paper establishes a design method for the autothermal dual circulating fluidized bed reactor (DCFBR) of the coal-fueled in-situ gasification chemical looping combustion (iG-CLC) process. This method, grounded in a self-consistent phenomenological model, comprehensively elucidates the factors of mass and energy conservation, fuel and oxygen carrier (OC) reaction processes, and fluidization characteristics within the reactor. It is particularly suitable for the rapid screening of numerous potential designs, obtaining detailed design parameters, and studying their interrelationships. Utilizing this method, the regulation patterns of dual-bed interactive transport-reaction phenomena within a 5 MWth iG-CLC DCFBR are studied. Firstly, the effects of key design parameters on the OC circulation rate and bed inventory are analyzed. Following this, the impacts of circulation rate on the interactive heat and mass transfer between two beds are examined, delineating a reasonable range for the control of autothermal CLC process (circulation rate of 50–90 kg/m2s, temperature difference of 30–90 °C, OC conversion of 0.2–0.35, and oxygen-fuel ratio of 3–6). Subsequently, this paper investigates the influences of main design parameters on the performance metrics, such as gas/solid fuel conversion, operational costs, and operational benefits. It is found that the carbon stripper significantly enhances the carbon capture efficiency of the device, provided that its separation efficiency is maintained above 70–95 %. Sensitivity analysis is employed to study the response patterns of performance metrics to changes in input parameters. Ultimately, based on these analyses, a design scheme for the 5 MWth reactor is determined, with a detailed examination of the pressure balance state of the reactor under the design conditions, and the balanced material and energy flows at the reactor inlets and outlets. |
| format | Article |
| id | doaj-art-f1a44b2069e841e3bc0f524d65912c3c |
| institution | Kabale University |
| issn | 2772-6568 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Carbon Capture Science & Technology |
| spelling | doaj-art-f1a44b2069e841e3bc0f524d65912c3c2024-12-11T05:58:47ZengElsevierCarbon Capture Science & Technology2772-65682024-12-0113100292A self-consistent design method of the autothermal dual circulating fluidized bed reactor for in-situ gasification chemical looping combustion of coalXi Chen0Haibo Zhao1State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaCorresponding author.; State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaThis paper establishes a design method for the autothermal dual circulating fluidized bed reactor (DCFBR) of the coal-fueled in-situ gasification chemical looping combustion (iG-CLC) process. This method, grounded in a self-consistent phenomenological model, comprehensively elucidates the factors of mass and energy conservation, fuel and oxygen carrier (OC) reaction processes, and fluidization characteristics within the reactor. It is particularly suitable for the rapid screening of numerous potential designs, obtaining detailed design parameters, and studying their interrelationships. Utilizing this method, the regulation patterns of dual-bed interactive transport-reaction phenomena within a 5 MWth iG-CLC DCFBR are studied. Firstly, the effects of key design parameters on the OC circulation rate and bed inventory are analyzed. Following this, the impacts of circulation rate on the interactive heat and mass transfer between two beds are examined, delineating a reasonable range for the control of autothermal CLC process (circulation rate of 50–90 kg/m2s, temperature difference of 30–90 °C, OC conversion of 0.2–0.35, and oxygen-fuel ratio of 3–6). Subsequently, this paper investigates the influences of main design parameters on the performance metrics, such as gas/solid fuel conversion, operational costs, and operational benefits. It is found that the carbon stripper significantly enhances the carbon capture efficiency of the device, provided that its separation efficiency is maintained above 70–95 %. Sensitivity analysis is employed to study the response patterns of performance metrics to changes in input parameters. Ultimately, based on these analyses, a design scheme for the 5 MWth reactor is determined, with a detailed examination of the pressure balance state of the reactor under the design conditions, and the balanced material and energy flows at the reactor inlets and outlets.http://www.sciencedirect.com/science/article/pii/S2772656824001040Chemical looping combustionDual circulating fluidized bedReactor designPhenomenological modelAutothermal operation |
| spellingShingle | Xi Chen Haibo Zhao A self-consistent design method of the autothermal dual circulating fluidized bed reactor for in-situ gasification chemical looping combustion of coal Carbon Capture Science & Technology Chemical looping combustion Dual circulating fluidized bed Reactor design Phenomenological model Autothermal operation |
| title | A self-consistent design method of the autothermal dual circulating fluidized bed reactor for in-situ gasification chemical looping combustion of coal |
| title_full | A self-consistent design method of the autothermal dual circulating fluidized bed reactor for in-situ gasification chemical looping combustion of coal |
| title_fullStr | A self-consistent design method of the autothermal dual circulating fluidized bed reactor for in-situ gasification chemical looping combustion of coal |
| title_full_unstemmed | A self-consistent design method of the autothermal dual circulating fluidized bed reactor for in-situ gasification chemical looping combustion of coal |
| title_short | A self-consistent design method of the autothermal dual circulating fluidized bed reactor for in-situ gasification chemical looping combustion of coal |
| title_sort | self consistent design method of the autothermal dual circulating fluidized bed reactor for in situ gasification chemical looping combustion of coal |
| topic | Chemical looping combustion Dual circulating fluidized bed Reactor design Phenomenological model Autothermal operation |
| url | http://www.sciencedirect.com/science/article/pii/S2772656824001040 |
| work_keys_str_mv | AT xichen aselfconsistentdesignmethodoftheautothermaldualcirculatingfluidizedbedreactorforinsitugasificationchemicalloopingcombustionofcoal AT haibozhao aselfconsistentdesignmethodoftheautothermaldualcirculatingfluidizedbedreactorforinsitugasificationchemicalloopingcombustionofcoal AT xichen selfconsistentdesignmethodoftheautothermaldualcirculatingfluidizedbedreactorforinsitugasificationchemicalloopingcombustionofcoal AT haibozhao selfconsistentdesignmethodoftheautothermaldualcirculatingfluidizedbedreactorforinsitugasificationchemicalloopingcombustionofcoal |