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Numerical Modeling of Fixed-Bed Cocombustion Processes through the Multiple Thermally Thick Particle Model
[Image: see text] Fixed-bed cocombustion provides opportunities for utilizing various low-quality solid residues, but there still remain obstacles for quantitative numerical modeling. The difficulties originate from the particles in the thermally thick regime and the diverse properties of different...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9648070/ https://www.ncbi.nlm.nih.gov/pubmed/36385872 http://dx.doi.org/10.1021/acsomega.2c04330 |
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author | Deng, Ruiqu Wang, Linzheng Zhang, Ruizhi Luo, Yonghao |
author_facet | Deng, Ruiqu Wang, Linzheng Zhang, Ruizhi Luo, Yonghao |
author_sort | Deng, Ruiqu |
collection | PubMed |
description | [Image: see text] Fixed-bed cocombustion provides opportunities for utilizing various low-quality solid residues, but there still remain obstacles for quantitative numerical modeling. The difficulties originate from the particles in the thermally thick regime and the diverse properties of different fuels. This work presents the multiple thermally thick particle (MTTP) model that considers detailed transport processes and chemical reactions in subparticle and interparticle scales, and different fuels can be assigned with distinctive physical and chemical properties. The model was validated by cocombustion experiments using wood and potato as representatives of low- and high-moisture fuels. The predicted results showed satisfactory agreement with measured values, and the characteristics of asynchronous conversion were clearly revealed. For thermally thick fuels with high moisture content, the drying process extends almost across the whole conversion zone and is highly overlapped with devolatilization process. Consequently, the structure of the in-bed conversion zone is beyond the expectation of conventional fixed-bed combustion theory. |
format | Online Article Text |
id | pubmed-9648070 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-96480702022-11-15 Numerical Modeling of Fixed-Bed Cocombustion Processes through the Multiple Thermally Thick Particle Model Deng, Ruiqu Wang, Linzheng Zhang, Ruizhi Luo, Yonghao ACS Omega [Image: see text] Fixed-bed cocombustion provides opportunities for utilizing various low-quality solid residues, but there still remain obstacles for quantitative numerical modeling. The difficulties originate from the particles in the thermally thick regime and the diverse properties of different fuels. This work presents the multiple thermally thick particle (MTTP) model that considers detailed transport processes and chemical reactions in subparticle and interparticle scales, and different fuels can be assigned with distinctive physical and chemical properties. The model was validated by cocombustion experiments using wood and potato as representatives of low- and high-moisture fuels. The predicted results showed satisfactory agreement with measured values, and the characteristics of asynchronous conversion were clearly revealed. For thermally thick fuels with high moisture content, the drying process extends almost across the whole conversion zone and is highly overlapped with devolatilization process. Consequently, the structure of the in-bed conversion zone is beyond the expectation of conventional fixed-bed combustion theory. American Chemical Society 2022-10-25 /pmc/articles/PMC9648070/ /pubmed/36385872 http://dx.doi.org/10.1021/acsomega.2c04330 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Deng, Ruiqu Wang, Linzheng Zhang, Ruizhi Luo, Yonghao Numerical Modeling of Fixed-Bed Cocombustion Processes through the Multiple Thermally Thick Particle Model |
title | Numerical Modeling
of Fixed-Bed Cocombustion Processes
through the Multiple Thermally Thick Particle Model |
title_full | Numerical Modeling
of Fixed-Bed Cocombustion Processes
through the Multiple Thermally Thick Particle Model |
title_fullStr | Numerical Modeling
of Fixed-Bed Cocombustion Processes
through the Multiple Thermally Thick Particle Model |
title_full_unstemmed | Numerical Modeling
of Fixed-Bed Cocombustion Processes
through the Multiple Thermally Thick Particle Model |
title_short | Numerical Modeling
of Fixed-Bed Cocombustion Processes
through the Multiple Thermally Thick Particle Model |
title_sort | numerical modeling
of fixed-bed cocombustion processes
through the multiple thermally thick particle model |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9648070/ https://www.ncbi.nlm.nih.gov/pubmed/36385872 http://dx.doi.org/10.1021/acsomega.2c04330 |
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