Model of combustion and dispersion of carbon deposited on porous bed material during bubbling fluidized bed combustion |
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Authors: | I Nyoman Suprapta Winaya Tadaaki Shimizu Yousuke Nonaka Kazuaki Yamagiwa |
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Affiliation: | aGraduate School of Science and Technology, Niigata University, 2-8050 Ikarashi, Niigata 950-2181, Japan;bDepartment of Chemistry and Chemical Engineering, Niigata University, 2-8050 Ikarashi, Niigata 950-2181, Japan |
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Abstract: | Porous bed materials capture volatile matter as carbon deposits during fluidized bed combustion of high-volatile fuels such as biomass and wastes. Carbon deposits burn in a dense bed mixed with bed materials; thereby enhancing horizontal dispersion of carbonaceous materials. Commercial scaling-up requires a model that simultaneously assesses carbon deposit combustion and horizontal solid dispersion. This study measured the carbon deposit combustion rate using a fluidized bed. A one-dimensional model of carbon deposit combustion in a fluidized bed is based on the carbon deposit burning rate. A two-dimensional model incorporates reactions and solid dispersion to predict the horizontal concentration profile. Experiments using a bubbling fluidized bed validated that model. |
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Keywords: | Carbon deposit Burning rate Horizontal dispersion |
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