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Role of surface mor...
Role of surface morphology in bed particle layer formation on quartz bed particles in fluidized bed combustion of woody biomass
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- Valizadeh, Ali (author)
- Luleå tekniska universitet,Energivetenskap,Energy Engineering, Division of Energy Science, Luleå University of Technology, Luleå, Sweden
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- Skoglund, Nils (author)
- Umeå universitet,Institutionen för tillämpad fysik och elektronik,Department of Applied Physics and Electronics, Umeå University, SE-90187 Umeå, Sweden
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- Forsberg, Fredrik (author)
- Luleå tekniska universitet,Strömningslära och experimentell mekanik,Division of Fluid and Experimental Mechanics, Luleå University of Technology, Luleå, Sweden
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- Lycksam, Henrik (author)
- Luleå tekniska universitet,Strömningslära och experimentell mekanik,Division of Fluid and Experimental Mechanics, Luleå University of Technology, Luleå, Sweden
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- Öhman, Marcus, 1969- (author)
- Luleå tekniska universitet,Energivetenskap,Energy Engineering, Division of Energy Science, Luleå University of Technology, Luleå, Sweden
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(creator_code:org_t)
- Elsevier Ltd, 2024
- 2024
- English.
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In: Fuel. - : Elsevier Ltd. - 0016-2361 .- 1873-7153. ; 357:part A
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Abstract
Subject headings
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- The influence of quartz bed particle surface morphology on the bed particle layer and crack layer formation process in fluidized bed combustion of woody biomass was investigated in this work. Bed material samples were collected at different sampling times from the startup with a fresh bed in industrial scale bubbling fluidized bed (BFB) and circulating fluidized bed (CFB) boilers, both utilizing woody biomass. X-ray microtomography (XMT) and scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS) were employed to characterize bed particle layers and crack layers in the samples. Results showed that there is a noticeable difference between the bed layer characteristics over the so-called “concave” and “convex”-shaped morphologies on the bed particle surface with respect to layer formation. The concave areas are mainly covered with a thin inner layer, whilst the convex display a comparably thick inner layer and an outer layer. In addition, 3D images of the particles revealed that the crack layers mainly originate from concave areas where the particle is less protected by an outer bed particle layer in conjunction with cracks in the inner layer.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Keyword
- Bed material
- Industrial-scale
- Time-resolved
- X-ray tomography
- Energiteknik
- Energy Engineering
- Experimentell mekanik
- Experimental Mechanics
- Strömningslära
- Fluid Mechanics
Publication and Content Type
- ref (subject category)
- art (subject category)
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