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Mechanism of Layer ...
Mechanism of Layer Formation on Olivine Bed Particles in Industrial-Scale Dual Fluid Bed Gasification of Wood
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- Kuba, Matthias (author)
- Technische Universität Wien, Institute of Chemical Engineering
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- He, Hanbing (author)
- Luleå tekniska universitet,Energivetenskap,Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Engineering
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- Kirnbauer, Freidrich (author)
- Bioenergy 2020+,Technische Universität Wien, Institute of Chemical Engineering
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- Skoglund, Nils (author)
- Luleå tekniska universitet,Energivetenskap,Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Engineering,Thermochemical Energy Conversion Laboratory
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- Boström, Dan (author)
- Umeå universitet,Institutionen för tillämpad fysik och elektronik,Thermochemical Energy Conversion Laboratory,Umeå University
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- Öhman, Marcus, 1969- (author)
- Luleå tekniska universitet,Energivetenskap,Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Engineering
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- Hoffbauer, Herman (author)
- Technische Universität Wien, Institute of Chemical Engineering
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(creator_code:org_t)
- 2016-08-15
- 2016
- English.
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In: Energy & Fuels. - : American Chemical Society (ACS). - 0887-0624 .- 1520-5029. ; 30:9, s. 7410-7418
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http://pubsdc3.acs.o...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Utilization of biomass as feedstock in dual fluidized bed steam gasification is a promising technology for the substitution of fossil energy carriers. Experience from industrial-scale power plants showed an alteration of the olivine bed material due to interaction with biomass ash components. This change results mainly in the formation of Ca-rich layers on the bed particles. In this paper, a mechanism for layer formation is proposed and compared to the better understood mechanism for layer formation on quartz bed particles. Olivine bed material was sampled at an industrial-scale power plant before the start of operation and at predefined times after the operation had commenced. Therefore, time-dependent layer formation under industrial-scale conditions could be investigated. The proposed mechanism suggests that the interaction between wood biomass ash and olivine bed particles is based on a solid-solid substitution reaction, where Ca2+ is incorporated into the crystal structure. As a consequence, Fe2+/3+ and Mg2+ ions are expelled as oxides. This substitution results in the formation of cracks in the particle layer due to a volume expansion in the crystal structure once Ca2+ is incorporated. The results of this work are compared to relevant published results, including those related to quartz bed particles
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Keyword
- Energy Engineering
- Energiteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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