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Alkali enhanced bio...
Alkali enhanced biomass gasification with in situ S capture and novel syngas cleaning. Part 1 : Gasifier performance
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- Furusjö, Erik, 1972- (author)
- Luleå tekniska universitet,RISE,Bioraffinaderi och energi,IVL Swedish Environmental Institute, Sweden,Energivetenskap,IVL Swedish Environmental Research Institute, Climate & Sustainable Cities
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- Ma, Chunyan (author)
- Luleå tekniska universitet,Energivetenskap
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- Ji, Xiaoyan (author)
- Luleå tekniska universitet,Energivetenskap
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- Carvalho, Lara (author)
- Luleå tekniska universitet,Energivetenskap
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- Lundgren, Joakim (author)
- Luleå tekniska universitet,Energivetenskap
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- Wetterlund, Elisabeth, 1978- (author)
- Luleå tekniska universitet,Energivetenskap
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(creator_code:org_t)
- Elsevier Ltd, 2018
- 2018
- English.
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In: Energy. - : Elsevier Ltd. - 0360-5442 .- 1873-6785. ; 157, s. 96-105
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Previous research shows that alkali addition in entrained flow biomass gasification can increase char conversion and decrease tar and soot formation through catalysis. This paper investigates two other potential benefits of alkali addition: increased slag flowability and in situ sulfur capture. Thermodynamic equilibrium calculations show that addition of 2–8% alkali catalyst to biomass completely changes the chemical domain of the gasifier slag phase to an alkali carbonate melt with low viscosity. This can increase feedstock flexibility and improve the operability of an entrained flow biomass gasification process. The alkali carbonate melt also leads to up to 90% sulfur capture through the formation of alkali sulfides. The resulting reduced syngas sulfur content can potentially simplify gas cleaning required for catalytic biofuel production. Alkali catalyst recovery and recycling is a precondition for the economic feasibility of the proposed process and is effected through a wet quench. It is shown that the addition of Zn for sulfur precipitation in the alkali recovery loop enables the separation of S, Ca and Mg from the recycle. For high Si and Cl biomass feedstocks, an alternative separation technology for these elements may be required to avoid build-up.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Energisystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Energy Systems (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Keyword
- Alkali
- Biomass gasification
- Catalysis
- Entrained flow
- Slag
- Biomass
- Catalysts
- Feedstocks
- Precipitation (chemical)
- Recycling
- Slags
- Sulfur
- Sulfur compounds
- Synthesis gas
- Biofuel production
- Economic feasibilities
- Separation technologies
- Sulfur precipitation
- Thermodynamic equilibrium calculation
- Gasification
- alkalinity
- biofuel
- carbonate
- catalyst
- chemical alteration
- entrainment
- feasibility study
- gas
- performance assessment
- thermodynamics
- Energiteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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