Gasification of char from wood pellets and from wood chips: Textural properties and thermochemical conversion along a continuous fixed bed
In fixed bed gasifiers, the char bed gasification zone where char is converted into syngas plays a major role in terms of efficiency and control of the process. This zone is particularly complex as many phenomena compete, i.e. heterogeneous and homogeneous chemical reactions, gas flow in porous medium and flow of solid particles. This paper investigates the mechanical and thermochemical behavior of the char bed gasification zone and focuses particularly on bed compaction. To achieve this, a low-density biomass char from wood chips and a high-density one from wood pellets were gasified in a pilot scale continuous fixed bed reactor. Measurements of profiles were taken along the char bed for temperature, gas species concentration, char composition, char bed density and char particle velocity using fine instrumentation and specific char and gas sampling techniques. In our operating conditions, the char bed reactive zone is 3 times longer for chips (45 cm) than for pellets (16 cm). We show that pelletization has no effect on: char bed compaction, final char conversion (about 95%) and syngas quality (16% H2 and 13% CO). Finally, we discuss char bed compaction and the main phenomena that control it in order to propose a line of inquiry for modeling.
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Subjects: | K50 - Technologie des produits forestiers, P06 - Sources d'énergie renouvelable, Pinus pinaster, charbon de bois, gazéification, particule de bois, bois, biomasse, granule, http://aims.fao.org/aos/agrovoc/c_5904, http://aims.fao.org/aos/agrovoc/c_1503, http://aims.fao.org/aos/agrovoc/c_34000, http://aims.fao.org/aos/agrovoc/c_8423, http://aims.fao.org/aos/agrovoc/c_8421, http://aims.fao.org/aos/agrovoc/c_926, http://aims.fao.org/aos/agrovoc/c_3357, http://aims.fao.org/aos/agrovoc/c_3081, |
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dig-cirad-fr-5654072024-01-28T20:42:50Z http://agritrop.cirad.fr/565407/ http://agritrop.cirad.fr/565407/ Gasification of char from wood pellets and from wood chips: Textural properties and thermochemical conversion along a continuous fixed bed. Teixeira Gabriel, Van de Steene Laurent, Martin Eric, Gelix Franck, Salvador Sylvain. 2012. Fuel, 102 : 514-524.https://doi.org/10.1016/j.fuel.2012.05.039 <https://doi.org/10.1016/j.fuel.2012.05.039> Gasification of char from wood pellets and from wood chips: Textural properties and thermochemical conversion along a continuous fixed bed Teixeira, Gabriel Van de Steene, Laurent Martin, Eric Gelix, Franck Salvador, Sylvain eng 2012 Fuel K50 - Technologie des produits forestiers P06 - Sources d'énergie renouvelable Pinus pinaster charbon de bois gazéification particule de bois bois biomasse granule http://aims.fao.org/aos/agrovoc/c_5904 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_34000 http://aims.fao.org/aos/agrovoc/c_8423 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3357 France http://aims.fao.org/aos/agrovoc/c_3081 In fixed bed gasifiers, the char bed gasification zone where char is converted into syngas plays a major role in terms of efficiency and control of the process. This zone is particularly complex as many phenomena compete, i.e. heterogeneous and homogeneous chemical reactions, gas flow in porous medium and flow of solid particles. This paper investigates the mechanical and thermochemical behavior of the char bed gasification zone and focuses particularly on bed compaction. To achieve this, a low-density biomass char from wood chips and a high-density one from wood pellets were gasified in a pilot scale continuous fixed bed reactor. Measurements of profiles were taken along the char bed for temperature, gas species concentration, char composition, char bed density and char particle velocity using fine instrumentation and specific char and gas sampling techniques. In our operating conditions, the char bed reactive zone is 3 times longer for chips (45 cm) than for pellets (16 cm). We show that pelletization has no effect on: char bed compaction, final char conversion (about 95%) and syngas quality (16% H2 and 13% CO). Finally, we discuss char bed compaction and the main phenomena that control it in order to propose a line of inquiry for modeling. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/565407/1/document_565407.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.fuel.2012.05.039 10.1016/j.fuel.2012.05.039 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fuel.2012.05.039 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.fuel.2012.05.039 |
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K50 - Technologie des produits forestiers P06 - Sources d'énergie renouvelable Pinus pinaster charbon de bois gazéification particule de bois bois biomasse granule http://aims.fao.org/aos/agrovoc/c_5904 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_34000 http://aims.fao.org/aos/agrovoc/c_8423 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3357 http://aims.fao.org/aos/agrovoc/c_3081 K50 - Technologie des produits forestiers P06 - Sources d'énergie renouvelable Pinus pinaster charbon de bois gazéification particule de bois bois biomasse granule http://aims.fao.org/aos/agrovoc/c_5904 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_34000 http://aims.fao.org/aos/agrovoc/c_8423 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3357 http://aims.fao.org/aos/agrovoc/c_3081 |
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K50 - Technologie des produits forestiers P06 - Sources d'énergie renouvelable Pinus pinaster charbon de bois gazéification particule de bois bois biomasse granule http://aims.fao.org/aos/agrovoc/c_5904 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_34000 http://aims.fao.org/aos/agrovoc/c_8423 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3357 http://aims.fao.org/aos/agrovoc/c_3081 K50 - Technologie des produits forestiers P06 - Sources d'énergie renouvelable Pinus pinaster charbon de bois gazéification particule de bois bois biomasse granule http://aims.fao.org/aos/agrovoc/c_5904 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_34000 http://aims.fao.org/aos/agrovoc/c_8423 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3357 http://aims.fao.org/aos/agrovoc/c_3081 Teixeira, Gabriel Van de Steene, Laurent Martin, Eric Gelix, Franck Salvador, Sylvain Gasification of char from wood pellets and from wood chips: Textural properties and thermochemical conversion along a continuous fixed bed |
description |
In fixed bed gasifiers, the char bed gasification zone where char is converted into syngas plays a major role in terms of efficiency and control of the process. This zone is particularly complex as many phenomena compete, i.e. heterogeneous and homogeneous chemical reactions, gas flow in porous medium and flow of solid particles. This paper investigates the mechanical and thermochemical behavior of the char bed gasification zone and focuses particularly on bed compaction. To achieve this, a low-density biomass char from wood chips and a high-density one from wood pellets were gasified in a pilot scale continuous fixed bed reactor. Measurements of profiles were taken along the char bed for temperature, gas species concentration, char composition, char bed density and char particle velocity using fine instrumentation and specific char and gas sampling techniques. In our operating conditions, the char bed reactive zone is 3 times longer for chips (45 cm) than for pellets (16 cm). We show that pelletization has no effect on: char bed compaction, final char conversion (about 95%) and syngas quality (16% H2 and 13% CO). Finally, we discuss char bed compaction and the main phenomena that control it in order to propose a line of inquiry for modeling. |
format |
article |
topic_facet |
K50 - Technologie des produits forestiers P06 - Sources d'énergie renouvelable Pinus pinaster charbon de bois gazéification particule de bois bois biomasse granule http://aims.fao.org/aos/agrovoc/c_5904 http://aims.fao.org/aos/agrovoc/c_1503 http://aims.fao.org/aos/agrovoc/c_34000 http://aims.fao.org/aos/agrovoc/c_8423 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_3357 http://aims.fao.org/aos/agrovoc/c_3081 |
author |
Teixeira, Gabriel Van de Steene, Laurent Martin, Eric Gelix, Franck Salvador, Sylvain |
author_facet |
Teixeira, Gabriel Van de Steene, Laurent Martin, Eric Gelix, Franck Salvador, Sylvain |
author_sort |
Teixeira, Gabriel |
title |
Gasification of char from wood pellets and from wood chips: Textural properties and thermochemical conversion along a continuous fixed bed |
title_short |
Gasification of char from wood pellets and from wood chips: Textural properties and thermochemical conversion along a continuous fixed bed |
title_full |
Gasification of char from wood pellets and from wood chips: Textural properties and thermochemical conversion along a continuous fixed bed |
title_fullStr |
Gasification of char from wood pellets and from wood chips: Textural properties and thermochemical conversion along a continuous fixed bed |
title_full_unstemmed |
Gasification of char from wood pellets and from wood chips: Textural properties and thermochemical conversion along a continuous fixed bed |
title_sort |
gasification of char from wood pellets and from wood chips: textural properties and thermochemical conversion along a continuous fixed bed |
url |
http://agritrop.cirad.fr/565407/ http://agritrop.cirad.fr/565407/1/document_565407.pdf |
work_keys_str_mv |
AT teixeiragabriel gasificationofcharfromwoodpelletsandfromwoodchipstexturalpropertiesandthermochemicalconversionalongacontinuousfixedbed AT vandesteenelaurent gasificationofcharfromwoodpelletsandfromwoodchipstexturalpropertiesandthermochemicalconversionalongacontinuousfixedbed AT martineric gasificationofcharfromwoodpelletsandfromwoodchipstexturalpropertiesandthermochemicalconversionalongacontinuousfixedbed AT gelixfranck gasificationofcharfromwoodpelletsandfromwoodchipstexturalpropertiesandthermochemicalconversionalongacontinuousfixedbed AT salvadorsylvain gasificationofcharfromwoodpelletsandfromwoodchipstexturalpropertiesandthermochemicalconversionalongacontinuousfixedbed |
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