ELASTIC AND RELAXATION PROPERTIES OF LARCH WOOD AND THEIR ROLE IN PRODUCTION OF WOOD AND CHARCOAL BRIQUETTES

Authors

  • А. А. Пекарец LLC Forest Technology Company
  • О. А. Ерохина Higher School of Technology and Energy of the Saint Petersburg State Technological University of Plant Polymers
  • В. В. Новожилов Higher School of Technology and Energy of the Saint Petersburg State Technological University of Plant Polymers
  • Ю. Г. Мандре Higher School of Technology and Energy of the Saint Petersburg State Technological University of Plant Polymers
  • Э. Л. Аким Higher School of Technology and Energy of the Saint Petersburg State Technological University of Plant Polymers

DOI:

https://doi.org/10.37482/0536-1036-2020-1-200-208

Keywords:

wood biorefining, larch wood, biofuel, wood briquettes, charcoalbriquettes, pellets, physical and mechanical properties, relaxation properties

Abstract

Processing of sawdust, which accounts for 10…12 % of the volume of processed raw wood materials in products with high added value, is one of the areas of woodbiorefining. This became a premise for sawdust processing into secondgeneration biofuel, as well as carbonized briquettes based on it. The relaxation properties of larch wood are studied and their role in the technological process carried out in creation of new generation biofuel with a given set of operational properties is analyzedtaking into account the specific features of relaxation transitions at the stages of obtaining wood and charcoal briquettes.The relationship between the directed change in the relaxation state of the wood polymer components (lignin, cellulose and hemicelluloses) and the operational parameters is considered. The experimental data findings confirm that cellulose and hemicelluloses are in a high-elastic state in the initial wood and sawdust.It is advisable to ensure that the wood polymer components are transferred below the brittle temperature, in other words, wood should be dried to the lowest possible residual moisture, in order to grind wood sawdust to a powdery state with minimum energy consumption. Subsequent steam humidification to a moisture content of 3…4 % gives the system extrusion ability due to the formation of hemicellulose gel layers on the surface.

For citation: Pekarets A.A., Erokhina O.A., Novozhilov V.V., Mandre Yu.G., Akim E.L. Elastic and Relaxation Properties of Larch Wood and Their Role in Production of Wood and Charcoal Briquettes. Lesnoy Zhurnal [Russian Forestry Journal], 2020, no. 1, pp. 200–208. DOI: 10.37482/0536-1036-2020-1-200-208

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Author Biographies

А. А. Пекарец, LLC Forest Technology Company

Postgraduate Student

О. А. Ерохина, Higher School of Technology and Energy of the Saint Petersburg State Technological University of Plant Polymers

Head of Laboratory

В. В. Новожилов, Higher School of Technology and Energy of the Saint Petersburg State Technological University of Plant Polymers

Master

Ю. Г. Мандре, Higher School of Technology and Energy of the Saint Petersburg State Technological University of Plant Polymers

Doctor of Engineering

Э. Л. Аким, Higher School of Technology and Energy of the Saint Petersburg State Technological University of Plant Polymers

Doctor of Engineering, Prof.

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Published

2020-02-26

How to Cite

Пекарец, А. А., О. А. Ерохина, В. В. Новожилов, Ю. Г. Мандре, and Э. Л. Аким. “ELASTIC AND RELAXATION PROPERTIES OF LARCH WOOD AND THEIR ROLE IN PRODUCTION OF WOOD AND CHARCOAL BRIQUETTES”. Lesnoy Zhurnal (Forestry Journal), no. 1, Feb. 2020, pp. 200-8, doi:10.37482/0536-1036-2020-1-200-208.

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BRIEF SUMMARIES AND EXPERIENCE EXCHANGE