Elastic and Relaxation Properties of Larch Wood and Their Role in Production of Wood and Charcoal Briquettes
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2020, Vol 9, Issue 1
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.
Authors and Affiliations
A. A. Pekarets, O. A. Erokhina, V. V. Novozhilov, Yu. G. Mandre, E. L. Akim
Seed Regeneration of Buxus colchica Pojark. under the Conditions of Epiphytotics of Boxwood Forests
In response to expansion of Cydalima perspectalis Walker, 1859, mass scale drying of Buxus colchica Pojark. resulted in succession of forest communities of the Western Caucasus in 2014–2017. Changes in illumination of th...
Ecological-Cenotic Structure of the Relict Japanese Pine (Pinus × funebris Kom.) Grove in the Primorski Territory
The condition and ecological-cenotic (parcel) structure of a grove formed by the Japanese pine (Pinus × funebris Kom.) in the Primorski Territory (Ussuri District) are described. Such groves are the residual fragments of...
Bioenergetic and Reproductive Plantations of True Poplar Species in the Central Black Earth Region of Russia
The need to use fast-growing tree for bioenergy production was noted in the international and domestic press in the second half of the 20th century. In the first twenty years of the current century in a number of countri...
Producing Planting Material of Rubus arcticus L. by Clonal Micropropagation
The article presents the results of experimental studies on various propagation methods of the Arctic bramble in the Kostroma region. Industrial cultivation of forest berry plantations is a possible effective solution to...
Assessment of the Transformation of Forests in the Southern Urals Based on Multi-Temporal Satellite Images
The transformation of forests in the Southern Urals over a 25-year period has been studied using geoinformation systems and remote sensing methods. The Normalized Difference Vegetation Index (NDVI) has been determined, w...