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EFFECT OF RAW MATERIAL COMPOSITION ON PELLETS PHYSICAL PROPERTIES
Abstract
This manuscript concentrates on the relationship between pellets quality, which is represented by the pellets physical properties, and the input composition of raw material. The main aim of this study is to determine the relationship between the raw material composition, which influences the pellets quality and the pellets quality indicators - physical properties of pellets. During the biomass densification also the raw material properties significantly influences the final solid biofuels quality. Therefore the raw material composition represented by two basic raw material mixtures (spruce sawdust/straw and spruce sawdust/bark) each on three levels of ratios (95/5; 90/10 and 80/20) were investigated. Effect of mentioned raw material mixtures on pellets bulk density, mechanical durability, abrasion, particle density and hardness was determined. Research findings presented in this paper are based on a realized experimental research which was done on Faculty of Mechanical Engineering STU in Bratislava. This experimental research was a logical result of and based on authors practical experience and wide theoretical analyses of selected variables influence. Described experimental research was realized by real pelleting machine which is a part of semi-production pelleting plant on Faculty of Mechanical Engineering STU in Bratislava.The experimental findings presented here are showing the importance of mentioned variables and parameters during the densification process.
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References15
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