Processing of Renewable Wood Biomass into Thermally Modified Pellets with Increased Combustion Value
The article deals with the problems of creating new types of fuels based on the processing of renewable forest bioresources and ways of processing wood materials into gaseous, liquid and solid fuels. Solid biofuel, in the form of pellets, is becoming widely used, its production is expanding annually, and that is why much attention is paid to increasing the quality of this type of fuel. KNRTU is conducting research on the integrated processing of wood biomass into liquid and solid fuels. A flow chart of integrated processing of wood biomass into liquid and solid fuels is presented. The authors considered an installation for the production of thermally modified pellets with high heat of combustion. The results of mathematical and physical modelling of thermal modification of pellets obtained by adding lignin are presented. The kinetic curves for the decrease in the specific mass of wood pellets under different temperature conditions, the dependence of the non-condensable gas composition on temperature, the dependence of the heat of combustion of wood pellets on the temperature of the thermal modification process and the concentration of lignin, and the dependence of the hardness of pellets on the initial concentration of lignin are presented. The technology for the production of solid biofuels—thermally modified pellets consisting of shredded wood and lignin—has been developed.
KeywordsWood biomass Wood waste Cellulosic ethanol Combustion gases Liquid fuels Solid fuels
The presented results were obtained within the framework of the state task “Initiative scientific projects” on the theme No. 13.5443.2017/BC “Modification of the physical and chemical properties of wood biomass affecting the performance characteristics of the materials being created”.
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