Changes in the heat of combustion of wood pellets depending on the degree of their torrefaction
pdf (Русский)

Keywords

calorific value
renewable hydrocarbon resources
wood pellet torrefaction

How to Cite

Geller Ю., & Khodyashov Е. (2021). Changes in the heat of combustion of wood pellets depending on the degree of their torrefaction. Industrial Processes and Technologies, 1(2), 81–90. https://doi.org/10.37816/2713-0789-2021-1-2-81-90

Abstract

To improve the physicochemical properties of wood pellets, for example, to increase the bulk density, increase the heat of combustion, reduce hygroscopicity, torrefaction is used — a process of slow heating (no more than 50 °C/min) of wood in an inert environment at temperatures up to 300 °C.

The paper compares the characteristics of torrefied and non-heat-treated wood pellets. The results of an experiment on the loss of mass of the sample, the release of volatiles, and the change in the temperature of the sample during the decomposition of a sample of woody biomass are presented. The experiment was carried out on a SDT Q600 thermal analyzer with the Universal Analisys 2000 software.

During the experiment, the pellets were first heated to 103 °C for 15 minutes, which was accompanied by the removal of moisture, then with heating to 800 ° C, thermal decomposition of the sample took place with the release of volatile organic substances. As a result of data processing, the values of the calorific value of untreated (≈19 MJ/kg) and (from 21 to 24 MJ/kg) torrefied pellets were obtained.

https://doi.org/10.37816/2713-0789-2021-1-2-81-90
pdf (Русский)