Abstract
Torrefication is a process of low-temperature pyrolysis of wood, used to improve the properties of wood fuel. Torrefied fuel has several advantages compared to the original. Thermal degradation causes changes in mass and composition of wood with increase in carbon percentage, which leads to an increase of combustion value Q. Thermal destruction can be viewed as a multistage process. The degree of decomposition of the material depends on temperature, time of exposure to heat and kinetic parameters of each stage of the process. The article presents the results of experimental studies of combustion value of torrefied woody biomass and its dependence on the degree of thermal decomposition. For experimental studies experimental setup was designed and manufactured. Experimental checking of the installation was carried out. The test showed that accuracy of determining combustion value is not more than 2 %. For experimental studies of the dependence of combustion value on the degree of thermal degradation, samples of wood were prepared in its unsaturated decomposition. Heat treatment of samples was carried out in inert gas environment of helium. Values of heat combustion of wood fuel with varying degrees of thermal destruction are obtained. Model of the dependence of calorific value from relative mass of wood fuel ω is proposed. The mathematical model allowing to determine the relative mass of wood as a function of temperature and time is represented. Dependence of combustion value on degree of thermal decomposition of wood is obtained in explicit form.
Highlights
Торрефикация – это процесс низкотемпературного пиролиза древесины, используемый для улучшения свойств древесного топлива
Absrtact Torrefication is a process of low-temperature pyrolysis of wood, used to improve the properties of wood fuel
The degree of decomposition of the material depends on temperature, time of exposure to heat and kinetic parameters of each stage of the process
Summary
Это процесс низкотемпературного пиролиза древесных материалов, используемых для производства топливных пеллет. Тепловая обработка проводится для улучшения свойств получаемого биотоплива. Термическая деструкция приводит к изменению элементного состава материала. Величина изменений зависит от режимов термообработки – температуры и времени воздействия [1, 2, 5, 8, 9, 10, 11, 12]. 2 приведены данные по свойствам древесины ивы до модифицирования и после модифицирования при разных температурах и разной длительности нагрева [3]. Древесина является природным полимерным материалом сложного состава. Эти компоненты разлагаются в разных диапазонах температур, что обуславливает многостадийный характер термической деструкции древесного материала [1, 4, 6, 7]. Стадии процесса термической деструкции можно рассматривать как параллельные, независимые реакции.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
