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Using biomass as a source of energy has been gradually increasing in last decades, because it is a sustainable and CO2 neutral fuel. In order to improve the performance of gasifiers, academic and industrial researches need to gain insights into the highly complex processes during the combustion of biomass. Even though many research has been already done in this field, the detailed mechanisms during...
Due to an increasing environmental awareness renewable fuels such as biomass become an attractive source of energy because they offer a reduction of net production of carbon dioxide (CO 2 ) and better management of agricultural waste. However, thermal conversion of biomass leads to emission of undesirable secondary products, such as components of alkali, chlorine or sulphur, and may increase...
The objective of this contribution is to introduce a numerical approach that predicts pyrolysis of various biomasses under various boundary conditions such as particle geometry and heating rate. Hence, the approach is applicable to numerical tools that help exploiting further the potential of biomass as an energy resource. Furthermore, it is intended to represent the general trend of state of the...
A computer model describing the conversion of wood under packed-bed conditions is presented. The packed bed is considered to be an arrangement of a finite number of particles, typically sized between 5 and 25mm, with a void space left between them. Each particle is undergoing a thermal conversion process, which is described by a one-dimensional and transient model.Within the single-particle model,...
The objective of this paper is to derive analytically the conditions under which burning particles extinguish. Experiments indicate that the extinction may occur with a rapid drop in particle temperature, thus causing an insufficient burn-out. Both qualitative and quantitative description of this phenomenon is presented in this study. Based on Semenov's theory of thermal explosion, global heat release...
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