All the kinetic parameters differ for the

Fig. 4 shows computed and experimental char gasification times using the fuel specific activation energies and the unified activation energies for the six investigated chars at 800, 900 and 1000 °C. There is a good general agreement between the unified model and the experimental data, implying that the unified activation ML347 can be used to predict the char conversions under the investigated conditions. It can be seen that the chars of the raw and torrefied pine are the least reactive, while the chars of the raw and torrefied straw are the most reactive.
Fig. 4. Computed and experimental char gasification times when 99% of the depth diversity gradient char has reacted for the six investigated chars at 800, 900 and 1000 °C with 13, 34 or 68 vol.% CO2.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 5. Computed and experimental char conversion versus time at 800, 900 and 1000 °C. Left: adsorption and desorption activation energies determined for olive stones char. Right: unified adsorption and desorption activation energies.Figure optionsDownload full-size imageDownload as PowerPoint slide