The strong variation of the effective activation energies with the degree of conversion for both the pyrolysis and combustion of tobacco waste, as shown in Fig. 7, indicates that A 331440 both the pyrolysis and combustion processes are complex multi-step processes involving many reactions with various reaction mechanisms and activation energies. This conclusion is consistent with the analytical results of the DTG curves in the above section. Moreover, in general, the effective activation energies of the combustion process are lower than that of the pyrolysis processes, especially in the conversion range of α > 0.56, which indicates that chromatin is more difficult to occur for the pyrolysis process than the combustion process from a viewpoint of reactivity.
Fig. 8. Relationship between effective activation energy, conversion and temperature for the pyrolysis and combustion of tobacco waste.Figure optionsDownload full-size imageDownload as PowerPoint slide