12
system [68]. Torrefaction is another approach to apply slow pyrolysis, operating
with mild temperatures (225–300 °C) to improve the biomass fuel properties and
the respective calorific value [69]. During torrefaction, surplus, volatiles and moisture are extracted from the biomass, while the main compounds (cellulose, hemicellulose and lignin) are partially degraded, originating the organic volatiles [70]. The
final material is solid called “torrefied” biomass, and it is easier to be stored and
transported due to the reduction of volume and weight, improving the energy density per unit volume [71]. Torrefied feedstock needs less power to be ground, and its
Fig. 5 Different kinds of pyrolysers. (Reproduced with permission from [59], Copyright © 2019,
Elsevier)
H. Jahangiri et al.
system [68]. Torrefaction is another approach to apply slow pyrolysis, operating
with mild temperatures (225–300 °C) to improve the biomass fuel properties and
the respective calorific value [69]. During torrefaction, surplus, volatiles and moisture are extracted from the biomass, while the main compounds (cellulose, hemicellulose and lignin) are partially degraded, originating the organic volatiles [70]. The
final material is solid called “torrefied” biomass, and it is easier to be stored and
transported due to the reduction of volume and weight, improving the energy density per unit volume [71]. Torrefied feedstock needs less power to be ground, and its
Fig. 5 Different kinds of pyrolysers. (Reproduced with permission from [59], Copyright © 2019,
Elsevier)
H. Jahangiri et al.