Modeling of the devolatilization kinetics during pyrolysis of grape residues.
Thermo-gravimetric analysis (TGA) was performed on grape seeds, skins, stalks, marc, vine-branches, grape seed oil and grape seeds depleted of their oil. The TGA data was modeled through Gaussian, logistic and Miura-Maki distributed activation energy models (DAEMs) and a simpler two-parameter model. All DAEMs allowed an accurate prediction of the TGA data; however, the Miura-Maki model could not account for the complete range of conversion for some substrates, while the Gaussian and logistic DAEMs suffered from the interrelation between the pre-exponential factor k0 and the mean activation energy E0--an obstacle that can be overcome by fixing the value of k0 a priori. The results confirmed the capabilities of DAEMs but also highlighted some drawbacks in their application to certain thermodegradation experimental data.
Department of Civil and Environmental Engineering, Trento University, Via Mesiano 77, 38123 Trento (TN), Italy. luca.fiori@ing.unitn.it
Luca
L
Fiori
Michele
M
Valbusa
Denis
D
Lorenzi
Luca
L
Fambri
D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D007700:Kinetics; D016015:Logistic Models; D008956:Models, Chemical; D013696:Temperature; D013818:Thermogravimetry; D027843:Vitis / Q000737:chemistry*; D014835:Volatilization; D014866:Waste Products / Q000032:analysis*
D014866:Waste Products