Combustion behavior and kinetics of tackifying resin by TG-FTIR and DFT
analysis to assess the waste-to-energy potential
Abstract
The combustion behavior and kinetics of tackifying resins (such as
glycerol ester of colophony/hydrogenated colophony and C9/hydrogenated
C9 petroleum resin, namely GEC, GEHC, C9PR and HC9PR, respectively) were
investigated by TG-FTIR and density functional theory (DFT) analyses.
The calorific values of different resins are higher than that of
standard coal, indicating tackifying resins and their wastes are a
promising fuel for generating energy. The average activation energies
obtained by Friedman method for GEC, GEHC, C9PR and HC9PR were 223.51,
162.16, 166.52 and 116.20 kJ/mol, respectively, revealing that (H)C9PR
were more readily combustible than GE(H)C, and their hydrogenated
products burned more easily than their unhydrogenated ones, which were
strongly supported by the TG-FTIR results. DFT calculations also show
that the bond dissociation energy of C-C bond of GEC is higher than
those of C9PR and GEHC. The best appropriate reaction mechanism
evaluated by the master plots method is R3 model.