Sesame and broad bean plant residue: thermogravimetric investigation and devolatilization kinetics analysis during the decomposition in an inert atmosphere

Abstract

The plant residue of sesame and broad bean stalks and the capsule were thermally decomposed using thermogravimetric analysis under N2 at different heating rates. Two zones of devolatilization characterized the thermal decomposition process. The primary zone evolved about 90% of the released volatile matters and the reactivity of biomasses is very affected by the change of heating rate. Three kinetics approaches were used to analyze the devolatilization kinetics. The Coats and Redfern method was the best approach to estimate the kinetic parameters for these materials. The mass loss rate and conversion versus temperature were used to investigate the weakness of the DAEM and model-free methods for modeling the pyrolysis behavior under the severe changes among the different heating rates.