title: Isoconversional kinetic study of the thermal decomposition of sugarcane straw for thermal conversion processes.
abstract: The aim of this work was investigate the kinetics of the thermal decomposition reaction of sugarcane straw. The thermal decomposition experiments were conducted at four heating rates (1.25, 2.5, 5 and 10°C/min) in a thermogravimetric analyzer using nitrogen as inert atmosphere. The kinetic analysis was carried out applying the isoconversional method of Friedman, and the activation energies obtained varied from 154.1kJ/mol to 177.8kJ/mol. The reaction model was determined through master plots, corresponding to a two-dimensional diffusion. The pre-exponential factor of 1.82*10(9)s(-1) was determined by linearization of the conversion rate equation as a function of the inverse of absolute temperature, concerning to activation energy of 149.7kJ/mol, which are in the order of magnitude for biomass thermal decomposition reported in literature. Finally, the theoretical and experimental conversion data showed a very good agreement, indicating that these results could be used for future process modeling involving sugarcane straw.
authors.affiliation: School of Chemical Engineering, University of Campinas, 500 Albert Einstein Avenue, Cidade Universitária "Zeferino Vaz", 13083-852 Campinas, SP, Brazil.
authors.forename: Yesid Javier
authors.initials: YJ
authors.lastname: Rueda-Ordóñez
authors.affiliation: School of Chemical Engineering, University of Campinas, 500 Albert Einstein Avenue, Cidade Universitária "Zeferino Vaz", 13083-852 Campinas, SP, Brazil. Electronic address: katia@feq.unicamp.br.
authors.forename: Katia
authors.initials: K
authors.lastname: Tannous
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000737:chemistry; D007700:Kinetics; D008962:Models, Theoretical; D031786:Saccharum / Q000737:chemistry*; D013696:Temperature; D014835:Volatilization; D014866:Waste Products / Q000032:analysis*
chemical_list: D014866:Waste Products; D002244:Carbon
keywords: Activation energy; Biomass; Model free; Pyrolysis; Thermogravimetry