Thermokinetic and TG/DSC-FTIR study of pea waste biomass pyrolysis

Abstract

In this study agricultural waste biomass pea residue was investigated for its potential to be used in pyrolysis for production of bioenergy. Experiments were carried out in a TG/DSC-FTIR under an inert nitrogen medium at different heating rates. Kinetic parameters of pyrolysis were calculated using model free iso-conversional models. The determined activation energy and pre-exponential factor values were ranged between 184.4 and 311.8 kJ mol(-1) and 3.36E+16-1.23E+28, respectively. Thermodynamic parameters, such as change in enthalpy, Gibbs free energy and entropy were also calculated. DSC plots of samples showed that for all heating rates the reactions showed an exothermic behavior. Evolved gaseous species were investigated simultaneously during pyrolysis using a FTIR spectrometer coupled to TGA system. The change in profile of gaseous product release depending on temperature and heating rate was also studied. Considering kinetic and thermodynamic analysis besides proximate analysis, pea waste has potential for bioenergy production via pyrolysis.