Slow Pyrolysis Mechanism and Kinetic Modeling of Scenedesmus Quadricauda Biomass

Abstract

S. quadricuda’s bioenergy potential was studied via pyrolysis by the use of thermodynamic and kinetic analysis. Mean energies of activation which were calculated using isoconversional techniques were 152.370(±20.93O) and 153.000 (±21.23O) and 174.980 (±22.38O) Kj/mol, utilizing Friedman& Vyazovkin’s advanced techniques and OFW technique. From joined analysis it was known that A1/4 reaction model of AvramiErofeev was most likely a single step reaction mechanism. But according to profile of activation energy there was complicated degradation in active pyrolysis zone, in this zone there were independent two parallel reactions. Fot the conversion at low temperature mean energy of activation was 77.950 (±3.12o) kJ/mol with 4.860E4 (±2.240E4) 1/s preexponential factor and n = 1.510 (±0.100), And high temperature 73.26 0(±17.93O) kJ/mol mean activation energy is recorded. Whereas pre-exponential factor was 1.320E03 (±2.610E3) s-1, and n=1.210 Feasibleness of conversion was indicated via thermodynamic analysis involving entropy, Gibbs free energy and enthalpy.