Study on thermochemical characteristics properties and pyrolysis kinetics of the mixtures of waste corn stalk and pyrolusite

Abstract As an alternative energy source for fossil energy, use of biomass pyrolysis to reduce pyrolusite is great significance conservation, emission reduction and environmental protection. Kinetics thermodynamics reducing using was studied thermogravimetric analysis analysis. Five non-isothermal methods, Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose, Distributed Activation Energy Model, Starink Friedman, were employed calculate the kinetics thermodynamic parameters. The results showed that by can be divided into four stages: drying stage (30–175 °C), rapid (175–350 °C), slow (350–680 °C) char formation (680–900 °C). apparent activation reaction enthalpy, Gibbs free entropy change calculated ranges from 170 180 kJ/mol, 164 174 kJ/mol, 136.97 137.25 kJ/mol 45.67 61.91 J/mol·K, respectively. This work provides theoretical basis practical guidance waste corn stalk.