Kinetic modeling and gas composition analysis during sawdust pyrolysis

Abstract

This research paper deals about kinetic modeling and gas composition analysis of sawdust pyrolysis. The thermal degradation of sawdust at lower (10 °C/min), medium (20 °C/min) and higher (50 °C/min) heating rates were conducted using Beijing Henven Thermo Gravimetric (TG) analyzer. The sawdust pyrolysis gave 98% gas and 2% char, 80% gas and 20% char, and 70% gas and 30% char for lower, medium and higher heating rates. The Flynn-Wall Ozwa (FWO) model free method and the Arrhenius equation was used to estimate kinetic parameters and rate of this pyrolysis process. The rate equation was 93% fit with the medium heating pyrolysis data, which was better fit than the other heating rates. The Thermo Gravimetric analyzer and Jesco 6600 Fourier Transform Infrared (FTIR) analyzer were connected and the released gases at medium heating were investigated. Using TG-FTIR analysis carbon monoxide, carbon dioxide, water, hydrogen and char were released during pyrolysis of sawdust at medium heating rate.