TG-GC-MS study of pyrolysis characteristics and kinetic analysis during different kinds of biomass

Abstract

In this paper, TG-GC-MS was used to study the pyrolysis characteristics and kinetic parameters of the atypical biomass such as traditional Chinese medicine residues, livestock and poultry wastes, fungus planting sticks, bagasse and the typical biomass such as bark. It was found that the activation energies of the five kinds of biomass were significantly different. The activation energies of the mixed kinds of traditional Chinese medicine residues and livestock and poultry waste were lower. The mixed biomasses could reduce the initial pyrolysis temperature and accelerate the pyrolysis speed. The water released in the whole process of the atypical biomasses mass loss process. There were two peaks of HR at ∼78 °C and ∼367 °C respectively. The second peak value is significantly higher than the first one, and the peak intensity is 2.44 times of woody biomasses. The peak intensities of non-condensible gas during the atypical biomass pyrolysis are CO + C2H4 > CO2 > H2 > CH4. The proportion of CO + C2H4 pyrolysised by HR is 39.45%, the H2 is 16.47%, and the CH4 is 5.17%.