Abstract:
In present study, the influence of chemical composition (cellulose hemicellulose and lignin) on pyrolysis and combustion behavior of several types of biomass was investigated. The relationship between chemical composition and residual fraction was determined using TGA technique. The results showed that each type of biomass samples contains different chemical compositions which have different molecular structure, resulting in different residual fraction value. Among these three components, hemicellulose is the easiest one to be pyrolyzed, while lignin is the most difficult one. Biomass with higher lignin content was observed to have slower pyrolysis rate. In addition, the pyrolysis was found to correspond to the lignin fraction based on the total amount of lignin and cellulose. This paper established a linear relation which can be used to evaluate the pyrolysis behavior of various types of biomass. Both lignin and hemicellulose used in the experiments could affect the pyrolysis characteristic of cellulose, while they did not show any interaction with each other. The combustion characteristics for actual biomass significantly depend on the char morphology.