Influence of extractives on mechanism of biomass pyrolysis

Inert solvent was selected to extract corresponding extractives from different kinds of biomass. In this study, pyrolysis of the extractives on thermogravimetric analyzer coupled with Fourier transform infrared spectroscopy (TG-FTIR) was studied, and the influence of extractives on biomass pyrolysis was also discussed. The results indicate that extractives have distinct differences in composition and product distribution due to the different amount of guaiacyl and syringyl units in lignin component. Manchurian ash contains more methanol and methane caused by the decomposition of phenols at high temperature. Compared with raw biomass, extracted biomass has higher activation energy and release main products earlier; the yield of water, CO2, CO, and aldehydes increases, whereas the yield of acids and alkanes decrease.