Effects of cellulose-lignin interaction on the evolution of biomass pyrolysis bio-oil heavy components

Cellulose, lignin and their mixture were pyrolyzed at 500-700 degrees C for 60 s and 90 s to investigate the influence of cellulose-lignin interaction on the evolution of biomass pyrolysis bio-oil heavy components with temperature and reaction time. Fourier transform-ion cyclotron resonance-mass spectrometry (FT-ICR-MS) and Fourier transform infrared spectroscopy (FT-IR) were used to characterize the composition and main functional groups of the heavy oil. Strong interaction among cellulose and lignin was revealed, which promoted the generation of lipids and unsaturated hydrocarbons while inhibiting the generation of the condensed aromatic hydrocarbons, phenolic species and sugars in the heavy components. With the use of van Krevelen diagrams, three reaction pathways are proposed to explain the evolution of heavy species under the influence of interaction, which is strongly affected by the removal of oxygen containing functional groups.

Automated summary

This study investigated the influence of cellulose-lignin interaction on the evolution of biomass pyrolysis bio-oil heavy components. The results showed that the interaction between cellulose and lignin promoted the generation of lipids and unsaturated hydrocarbons while inhibiting the generation of condensed aromatic hydrocarbons, phenolic species, and sugars.