Study on catalytic pyrolysis mechanism of seaweed polysaccharide monomer

In this study, L -rhamnose monohydrate (LRM) was used as a model compound of seaweed polysaccharide to study its pyrolysis and catalytic pyrolysis mechanism . Initially, the weight loss curve of LRM was obtained by thermogravimetric analysis. The main weight loss temperature was found to be at 350–550 °C. Then, the pyrolysis mechanism of LRM was analyzed and verified by macroscopic experiments and molecular simulations. Experiments showed that the bio-oil yield was highest when the temperature reached around 500 °C, and the bio-oil contained large amount of furan substances. Finally, the effects of different proportions of catalysts (Mg–Ce/ZSM-5) on bio-oil products were studied, and the catalytic reaction mechanism was discussed.