Catalytic pyrolysis of woody oil over SiC foam-MCM41 catalyst for aromatic-rich bio-oil production in a dual microwave system

The homogeneous internal heating of solid catalyst during high-temperature conversion reactions is beneficial for reducing of coke formation. However, the non-uniform temperature heating of traditional catalytic reforming process hindered the development. Herein, a dual microwave reaction system with upgrading heating method was built to conduct the catalytic pyrolysis of woody oil over a SiC-MCM41 catalyst. The effects of pyrolysis temperature, catalytic temperature and catalyst to feed ratio were investigated. The pyrolysis behaviors of the four major fatty acids in materials were discussed under optimal reaction conditions with different catalysts. Experimental results showed that microwave catalysis reduced the coke formation and extended the service life of the catalyst and increased the hydrocarbon content to 94.833 wt% (71.409 wt% of aromatics) which may implicate the industrial production. The types of fatty acids have a greater impact on the pyrolysis products than the catalysts, among which the maximum amount of aromatics obtained from the pyrolysis of linolenic acid was 92.43 wt%. This finding provides a partial reference in commercial application for obtaining a high content of target products in the field of single oil pyrolysis in the future.