The study of hydrothermal liquefaction of corn straw with Nano ferrite plus inorganic base catalyst system at low temperature

Hydrothermal liquefaction of corn straw with different catalytic systems and temperatures were investigated in this study. Results showed dual catalytic system can effectively promote the degradation of corn straw at low temperature. With increase of temperature, aqueous phase increased and straw residue decreased for all catalytic systems. The heavy bio-oil yield increased with the increasing of temperature for single catalytic system, while the trend was opposite for dual catalytic system. In single catalytic system, ZnFe2O4 was more suitable for preparation of heavy bio-oil, and the maximum yield reached 34.02 wt% at 180 degrees C. The proportion of monophenyl compounds in heavy bio-oil for dual catalytic system reached the maximum of 84% at 220 degrees C with ZnFe2O4. At 180 degrees C, the contents of Benzofuran,2,3-dihydro and 2-Methoxy-4-vinylphenol reached the maximum of 31.42% and 17.64% in CoFe2O4 catalyst system, and the maximum yield of Vanillin was 10.82% with ZnFe2O4.

Automated summary

The study investigated the hydrothermal liquefaction of corn straw with different catalytic systems and temperatures. Results showed that a dual catalytic system can effectively promote the degradation of corn straw at low temperatures, but the yield of heavy bio-oil is affected by temperature. There are differences in the content and yield of different compounds in bio-oil under different catalytic systems and temperatures.