Characteristic analysis of bio-oil from penicillin fermentation residue by catalytic pyrolysis

The hazardous waste penicillin fermentation residue (PR) is a huge hazard to the environment. The bio-oil produced by the pyrolysis of the penicillin fermentation residue has the potential to become a biofuel in the future. This paper studied the pyrolysis characteristics of PR at 400 degrees C similar to 700 degrees C. According to the weight loss and weight loss rate of PR, the whole process of pyrolysis can be divided into three stages for analysis: dehydration and volatilization, initial pyrolysis, and pyrolytic char formation. The experimental results showed that the yield of the liquid phase is the highest (33.11%) at 600 degrees C. GC-MS analysis results showed that high temperature is beneficial to reduce the generation of oxygenated hydrocarbons (73%similar to 31%) and the yield of nitrogenous compounds gradually increased (19%similar to 43%); the yield of hydrocarbons was low in 400 degrees C similar to 600 degrees C pyrolysis (2%similar to 5%) but significantly increased around 700 degrees C (22%). In the temperature range of 400 degrees C to 700 degrees C, the proportion of C5-C13 in bio-oil gradually increased (26%-64%), and the proportion of C14-C22 gradually decreased (47%-16%). The catalyst can increase the proportion of hydrocarbons in the bio-oil component. And the Fe2O3/HZSM-5 mixed catalyst has a significant reduction effect on oxygen-containing hydrocarbons and nitrogen-containing compounds.