METHOD FOR MODIFYING BIOMASS PYROLYSIS OIL

摘要

Provided is a method for modifying a biomass pyrolysis oil, which specifically comprises the following steps: a first step of demulsification, layering, and dehydration: adding an inorganic salt ion and an organic demulsifier into the biomass pyrolysis oil, wherein the mass ratio of the inorganic salt to the biomass pyrolysis oil is 1:2000-1:800, the mass ratio of the organic demulsifier to the biomass pyrolysis oil is 1:4000-1:1000, after mixing sufficiently, standing and taking the upper layer of biomass pyrolysis oil; a second step of performing a catalytic cracking modification on the biomass pyrolysis oil: using a modified catalyst: 1) modifying a catalyst: performing an ageing treatment on a carclazyte catalyst supported on a zeolite molecular sieve for 2-8 h with 100% water vapour under the condition of 500-800°C; and 2) placing the aged catalyst into a reactor, injecting the biomass pyrolysis oil into the reactor filled with the catalyst, with a catalyst-to-oil ratio of 1:3-16, and performing a catalytic cracking modification on the biomass pyrolysis oil under the conditions of a mass airspeed of 6-15 h -1 , a reaction temperature of 380-700°C and a reaction pressure of 0.1-0.8 Mpa.