Modification method of biomass pyrolysis oil

Abstract

The invention provides a modification method of biomass pyrolysis oil. The modification method of the biomass pyrolysis oil specifically comprises the following steps of: I, demulsification layering dehydration: adding an inorganic salt iron 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), mixing completely, standing and taking an upper-layer biomass pyrolysis oil; II, carrying out catalytic cracking modification on the biomass pyrolysis oil: using a modified catalyst: (1) modified catalyst: carrying out ageing treatment on a zeolite molecular sieve load carclazyte catalyst for 2-8 hours with 100% water vapor at 500-800 DEG C; placing the aged catalyst in a reactor, injecting the biomass pyrolysis oil in a reactor with the catalyst, wherein the agent-oil ratio is 1:(3-16), and carrying out biomass pyrolysis oil catalytic cracking modification at the mass airspeed of 6-15h<1>, the reaction temperature of 380-700 DEG C and the reaction pressure of 0.1Mpa-0.8Mpa.

Description

technical field [0001] The invention provides a method for modifying biomass pyrolysis oil. Specifically, it is the technology of direct catalytic cracking of biomass pyrolysis oil to produce fuel oil after dehydration. Background technique [0002] Fossil energy such as petroleum, coal, and natural gas is increasingly exhausted. Biomass energy is the fourth largest energy after petroleum, coal, and natural gas. It has the advantages of extensive sources, safety, renewable cycle, and zero carbon dioxide emissions. Biomass sources mainly include crops, trees, other plants and straw, etc. Biomass can produce different types of energy fuels through a series of conversion technologies, such as biomass carbonization can produce high-quality solid fuels, and biomass gasification can produce gaseous fuels , Biomass liquefaction can obtain liquid fuel, etc. Biomass directly converted to liquid fuel technology can convert low-quality, low-calorific-value biomass energy into high-q...

AI Technical Summary

Problems solved by technology

In these processes, it is very easy to make the biomass pyrolysis oil become more viscous or even agglomerate and deteriorate during heating and rectification

At the same time, because biomass pyrolysis oil contains more low boiling point components, the rectification process will cause the loss of these low boiling point components and some organic azeotropes

However, the equipment for catalytic hydrogenation is generally complex and costly, and reactor blockage and catalyst deactivation are prone to occur during the production process.

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