A kind of catalytic hydrogenation saturation method of rich phenolic bio-oil fraction

Abstract

The invention discloses a catalytic hydrogenation saturation method for phenol-rich biological oil fractions. The method comprises the steps that the biological oil fractions and fatty alcohols are mixed to obtain a reaction raw material, the reaction raw material is atomized through preheating, and then passes through a stationary bed reactor filled with a SiO2-loaded Pt-Ni bimetallic catalyst, H2 is also introduced into the reaction raw material, a hydrogenation reaction is carried out, the reaction temperature is 240-330 DEG C, the reaction pressure is 1-6 MPa, and a liquid product is prepared. The overall conversion rate of phenol catalytic hydrogenation saturation can reach 92%, the yield of the liquid product is close to 90.0 wt%, and the overall selectivity of cyclitol and cycloalkane products in the liquid product can reach 97%. The catalytic hydrogenation saturation method for the phenol-rich biological oil fractions solves the problem that phenols are difficult to convert orhave strict conversion conditions in a traditional hydrogenation process through the prepared bimetallic catalyst by taking more difficultly converted phenol-rich biological oil as an object, and improves the activity and stability of subsequent cracking of the biological oil.

Description

technical field

[0001] The invention relates to the field of bio-oil upgrading and modification, in particular to a method for catalytic hydrogenation and saturation of phenol-rich bio-oil fractions. Background technique

[0002] my country is rich in biomass resources. If biomass can be efficiently converted into liquid fuel, it will help solve many problems in my country's energy, environment and agriculture. Biomass fast pyrolysis can convert biomass feedstock into liquid fuel bio-oil. However, crude bio-oil has poor quality, high water and oxygen content, low calorific value and strong corrosion, so its high-grade utilization is limited.

[0003] Catalytic cracking is a commonly used bio-oil modification technology, which can convert oxygenates in bio-oil into aromatic hydrocarbons. However, the composition of bio-oil is extremely complex, and the macromolecular phenolic polymers and sugars in it are very easy to cause carbon deposition and deactivation of the catalyst...