Method for catalytic hydrogenation of furfural under supercritical carbon dioxide and catalyst preparation method

Abstract

The invention relates to the field of preparation of biologic oil, and provides a furfural catalytic hydrogenation method under supercritical carbon dioxide and a method for preparing catalysts. The furfural catalytic hydrogenation method under supercritical carbon dioxide comprises the steps that furfural and palladium and carbon catalysts are added to a reaction still, then the reaction still is sealed, hydrogen is introduced into the reaction still to remove the air in the reaction still, liquefied carbon dioxide is injected into the sealed reaction still through a plunger metering pump, the pressure of the carbon dioxide is made to be above the critical pressure when the carbon dioxide is in an overcritical state, furfural catalytic hydrogenation and upgrading are carried out under the overcritical condition of the carbon dioxide, and a needed liquid product is prepared. The method for preparing the palladium and carbon catalysts comprises the steps of pre-processing of a carrier and preparation of the palladium and carbon catalysts (Pd / C catalysts). In the reaction process, the catalysts have no carbon accumulation phenomenon, can be recycled, largely reduce generation of by-products, and improve the selectivity of the products.

Description

technical field [0001] The invention relates to the field of bio-oil preparation, in particular to a method for catalytic hydrogenation of furfural under supercritical carbon dioxide and a catalyst preparation method. Background technique [0002] In recent years, energy shortage and environmental degradation have gradually become two prominent problems restricting social development. Biomass has the advantages of being renewable, sustainable, and environmentally friendly. Bio-oil produced by pyrolysis of biomass has the potential to partially replace traditional fossil fuels. However, bio-oil has the characteristics of strong acidity, high water content, high oxygen content, etc., and is easy to condense, resulting in unstable properties. Therefore, bio-oil must be upgraded before use to enhance its quality. The use of catalytically upgraded bio-oil as vehicle fuel has become a hotspot of current research. [0003] Bio-oil has a complex composition and contains a variety...

AI Technical Summary

Problems solved by technology

According to the literature search, the application of carbon dioxide as a supercritical fluid to the catalytic hydrogenation of furfural under supercritical conditions has not been reported so far.