Fir powder subcritical water liquefaction method and biomass oil thereof

Abstract

The invention belongs to the technical field of biomass liquefaction, and discloses a fir powder subcritical water liquefaction method and a biomass oil thereof. By using Chinese fir powder as a raw material, subcritical water as a reaction medium and an ionic liquid as a reaction catalyst, catalytic liquefying is performed in a high-pressure reaction kettle to prepare the biomass oil, optimal values of four factors including reaction temperature, reaction time, catalyst dosage and liquid-solid mass ratio which influence the liquefaction rate of the fir powder are obtained, an infrared spectrometer is adopted to analyze surface functional groups of the raw material, liquefaction residues and the fir powder biomass oil, and a gas chromatograph-mass spectrometer is adopted to analyze the chemical composition of the fir powder biomass oil. Subcritical water and the ionic liquid are organically combined to replace traditional wood liquefying agents such as phenols, polyols and liquid acid/alkali to be used in the wood liquefying process. By analyzing the liquefaction mechanism, the synergistic catalytic effect of the liquefying agent and the regulation and control mechanism of liquefaction product distribution, the scientific significance of the method is obvious, and meanwhile, the method has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of biomass liquefaction, and in particular relates to a fir powder subcritical water liquefaction method and biomass oil thereof. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Biomass such as wood is a renewable carbon resource that can be converted into solid, liquid, and gaseous fuels and chemicals. It has the characteristics of abundant reserves, carbon sequestration, less energy consumption for processing, less environmental pollution, and can be naturally degraded and recycled. The comprehensive development and utilization of wood and other biomass resources has become a key development area of ​​the country. Scholars at home and abroad have done a lot of research on the liquefaction of wood and other biomass, mainly in two aspects. Firstly, under high temperature and high pressure, the pyrolysis liquefaction of biomass requ...

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Problems solved by technology

[0005] Existing biomass liquefaction methods involve high temperature and high pressure, highly toxic and volatile or

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