A method for preparing seaweed raw material fuel oil by catalytic liquefaction method

Abstract

The invention belongs to the technical field of comprehensive utilization of algae, relates to a method for preparing high-quality fuel by using the algae material through a catalytic liquefying method, and particularly relates to a method for preparing the fuel by using a metal-modified molecular sieve catalyst to catalyze and liquefy the algae material. The method comprises the following steps of: crushing and sieving cleaned and dried algae, mixing the algae material with the metal-modified molecular sieve catalyst and water, then obtaining a mixture, putting the mixture into a reaction kettle, heating the reaction kettle, reacting under the oxygen-free condition, naturally cooling the mixture after the reaction of the mixture is finished, then carrying out normal-pressure distilling treatment on a solid-liquid product, collecting fractions at the temperature of 60-500 DEG C, separating water in the fractions and obtaining combustible fuel. The method has the advantages that the catalytic effect and the deoxygenating effect are ideal, the fuel yield is high, the oxygen content is low, the corrosion of the basic catalyst to equipment is avoided, the preparation process is simple, the principle is reliable, the materials are easily obtained, the quality of a product is good, the economic benefit and the social effect are obvious and the environmentally-friendly effect is good.

Description

Technical field: [0001] The invention belongs to the technical field of comprehensive utilization of seaweed, and relates to a method for preparing high-quality fuel oil by using seaweed raw materials through a catalytic liquefaction method, in particular to a method for preparing fuel oil by catalytically liquefying seaweed raw materials with a metal-modified molecular sieve catalyst. Background technique: [0002] At present, with the depletion of petrochemical energy and the intensification of the greenhouse effect, people are paying more and more attention to seeking alternative energy sources. Biomass, as a widely renewable clean energy source, has attracted more and more attention. Compared with seaweed, seaweed has the advantages of high photosynthetic efficiency, short growth cycle, and does not occupy land. Therefore, the development of biofuels based on seaweed has attracted increasing attention. At present, the thermochemical methods for preparing liquid fuels from...

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Problems solved by technology

[0002] At present, with the depletion of petrochemical energy and the intensification of the greenhouse effect, people are paying more and more attention to seeking alternative energy sources. Biomass, as a widely renewable clean energy source, has attracted more and more attention. Compared with seaweed, seaweed has the advantages of high photosynthetic efficiency, short growth cycle, and does not occupy land. Therefore, the development of biofuels based on seaweed has attracted increasing attention. At present, the thermochemical methods for preparing liquid fuels from seaweed are mainly hydrothermal liquefaction and thermal Solution method, although the raw materials do not need to be dried by hydrothermal liquefaction method, the separation process of reaction products is cumbersome. Although the pyrolysis method is simple in process and high in oil yield, the bio-oil produced has low calorific value and high acidity , poor stability and other shortcomings, it is difficult to use directly as a fuel; in the prior art, the introduction of a catalyst in the conversion process of seaweed can not only significantly improve the quality of bio-oil obtained from pyrolysis, but also reduce the reaction conditions and energy consumption

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