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Method for producing fuel oil by biomass hydrothermal liquefaction

A technology for hydrothermal liquefaction and biomass raw material, which is applied in the field of biomass liquefaction to produce fuel oil and biomass hydrothermal liquefaction to produce fuel oil, can solve the problems of high oxygen content, low yield of liquefied oil, low calorific value, etc.

Inactive Publication Date: 2010-08-18
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above existing patents, liquefied oil products with better quality than fast pyrolysis have been obtained by optimizing process conditions and adding basic catalysts, but there are still incomplete biomass conversion (<95%), and the yield of liquefied oil is not high (<35%), high oxygen content (12-18%), and low calorific value (30-35MJ / kg), there is still a certain gap compared with the standard oil calorific value (41.8MJ / kg), It still needs to be further refined and processed before it can be used as a substitute for petroleum
In short, hydrothermal liquefaction technology has unique advantages in biomass conversion, but the current technical level still has certain defects, and further optimization of this technology is needed to promote the process of industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Add 2.0g of corn stalk powder and 10.0mL of water into a micro-vibration reactor with a volume of 30ml (Φ20×100mm), replace the air in the reactor with hydrogen after sealing, and maintain the initial pressure of hydrogen at 4.0MPa, Heated to 400°C in a sand bath within 5 minutes (at this point the system pressure rose to about 25.0 MPa), kept in this state for 35 minutes, quickly removed the heat source, and chilled the microreactor to room temperature with an ice-water bath. The product is separated to obtain fuel oil, the total conversion rate of organic matter is 96.3%, the fuel oil yield is 41.2%, the oxygen content is reduced to 11.4%, and the calorific value is 36.5MJ / kg.

Embodiment 2

[0028]Example 2: Add 2.0g of wheat stalk powder and 8.0mL of water into a micro-vibration reactor with a volume of 30ml (Φ20×100mm), seal it and replace the air in the reactor with carbon monoxide, and maintain the initial pressure at 4.0MPa for 5min The interior was heated to 390°C by a sand bath (at this time, the system pressure rose to about 23.0MPa), kept in this state for 30 minutes, and the heating source was quickly removed, and the microreactor was quenched to room temperature with an ice-water bath. The product is separated to obtain fuel oil, the total conversion rate of organic matter is 97.9%, the fuel oil yield is 42.7%, the oxygen content is reduced to 10.6%, and the calorific value is 37.2MJ / kg.

Embodiment 3

[0029] Example 3: Add 3.0g of wheat stalk powder and 14.0mL of water into a micro-vibration reactor with a volume of 30ml (Φ20×100mm), seal it and replace the air in the reactor with carbon monoxide, and maintain the initial pressure at 4.0MPa for 5min The interior was heated to 420°C by a sand bath (the system pressure rose to about 24.0MPa at this time), kept in this state for 25 minutes, and the heating source was quickly withdrawn, and the microreactor was quenched to room temperature with an ice-water bath. The product is separated to obtain fuel oil, the total conversion rate of organic matter is 98.5%, the fuel oil yield is 40.3%, the oxygen content is reduced to 11.8%, and the calorific value is 35.9MJ / kg.

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Abstract

The invention discloses a method for producing fuel oil by biomass hydrothermal liquefaction. The method is characterized by comprising the following steps: fully mixing a biomass raw material and solvent water (or adding catalyst water solution) to prepare seriflux, wherein a mass ratio of a catalyst to the raw material is 1:10 to 1:50, and the mass ratio of the raw material to water is 1:2 to 1:8; performing a reaction in a slurry bed reactor under a reducing atmosphere; controlling a liquefaction reaction temperature between 300 and 450 DEG C, a reaction pressure between 5 and 30 MPa and reaction time between 5 and 40 minutes; after the reaction, separating a product to obtain the fuel oil, solid residue, water, gas and the like. The method has the advantages of achieving complete biomass conversion, high oil product productivity, obtaining an oil product with a heat value equal to that of standard oil, relieving dependence on fossil energy, contributing to environment protection, lowering production cost and achieving good social and economic benefits.

Description

technical field [0001] The invention relates to a method for producing fuel oil by liquefying biomass, in particular to a method for producing fuel oil by hydrothermally liquefying biomass under a reducing atmosphere, and belongs to the field of energy conversion. Background technique [0002] Biomass is a renewable resource, and it is also a green energy that can achieve "zero emission" of carbon dioxide. In recent years, research on biomass utilization technology has become increasingly active in the world, especially in developed countries. my country is a large agricultural country with abundant biomass resources, but at present, traditional incineration is the main method, with low thermal efficiency, and most of them have not been rationally utilized. The development of biomass liquefaction technology can not only make up for the shortage of fossil energy in our country, but also benefit environmental protection. The current research on biomass liquefaction technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
Inventor 高晋生彭文才吴幼青吴诗勇伍超文
Owner EAST CHINA UNIV OF SCI & TECH
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