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Method for refining bio-oil

A bio-oil and catalyst technology, applied in the field of refined bio-oil, can solve the problems of complex structure, difficult depolymerization, poor thermal conductivity, etc., and achieve the effects of overcoming complex structure, improving depolymerization rate, and overcoming coking

Inactive Publication Date: 2014-09-24
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, although there are many detailed studies on the refining technology of bio-oil, each technology has many advantages, but due to the unique properties of bio-oil, these methods are only effective for model compounds or some components in bio-oil
In the prior art, bio-oil refining is usually carried out above 200°C. During the depolymerization process, lignin oligomers in bio-oil are easily carbonized and coked, producing a large amount of coke and tar-like compounds, which are deposited on the surface of the catalyst, covering the catalyst activity. sites, deactivating the catalyst, thereby reducing the depolymerization rate of the bio-oil
However, the above-mentioned lignin oligomers are not easy to depolymerize due to their complex structure and poor thermal conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Measure 1000g of bio-oil into a quartz vessel, and measure 0.1g of pre-prepared Pt-Ru / CdS-TiO with a particle size of 200 mesh 2 The catalyst is placed in a container containing bio-oil, and a stirring magnet is placed;

[0037] 2) Close the reaction system, turn on the electromagnetic stirring, turn on the advection pump, connect the air source and the cold well at the gas outlet of the reaction system, and the air passes through the containers filled with color-changing silica gel and activated carbon before entering the reaction kettle. Turn on and adjust the light source so that the light power in the reactor is 2000mw / cm 2 , adjust the gas flow rate so that the gas is evenly distributed in the reaction liquid;

[0038] 3) Adjust the flow rate of the light source and the cooling water in the interlayer of the reaction kettle, and at the same time turn on the heating device at the bottom of the quartz vessel to keep the temperature in the reaction system at 35°C,...

Embodiment 2

[0044] 1) Measure 1000g of bio-oil into a quartz vessel, and measure 0.1g of pre-prepared Pt-Ru / CdS-TiO with a particle size of 200 mesh 2 The catalyst is placed in a container containing bio-oil, and a stirring magnet is placed;

[0045] 2) Close the reaction system, turn on the electromagnetic stirring, turn on the advection pump, connect the air source and the cold well at the gas outlet of the reaction system, and the air passes through the containers filled with color-changing silica gel and activated carbon before entering the reaction kettle. Turn on and adjust the light source so that the light power in the reactor is 2000mw / cm 2 , adjust the gas flow rate so that the gas is evenly distributed in the reaction liquid;

[0046] 3) Adjust the flow rate of the light source and the cooling water in the interlayer of the reaction kettle, and at the same time turn on the heating device at the bottom of the quartz vessel to keep the temperature in the reaction system at 45°C,...

Embodiment 3

[0052] 1) Measure 1000g of bio-oil into a quartz vessel, and measure 0.5g of pre-prepared Pt-Ru / CdS-TiO with a particle size of 200 mesh 2 The catalyst is placed in a container containing bio-oil, and a stirring magnet is placed;

[0053] 2) Close the reaction system, turn on the electromagnetic stirring, turn on the advection pump, connect the air source and the cold well at the gas outlet of the reaction system, and the air passes through the containers filled with color-changing silica gel and activated carbon before entering the reaction kettle. Turn on and adjust the light source so that the light power in the reactor is 2000mw / cm 2 , adjust the gas flow rate so that the gas is evenly distributed in the reaction liquid;

[0054] 3) Adjust the flow rate of the light source and the cooling water in the interlayer of the reaction kettle, and at the same time turn on the heating device at the bottom of the quartz vessel to keep the temperature in the reaction system at 45°C,...

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Abstract

The invention provides a method for refining bio-oil. The method comprises a step that macro-molecular organic matters in the bio-oil are depolymerized in illumination conditions under the action of a visible light catalyst. By adopting the method provided in the invention, lignin oligomers in the bio-oil are activated under the catalytic action of the catalyst absorbing certain wavelength lights. The lignin oligomers excited through the photocatalysis have high energy, and high internal energy micro-molecular products are obtained to effectively overcome the complex structure characteristic of the oligomers, so the lignin oligomers in the bio-oil are decomposed into simple-structure micro-molecular organic matters, and the macro-molecular organic matters except the lignin oligomers in the bio-oil are activated and decomposed into simple-structure micro-molecules. The method which successfully depolymerizes the macro-molecular organic matters in the bio-oil into micro-molecular fuel components allows the generation of bio-oil coking to be overcome, the depolymerization rate of the bio-oil to be improved, and the high-grade bio-oil to be obtained.

Description

technical field [0001] The invention relates to the technical field of biomass energy conversion, in particular to a method for refining bio-oil. Background technique [0002] Biomass pyrolysis to produce bio-oil is one of the better technologies to solve the current energy and environmental crisis, especially to deal with the shortage of liquid fuel. Biomass pyrolysis liquefaction technology has developed rapidly since its advent in the 1980s. A variety of pyrolysis reactors have been researched and developed internationally, and some have entered the demonstration application stage. The industrial demonstration plant of pyrolysis and liquefaction has a bio-oil yield of more than 60wt%, and the oil is used for combustion to generate electricity. [0003] Since the mid-1990s when Shenyang Agricultural University first carried out research on biomass pyrolysis and liquefaction in China, this technology has made great progress. Successfully developed self-heating pyrolysis l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 李文志商丽敏张明建霍伟祖帅张腾飞
Owner UNIV OF SCI & TECH OF CHINA
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