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Method for directional thermal degradation of fiber biomass

A technology of thermal degradation and biomass, applied in the direction of organic chemistry, etc., can solve the problems of poor product stability and complex components of thermal degradation products, so as to increase the dosage, increase the content of furfural and levoglucose, and reduce the content of levoglucose Effect

Inactive Publication Date: 2010-07-28
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of complex components and poor product stability of existing thermal degradation products, the present invention provides a method for directional thermal degradation of fibrous biomass. Under cracking conditions, the liquid products mainly composed of furfural, levoglucose and levoglucose can be obtained

Method used

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  • Method for directional thermal degradation of fiber biomass
  • Method for directional thermal degradation of fiber biomass
  • Method for directional thermal degradation of fiber biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Grind the bamboo biomass raw material to 0.05-0.2 mm, add 3.0 g of bamboo powder and 150 ml of phosphoric acid solution with a mass concentration of 5.0% in a single-necked flask equipped with a condenser, heat and reflux for 1 h, filter and use hot Wash three times with deionized water and dry in an oven at 100 °C. The pretreated bamboo powder is quickly put into the fixed bed cracking reaction furnace which has reached 500°C, and the liquid product is collected through a cold trap. Analysis results of the liquid product: furfural content was 23.0%, levoglucose content was 45.20%, and levoglucosan content was 4.08%.

Embodiment 2

[0030] Grind the bamboo biomass raw material to 0.05-0.2 mm, add 3.0 g of bamboo powder and 150 ml of phosphoric acid solution with a mass concentration of 2.5% in a single-necked flask equipped with a condenser, heat and reflux for 1 h, filter and use hot Wash three times with deionized water and dry in an oven at 100 °C. The pretreated bamboo powder is quickly put into the fixed bed cracking reaction furnace which has reached 500°C, and the liquid product is collected through a cold trap. Analysis results of the liquid product: the content of furfural was 18.3%, the content of levoglucose was 38.7%, and the content of levoglucose was 13.0%.

Embodiment 3

[0032] Grind the bamboo biomass raw material to 0.05-0.2 mm, add 3.0 g of bamboo powder and 150 ml of phosphoric acid solution with a mass concentration of 1.0% in a single-necked flask equipped with a condenser tube, heat and reflux for pretreatment for 1 hour, filter and use a hot Wash three times with deionized water and dry in an oven at 100 °C. The pretreated bamboo powder is quickly put into the fixed bed cracking reaction furnace which has reached 500°C, and the liquid product is collected through a cold trap. Analysis results of the liquid product: furfural content was 13.8%, levoglucose content was 29.5%, and levoglucose content was 13.6%.

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Abstract

The invention discloses a method for directional thermal degradation of a fiber biomass, which comprises the following steps: crushing a fiber biomass, adding a directional thermal degradation catalyst with a certain concentration for pretreatment, mixing, filtering, washing with deionized water, drying at the temperature of 80-120 DEG C, and rapidly cracking at the temperature of 250-600 DEG C, thereby obtaining liquid products which mainly comprise furfural, L-glucosene, L-glucan and the like. The method for directional thermal degradation of the fiber biomass greatly reduces the types of the liquid products and facilitates the high-value use of the liquid products.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, and relates to a method for directional thermal degradation of fibrous biomass. Background technique [0002] Biomass resources are the only renewable resources that can be converted directly into liquid fuels and chemicals. Process technologies for converting biomass into liquid fuels and chemicals are mainly focused on bioconversion and thermochemical conversion. In thermochemical conversion, pyrolysis technology has attracted widespread attention. It can be converted into solid, liquid and gas products by optimizing process conditions, especially liquid bio-oil products, which are mainly used as fuel for direct application or upgraded to produce refined fuel or chemicals. [0003] Cellulosic biomass is the largest biomass resource on earth, mainly composed of cellulose, hemicellulose and lignin, and its pyrolysis behavior can be attributed to the pyrolysis of these three main component...

Claims

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Application Information

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IPC IPC(8): C07D307/50C07D309/30C08B37/02
Inventor 刘军利蒋剑春黄海涛
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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