Method for pretreating lignocellulose raw material by pyrolysis

A lignocellulose and pretreatment technology, which is applied in the fields of biomass pretreatment, biomass post-treatment, biochemical equipment and methods, etc., to achieve the effects of short time consumption, improved conversion rate and high efficiency

Inactive Publication Date: 2013-09-25
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

High temperature pretreatment of ligno

Method used

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  • Method for pretreating lignocellulose raw material by pyrolysis
  • Method for pretreating lignocellulose raw material by pyrolysis
  • Method for pretreating lignocellulose raw material by pyrolysis

Examples

Experimental program
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Effect test

Example Embodiment

[0019] Example 1

[0020] Set the temperature of the pyrolyzer to 200℃, and pass in the hot carrier gas oxygen-deficient combustible gas under normal pressure, and the processed corn stalks (water content 8.7%, volatile solids 76.45%, cellulose 34.31%, semi-fiber 26.82% of lignin, 16.18% of lignin, 0.1-1mm particle size) are added to the feed box, the raw materials enter the reactor through the adjustable-speed feeder, and the residence time of the raw materials in the reactor is 1s. The temperature in the reactor is measured by a thermocouple, and the temperature control device monitors it in real time. After the raw materials are rapidly heated, they enter the separator, and the processed raw materials are separated through the separator and collected in the material box. Then, the processed corn stalks were measured using the Italian WELP FIWE6 cellulose analyzer and the paradigm washing fiber method to determine cellulose, hemicellulose and lignin. The results of the deter...

Example Embodiment

[0021] Example 2

[0022] Set the temperature of the pyrolyzer to 200℃, and pass in the hot carrier gas oxygen-deficient combustible gas under normal pressure, and the processed corn stalks (water content 8.7%, volatile solids 76.45%, cellulose 34.31%, semi-fiber 26.82% of lignin, 16.18% of lignin, 0.1-1mm particle size) are added to the feed box, the raw materials enter the reactor through the adjustable-speed feeder, and the residence time of the raw materials in the reactor is 1s. The temperature in the reactor is measured by a thermocouple, and the temperature control device monitors it in real time. After the raw materials are rapidly heated, they enter the separator, and the processed raw materials are separated through the separator and collected in the material box. Then take 118g of corn stover pretreated by pyrolysis for anaerobic fermentation test. The test adopts liquid fermentation, the concentration of fermentation material is 8.5%, the concentration of inoculum...

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Abstract

The invention relates to a novel method for pretreating a lignocellulose raw material, wherein the method pretreats the lignocellulose raw material by pyrolysis with a pyrolyzer. Pretreatment temperature is 170-260 DEG C; operation pressure is normal pressure; reaction detention time is 0.5-2s; and material treating particle sizes are 0.1-5mm. The invention can effectively destroy a wax structure on the raw material surface and an internal lignocellulose structure, raises a conversion rate of cellulose and hemicellulose during anaerobic fermentation, shortens digestion time, and raises methane output.

Description

technical field [0001] The invention relates to a lignocellulosic raw material pretreatment method, and the method specifically relates to a method for pretreating lignocellulose raw material by using pyrolysis technology to improve the conversion efficiency of cellulose and hemicellulose in raw material anaerobic digestion. Background technique [0002] Natural lignocellulose raw material is a kind of renewable energy material formed by green plants through photosynthesis. It is mainly composed of cellulose, hemicellulose and lignin intertwined and has a complex structure. This complex structure has a great restrictive effect on the degradation of lignocellulosic raw materials, and has become a major bottleneck for its anaerobic fermentation to produce biogas. Therefore, it is necessary to pretreat lignocellulosic raw materials to break the compact structure of lignin and the crystal structure of cellulose, so as to improve the enzymatic hydrolysis efficiency and the conve...

Claims

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Application Information

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IPC IPC(8): C12P5/02C12M1/00
CPCY02E50/30
Inventor 易维明王芳牛卫生张德俐
Owner SHANDONG UNIV OF TECH
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