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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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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High temperature pretreatment of lignocellulosic feedstock using a pyrolyzer

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

Embodiment 1

[0020] Set the temperature of the pyrolyzer to 200°C, and feed the hot carrier gas with oxygen-deficient combustible gas under normal pressure. The treated corn stalks (moisture content 8.7%, volatile solids 76.45%, cellulose 34.31%, semi-fiber 26.82% lignin, 16.18% lignin, particle size 0.1-1mm) into the material box, the raw material enters the reactor through an adjustable speed feeder, and the residence time of the raw material 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 material is heated rapidly, it enters the separator, and the processed raw material is separated through the separator and collected into the material box. Then, the treated corn stalks were measured with Italian WELP FIWE6 cellulose measuring instrument, referring to the Paradigm Washing Fiber Method, for the determination of cellulose, hemicellulose and lignin. The measurement results showe...

Embodiment 2

[0022] Set the temperature of the pyrolyzer to 200°C, and feed the hot carrier gas with oxygen-deficient combustible gas under normal pressure. The treated corn stalks (moisture content 8.7%, volatile solids 76.45%, cellulose 34.31%, semi-fiber 26.82% lignin, 16.18% lignin, particle size 0.1-1mm) into the material box, the raw material enters the reactor through an adjustable speed feeder, and the residence time of the raw material 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 material is heated rapidly, it enters the separator, and the processed raw material is separated through the separator and collected into the material box. Then 118g of corn stalks pretreated by pyrolysis were taken for anaerobic fermentation test. The test adopts liquid fermentation, the concentration of fermentation feed liquid is 8.5%, the concentration of inoculum is 30%, and the organic ...

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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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