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Comprehensive utilization method of lignocellulose biomass

A technology of lignocellulose and biomass, which is applied in the field of comprehensive utilization of cellulose, hemicellulose and lignin in lignocellulosic biomass, can solve the problems of high hemicellulose and cellulose extraction rate, and cannot be obtained at the same time. To achieve the effect of improving the extraction rate

Active Publication Date: 2013-04-17
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Description
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Problems solved by technology

[0008] For this reason, the technical problem to be solved by the present invention is to overcome the problem that the prior art cannot simultaneously obtain higher hemicellulose and cellulose extraction rates when comprehensively utilizing hemicellulose, lignin and cellulose, thus proposing a Comprehensive utilization method of lignocellulosic biomass

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  • Comprehensive utilization method of lignocellulose biomass

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Effect test

Embodiment 1

[0056] (1) Alkali solution to extract alkali lignin

[0057] 10.6kg of crushed corn cobs (mass composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.1%, lignin 23.7%, other 2.95%, the same below) were broken, washed with water to remove dust, and then hydrogenated Alkaline hydrolysis with sodium oxide solution, wherein the liquid-solid volume ratio is 5:1, the concentration of sodium hydroxide solution is 3%, the temperature is raised to 70°C, and after 1 hour of cooking alkaline hydrolysis, the alkali hydrolysis residue and alkali lignin solution are separated , clean the alkali lignin residue with 10kg of water, and the cleaning liquid is combined with the alkali lignin solution; finally obtain 23.77kg alkali lignin residue (about 65% moisture content) and 46.22kg alkali lignin solution; in the alkali lignin solution The content of alkali lignin is 2.46%, and the extraction rate of alkali lignin is 45%.

[0058] The extraction rate formula of alkali lignin is as f...

Embodiment 2

[0074] (1) Alkali solution to extract alkali lignin

[0075] 10.6 kg of pulverized corn cobs were broken, washed with water to remove dust, and then carried out alkaline hydrolysis with sodium hydroxide solution, wherein the liquid-solid volume ratio was 20:1, the concentration of sodium hydroxide solution was 0.8%, and the temperature was raised to 100 ° C. After 2 hours of cooking alkaline hydrolysis, the alkali hydrolysis residue and alkali lignin solution are separated, and the alkali hydrolysis residue is cleaned with 10 kg of water, and the cleaning solution is merged with the alkali lignin solution; finally, 23.61 kg alkali hydrolysis residue (moisture content) is obtained About 65%) and 19.63kg of alkali lignin solution; the content of alkali lignin in the alkali lignin solution is 0.55%, and the extraction rate of alkali lignin is 43%.

[0076] (2) acid hydrolysis

[0077] Get all the alkali hydrolysis residues obtained by the alkali solution treatment in the present...

Embodiment 3

[0085] (1) Alkali solution to extract alkali lignin

[0086] 10.6 kg of pulverized corn cobs were broken, washed with water to remove dust, and then carried out alkaline hydrolysis with sodium hydroxide solution, wherein the liquid-solid volume ratio was 10:1, the concentration of sodium hydroxide solution was 5%, and the temperature was raised to 40 ° C. After 6 hours of cooking alkaline hydrolysis, the alkali hydrolysis residue and alkali lignin solution are separated, and the alkali hydrolysis residue is cleaned with 10 kg of water, and the cleaning solution is merged with the alkali lignin solution; the final 24.44 kg alkali hydrolysis residue (moisture content 65 %) and 90.88kg of alkali lignin solution; the content of alkali lignin in the alkali lignin solution is 1.11%, and the extraction rate of alkali lignin is 40%.

[0087] (2) acid hydrolysis

[0088] Get all the alkali hydrolysis residues obtained by the alkali solution treatment in the present embodiment (1), the...

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Abstract

A comprehensive utilization method of lignocellulose biomass comprises the following steps: (a) processing the lignocellulose biomass by an alkaline solution to extract lignin; (b) performing acid hydrolysis of the alkaline hydrolysis residues obtained by the alkaline solution processing, separating to obtain a pentose solution and acid hydrolysis residues; (c) performing enzymatic hydrolysis of the alkaline hydrolysis residues by using cellulase produced by a penicillium (Penicillium decumbens PD-G3-08) to obtain a glucose solution and enzymatic hydrolysis residues; (d) returning the enzymatic hydrolysis residues to step (b) for acid hydrolysis processing, or combining the enzymatic hydrolysis residues with new alkaline hydrolysis residues and performing acid hydrolysis processing in step (b), then orderly performing steps (c) and (d), cycling the steps so as to further convert hemicellulose into pentose and to perform enzymatic hydrolysis of the cellulose into glucose. The method improves the conversion rate of cellulose enzymatic hydrolysis, and realizes comprehensive utilization of lignocellulose biomass resources.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing lignocellulosic biomass, in particular to a method for comprehensively utilizing cellulose, hemicellulose and lignin in lignocellulosic biomass. Background technique [0002] With the depletion of fossil fuel resources and the increasing environmental pollution, the use of renewable energy as a substitute for petrochemical products has become increasingly important. Fuel ethanol is the main form of biomass liquid energy and the most likely substitute for fossil fuels. At present, the world's ethanol production mainly uses starches (corn, cassava, etc.) and sugars (sugar cane, sugar beets, etc.) as raw materials for fermentation. The technology of producing ethanol by microbial fermentation is mature, but the high cost of raw materials restricts the industrial application of grain fermentation to produce ethanol. At the same time, there are disadvantages such as competition with people for...

Claims

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Application Information

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IPC IPC(8): C12P19/14C12P19/02C08H7/00C13K13/00C12R1/80
Inventor 唐一林江成真张恩选高绍丰韩文斌崔建丽马军强焦峰张茜刘洁
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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