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Comprehensive utilization method of lignocellulose biomass

A lignocellulose and biomass technology, applied in the field of comprehensive utilization of cellulose, hemicellulose and lignin in lignocellulosic biomass, can solve the problem of not being able to obtain high activity, high hemicellulose and cellulose extraction rate at the same time and other problems to achieve the effect of shortening the running time, maintaining activity and reducing inhibition

Active Publication Date: 2013-04-17
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
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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 high active lignin, higher hemicellulose and cellulose extraction rate cannot be obtained simultaneously when comprehensively utilizing cellulose, hemicellulose and lignin in the prior art. problems, thus a comprehensive utilization method of lignocellulosic biomass was proposed

Method used

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  • Comprehensive utilization method of lignocellulose biomass
  • Comprehensive utilization method of lignocellulose biomass
  • Comprehensive utilization method of lignocellulose biomass

Examples

Experimental program
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Effect test

Embodiment 1

[0075] (1) N level hydrolysis

[0076] In the present embodiment: what adopt is tertiary acid hydrolysis, at first corn cob (mass component composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.1%, lignin 23.7%, other 2.95%) is smashed, Then add the newly prepared acid solution into the first-stage hydrolysis reactor, add the acid solution discharged from the first-stage acid hydrolysis reactor into the second-stage hydrolysis reactor, and add the acid solution discharged from the second-stage hydrolysis reactor into the third In the first-stage hydrolysis reaction kettle, the acid solution discharged from the third-stage reaction kettle is the final pentose solution, and the acid hydrolysis residue in the first-stage hydrolysis reaction kettle is taken out, and then new corn cob raw materials are put into it. The first-stage hydrolysis reactor is used as a new third-stage reactor, the original second-stage reactor is used as a new first-stage reactor, and the origin...

Embodiment 2

[0105] (1) N-level acid hydrolysis

[0106] Raw material and method are with embodiment 1 step (1), and difference is: the time of first-order hydrolysis reaction is 3 hours, and the time of second-order hydrolysis reaction is 2 hours, and the time of third-order hydrolysis reaction is 1 hour, every The temperature of grade acid hydrolysis is 110 ℃; The weight of acid hydrolysis residue obtained is 1.66×10 3 kg (the water content is about 65%, the absolute dry content of hemicellulose is 6.44%, the absolute dry content of cellulose is 52.9%, the absolute dry content of lignin is 35.27%), and the pentose sugar solution is 8.33×10 3 kg, the concentration of pentose sugar was 3.64%, and the extraction rate of hemicellulose was 89%.

[0107] (2) Enzymatic hydrolysis of cellulose

[0108] The conditions of the enzymolysis are: cellulase is commercially available cellulase (Heshibi Biotechnology Co., Ltd., 4w unit), and all the acid hydrolysis residues obtained in step (1) are tak...

Embodiment 3

[0118] (1) N-level acid hydrolysis

[0119] Raw material and method are with embodiment 1 step (1), and difference is that the time of first-order hydrolysis reaction is 1 hour, and the time of second-order hydrolysis reaction is 0.75 hour, and the time of third-order hydrolysis reaction is 0.5 hour, every The concentration of phosphoric acid hydrolyzed by grade acid is 15%; The weight of finally obtained acid hydrolysis residue is 1.80×10 3 kg (the water content is about 65%, the absolute dry content of hemicellulose is 10.27%, the absolute dry content of cellulose is 50.74%, and the absolute dry content of lignin is 34.01%), the pentose sugar solution is 8.20×10 3 kg, the concentration of pentose sugar was 3.37%, and the extraction rate of hemicellulose was 81%.

[0120] (2) Enzymatic hydrolysis of cellulose

[0121] Carry out enzymolysis to the above-mentioned acid hydrolysis residue, carry out cellulose enzymolysis according to the method for embodiment 1 step (2), diffe...

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Abstract

The invention relates to a comprehensive utilization method of lignocellulose biomass. The method comprises the following steps of (a) performing N-stage hydrolysis on the lignocellulose biomass, wherein reaction kettles of the N-stage hydrolysis are connected end to end, one of the reaction kettle is designed as a first stage and a final reaction kettle is designed as an N stage, a freshly prepared acid solution is added in the first stage reaction kettle, a final pentose solution obtained by hydrolysis is discharged from the N stage reaction kettle, final acid hydrolysis residues obtained by acid hydrolysis are discharged from the first stage reaction kettle, and new materials are loaded on the first stage reaction kettle, the first stage hydrolysis reaction time is 1-4 hours, the subsequent hydrolysis reaction time is reduced by 0.25-1.5 hours stage by stage, and N is an integer larger than or equal to 2; (b) performing enzymatic hydrolysis on the acid hydrolysis residues in the step (a) by using cellulose, so that a glucose solution and enzymatic hydrolysis residues are obtained; and (c) treating the enzymatic hydrolysis residues produced in the step (b) with an alkali solution, so that lignin in the enzymatic hydrolysis residues can be extracted. The above method realizes maximized resource utilization of the lignocellulose biomass.

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 limits the industrial application of grain fermentation to produce ethanol. At the same time, there are disadvantages such as competition with people for gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/02C08H7/00C13K13/00C12R1/80
Inventor 唐一林江成真高绍丰张恩选马军强栗昭争赵兴国郭雨霖
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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