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A kind of method of hydrothermal-peracetic acid metal salt synergistic pretreatment of poplar fiber

A technology of metal peracetic acid and poplar fiber, which is applied in wood treatment, wood treatment details, fiber raw material treatment, etc. Improve the degradation and dissolution rate, low cost, and reduce environmental pollution

Active Publication Date: 2022-07-26
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art such as long pretreatment time, large consumption of acid-base chemicals, high cost, and large environmental pollution, and provide a simple-to-operate, low-cost, high-efficiency The poplar fiber pretreatment method realizes a large amount of hemicellulose degradation in the poplar fiber, making the poplar structure loose and the surface area increased, laying a solid foundation for the subsequent enzymatic fermentation to produce ethanol

Method used

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  • A kind of method of hydrothermal-peracetic acid metal salt synergistic pretreatment of poplar fiber
  • A kind of method of hydrothermal-peracetic acid metal salt synergistic pretreatment of poplar fiber
  • A kind of method of hydrothermal-peracetic acid metal salt synergistic pretreatment of poplar fiber

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Effect test

Embodiment 1

[0031] The method for the synergistic pretreatment of poplar fiber by hydrothermal-peracetic acid metal salt of the present invention comprises the following steps:

[0032] S1, get the dry poplar chip raw material, pass through 40 mesh sieves after grinding and crushing, obtain poplar powder, and moisture content is 5.5%;

[0033] S2, take 1 g of poplar powder obtained in step S1, add 20 mL of peracetic acid solution with a volume solubility of 5v%, ultrasonically vibrate for 30 min, and let stand for 30 min to obtain a material mixture;

[0034] S3, in the material mixed solution obtained in step S2, add 1.08g of ferric chloride, and mix uniformly to obtain a mixture, that is, the concentration of ferric chloride in the mixture is 0.2mol / L, stand for 5min, and transfer to The three-necked flask was placed in an oil bath and heated to 120°C for hydrothermal reaction, and the reaction time was 20min;

[0035] S4. The reaction product obtained in step S3 is subjected to solid-...

Embodiment 2

[0039] The method for the synergistic pretreatment of poplar fiber by hydrothermal-peracetic acid metal salt of the present invention comprises the following steps:

[0040] S1, get the dry poplar chip raw material, pass through 40 mesh sieves after grinding and crushing, obtain poplar powder, and moisture content is 5.5%;

[0041] S2. Weigh 1 g of the poplar powder obtained in step S1, add 20 mL of peracetic acid solution with a volume solubility of 10 v%, ultrasonically vibrate for 30 min, and let stand for 30 min to obtain a material mixture;

[0042] S3, in the material mixed solution obtained in step S2, add 1.08g ferric chloride, and after mixing evenly, obtain a mixture, that is, the concentration of ferric chloride in the mixture is 0.2mol / L, stand for 5min, transfer to The three-necked flask was placed in an oil bath and heated to 120°C for hydrothermal reaction, and the reaction time was 20min;

[0043] S4. The reaction product obtained in step S3 is subjected to so...

Embodiment 3

[0045] The method for the synergistic pretreatment of poplar fiber by hydrothermal-peracetic acid metal salt of the present invention comprises the following steps:

[0046] S1, get the dry poplar chip raw material, pass through 40 mesh sieves after grinding and crushing, obtain poplar powder, and moisture content is 5.5%;

[0047] S2. Weigh 1 g of the poplar powder obtained in step S1, add 20 mL of peracetic acid solution with a volume solubility of 20 v%, ultrasonically vibrate for 30 min, and let stand for 30 min to obtain a material mixture;

[0048] S3, in the material mixed solution obtained in step S2, add 1.08g ferric chloride, and after mixing evenly, obtain a mixture, that is, the concentration of ferric chloride in the mixture is 0.2mol / L, stand for 5min, transfer to The three-necked flask was placed in an oil bath and heated to 120°C for hydrothermal reaction, and the reaction time was 20min;

[0049] S4. The reaction product obtained in step S3 is subjected to so...

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Abstract

The invention discloses a method for the synergistic pretreatment of poplar fibers with hydrothermal-peracetic acid metal salts, comprising the following steps: S1, taking dry poplar chips raw materials, grinding and crushing them and then sieving to obtain poplar wood powder; S2, Weigh the poplar powder obtained in step S1, add peracetic acid solution, ultrasonically oscillate, and let stand to obtain a material mixture; S3, in the material mixture obtained in step S2, add solid ferric chloride, and mix uniformly to obtain The mixed material is allowed to stand, transferred to a reaction vessel, heated, and subjected to a hydrothermal reaction; S4, the reaction product obtained in step S3 is subjected to solid-liquid separation to complete the pretreatment of poplar fibers. In the method of the present invention, the synergistic effect of peracetic acid and ferric chloride improves the hydrothermal treatment effect of poplar fiber, promotes the conversion of more hemicellulose into xylose and dissolves, and exposes more accessible sites for enzymes It is beneficial to the subsequent enzymatic hydrolysis and fermentation to produce ethanol.

Description

technical field [0001] The invention belongs to the fields of biomass energy and materials, new energy and wood biomass refining, and in particular relates to a method for synergistic pretreatment of poplar fibers with hydrothermal-peracetic acid metal salt. Background technique [0002] The cell wall of lignocellulosic biomass raw materials is mainly composed of cellulose, hemicellulose and lignin connected by complex actions and forms. The anti-degradation barrier formed by the composite structure of the cell wall of lignocellulosic biomass has a protective effect on the plant itself, but also hinders the transformation of lignocellulosic biomass to a certain extent. In order to improve the efficiency of biomass conversion, it is necessary to change the physical or chemical properties of the material through the pretreatment process, remove most of the hemicellulose in the lignocellulosic biomass to make it loose and expose more enzyme contact sites, so as to overcome the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27L11/06B27K5/00D21C5/00C12P7/10
CPCB27L11/06B27K5/0065B27K5/001D21C5/00C12P7/10C12P2201/00Y02E50/10
Inventor 陈介南周永财詹鹏卿彦张林刘进黄一磊
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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