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Method of high-efficiency pretreatment on biomass

A biomass and pretreatment technology, applied in the direction of lignin derivatives, chemical instruments and methods, monosaccharides, etc., can solve the problems of lack of efficient pretreatment methods, no industrialized methods, high cost of cellulase, etc. , to achieve the effect of promoting the development of green agriculture, realizing waste utilization and high recovery rate

Inactive Publication Date: 2009-11-25
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The development of science and technology in the 21st century is called "sugar economy" or "carbohydrate economy". Degrading plant fibers into sugar intermediates is an important basis and guarantee for promoting the realization of "sugar economy", but there is no industrialized method yet
[0008] Enzyme hydrolysis is currently recognized as the mainstream technology for biomass hydrolysis, but it faces difficulties such as the lack of efficient pretreatment methods and the high cost of cellulase

Method used

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  • Method of high-efficiency pretreatment on biomass

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Embodiment 1

[0039] Use eucalyptus as the raw material for hydrolysis, crush and sieve it, use 0.5-2mm eucalyptus wood chips as the raw material, add water according to the mass ratio of liquid to solid ratio of 20:1, feed the material into the high-pressure reactor, close the reaction system, and stir at a speed of 500r / Min, under the condition of pressure 2Mpa, react at 160°C for 60min, or at 4Mpa at 180°C for 20min, or at 4Mpa at 200°C for 10min, to obtain the highest value of xylose and its oligosaccharide products, cool and collect the liquid product, and complete The first step of pretreatment: quickly pour deionized water at room temperature into the kettle, with a liquid-solid ratio of 20:1; heat to 200°C and keep the liquid product at a pressure of 4Mpa for 30 minutes to collect, or heat to 240°C to keep the liquid product for 20 minutes to collect , or heated to 260°C, cooling and collecting the liquid product immediately; add water to the kettle, wait for the solid product to co...

Embodiment 2

[0041] Use eucalyptus as the raw material for hydrolysis, crush and sieve it, use 0.5-2mm eucalyptus wood chips as the raw material, add water at a mass ratio of liquid to solid 5:1, put it into a high-pressure reaction system, seal the reaction system, and heat it to 180°C. Under the condition of a pressure of 10Mpa, react for 20 minutes, cool and collect the liquid product, and complete the first step of pretreatment; quickly pour deionized water at room temperature into the kettle, with a liquid-solid ratio of 5:1, heat to 200°C for 20 minutes, and immediately The liquid product is cooled and released, and water is added to the reactor. After the solid product is cooled to room temperature, it is taken out to complete the second step of pretreatment; the cooled solid product is the product that has undergone the second step of variable temperature pretreatment, and it is used as the raw material for enzymatic hydrolysis. Enzyme hydrolysis, enzymatic hydrolysis conditions: pH...

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Abstract

The invention discloses a method capable of carrying out green high-efficiency hydrolysis pretreatment on lignocellulose biomass. The method in the invention comprises the steps of hydrolyzing the hemicellulose in the cellulose biomass into saccharide products mainly containing xylose and oligose thereof using a two-step temperature-changing segmentation hydrolysis method so as to accomplish the pretreatment, and adding the pretreated solid raw material mainly containing cellulose and lignin to cellulase so as to accomplish enzymatic hydrolysis and recover the saccharide products to the utmost extent. The invention uses high-temperature liquid water as reaction medium, has the advantages that the method has low cost and is environment-friendly and green. The reaction conditions are moderate, the saccharide products are degraded less, and the recovery rate is high. By adopting the two-step temperature-changing segmentation hydrolysis method, the method not only hydrolyzes the hemicellulose to the utmost extent to obtain the saccharide products, but also further pre-treats the raw material such that the cellulose is made into glucose through enzymatic hydrolysis, reaching the purpose of protecting environment and hydrolyzing the lignocellulose biomass highly effectively. The raw material is capable of realizing waste utilization and promotes the development of green industries.

Description

technical field [0001] The invention relates to the technical fields of biochemistry and chemical industry, in particular to a green and high-efficiency pretreatment method for cellulosic biomass and equipment for its realization. technical background [0002] Biomass is recognized by the world's energy circles as the only renewable energy resource that can fix carbon, and it has broad prospects for the production of liquid fuels and chemical products. There are two technical routes for the production of liquid fuels and chemical products from biomass: one is to obtain synthesis gas through biomass gasification and then realize it through chemical and biochemical methods; the other research route is to build a sugar platform, that is, to convert biomass into The polysaccharide component-cellulose and hemicellulose are hydrolyzed to obtain sugars, which are further processed and processed to obtain energy and chemical products such as biogasoline, ethanol, butanol, xylitol, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/02C07G1/00C07H3/02C07H3/06C07D307/48C08H7/00
Inventor 袁振宏庄新姝余强亓伟王琼许敬亮朱顺妮
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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