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Method for pretreatment of biomass by water-ammonia coupling

A technology for pretreatment of biomass and biomass, applied in fermentation and other directions, can solve problems such as many by-products and high equipment requirements, achieve high recovery rate, solve environmental problems, and improve the efficiency of enzymatic hydrolysis and the effectiveness of enzymes.

Active Publication Date: 2014-08-20
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional NaOH treatment has higher requirements for equipment and more by-products

Method used

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  • Method for pretreatment of biomass by water-ammonia coupling

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Experimental program
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Effect test

Embodiment 1

[0031](1) Use bagasse as the raw material for hydrolysis, crush and sieve the particle size range of 0.2-5mm, add water according to the ratio of solid-liquid mass ratio of 1:20, put it in a high-pressure reactor, seal the reactor, at a speed of 500rpm, 180°C , 4MPa under the condition of reaction for 20min, after the reaction, the hydrolyzate is discharged out of the reactor for collection to realize solid-liquid separation;

[0032] (2) Quickly add ammonia water to the reactor to a concentration of 25%, and react for 60 minutes at a solid-liquid ratio of 1:10 at 160°C and 0.62MPa. After the reaction, the liquid is discharged from the reactor and collected to achieve solid liquid separation;

[0033] (3) After the solid obtained in step (2) is discharged from the high-pressure reactor, add clear water to clean the reactor, and prepare for the next round of reaction;

[0034] (4) Add clear water to clean the reactor after the solid obtained in step (3) is discharged from the ...

Embodiment 2

[0040] (1) Use sawdust as the raw material for hydrolysis, crush and sieve the particle size range of 0.2-5mm, add water according to the ratio of solid-liquid mass ratio of 1:5, put it in a high-pressure reactor, seal the reactor, and operate it at a speed of 500rpm, 140°C, React under the condition of 0.36MPa for 10 minutes, after the reaction, discharge the hydrolyzate out of the reactor for collection, and realize solid-liquid separation;

[0041] (2) Quickly add ammonia water to the reactor to a concentration of 5%, and react for 30 minutes at a solid-to-liquid ratio of 1:15 at 120°C and 0.2MPa. After the reaction, discharge the liquid out of the reactor for collection to achieve solid-liquid separation;

[0042] (3) After the solid obtained in step (2) is discharged from the high-pressure reactor, add clear water to clean the reactor, and prepare for the next round of reaction;

[0043] (4) Add clear water to clean the reactor after the solid obtained in step (3) is dis...

Embodiment 3

[0049] (1) Use corn stalks as raw materials for hydrolysis, crush and sieve the particle size range of 0.2-5mm, add water according to the ratio of solid-liquid mass ratio of 1:8, put it in a high-pressure reactor, seal the reactor, at a speed of 500rpm, 140°C , 0.36MPa under the condition of reaction for 10min, after the reaction, the hydrolyzate is discharged out of the reactor for collection to realize solid-liquid separation;

[0050] (2) Quickly add ammoniacal liquor to the reactor to a concentration of 10%, react at a solid-liquid ratio of 1:20, at 180° C., and 2 MPa for 120 minutes, and discharge the liquid out of the reactor to collect after the reaction to realize solid-liquid separation;

[0051] (3) After the solid obtained in step (2) is discharged from the high-pressure reactor, add clear water to clean the reactor, and prepare for the next round of reaction;

[0052] (4) Add clear water to clean the reactor after the solid obtained in step (3) is discharged from ...

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Abstract

The invention provides a method for pretreatment of biomass by water-ammonia coupling. With lignocelluloses biomass as the raw material, the method is characterized by adopting a high temperature liquid water-ammonia process two-step pretreatment technology. The method specifically includes: firstly using high temperature and high pressure liquid water to hydrolyze the biomass so as to obtain a lignin and cellulose dominated solid product, then conducting ammonia hydrolysis on the solid product, further separating lignin, and then performing enzymolysis. With the advantages of environmental protection and high efficiency, the method provided by the invention can realize efficient and complete utilization of lignocelluloses biomass, the sugar loss is small, and the recovery rate is high. Through the process involved in the invention, resource utilization of forestry, agricultural and sugar industry waste can be achieved, and at the same time the environmental problems caused by waste can be solved.

Description

technical field [0001] The invention relates to the technical fields of biology and energy chemical industry, in particular to a biomass pretreatment method capable of realizing efficient and full utilization of various hydrolyzed products after lignocellulose is hydrolyzed. Background technique [0002] Biomass energy is an important part of new energy, and it is a kind of natural and abundant renewable energy. Different from traditional direct combustion, the use of biomass to produce liquid fuels and chemical crafts can obtain higher added value and has broad prospects. The production of fuels and chemicals from sugar platforms has become a current research trend, and the production of sugar intermediates from lignocellulose hydrolysis has become an important basis. Lignocellulose hydrolysis refers to the process of hydrolyzing cellulose and hemicellulose into six-carbon sugars and five-carbon sugars under certain catalyst and reaction conditions. Dilute acid hydrolysis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/02
Inventor 袁振宏亓伟庄新姝余强谭雪松王琼王闻徐惠娟张宇郭颖梁翠谊
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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