Biomass pretreatment method and application

A biomass and pretreatment technology, applied in the direction of fermentation, etc., can solve problems such as obstacles to the effective use of lignocellulosic biomass, overall structural complexity, etc., and achieve the effects of reducing costs and energy consumption, mild conditions, and environmental friendliness

Active Publication Date: 2022-05-06
WESTLAKE UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many obstacles to the effective utilization of lignocellulosic biomass due to the overall structural complexity of lignocellulosic biomass components.

Method used

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  • Biomass pretreatment method and application
  • Biomass pretreatment method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for pretreatment of biomass, comprising the steps of:

[0044] 1) Crushing and screening of eucalyptus raw materials:

[0045] After pulverizing the eucalyptus wood raw material, passing through a 60-100 mesh sieve to obtain eucalyptus wood powder;

[0046] 2), benzene alcohol extraction:

[0047] The 60-100-mesh eucalyptus powder obtained after sieving in step 1) was extracted with toluene-ethanol (2:1, v / v) for 8 hours, and then put into an oven for drying at 40°C;

[0048] 3), pretreatment of biomass with isosorbide dimethyl ether / water mixed solution:

[0049] Take by weighing absolutely dry to be 1.5g the eucalyptus powder that obtains through step 2) in the pressure bottle, add isosorbide dimethyl ether 15ml in the pressure bottle according to the ratio of solid-to-liquid ratio 1:10 (m / v), Then add a certain amount of 67.5 μl 72% H to the pressure bottle 2 SO 4 solution. The entire reaction system was placed at 100° C. for 60 minutes and continuousl...

Embodiment 2

[0058] The temperature in step 3) of Example 1 was increased to 120° C., and other conditions remained unchanged, the quality of recovered lignin was 0.205 g, and the calculated removal rate of lignin was 79.4%, and the yield was 43.8%.

[0059] The efficiency of cellulose hydrolysis and saccharification in cellulose conversion utilization is 8.1%.

Embodiment 3

[0061] Increase the temperature in step 3) of Example 1 to 120°C, change the volume ratio of isosorbide dimethyl ether to water to 9:1 (v / v), and keep other conditions unchanged, then the quality of recovered lignin is 0.237g , the calculated removal rate of lignin is 91.2%, and the yield is 50.6%.

[0062] The efficiency of cellulose hydrolysis and saccharification in cellulose conversion utilization is 82.1%.

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Abstract

The invention provides a pretreatment method and application of biomass. The method comprises the following steps: 1) crushing and screening biomass raw materials; 2) performing benzene-alcohol extraction; (3) pretreating the biomass by using the mixed solution; and 4) carrying out vacuum filtration to realize solid-liquid two-phase separation. The application mainly comprises application of the biomass pretreatment method in lignin recovery and cellulose conversion. According to the biomass pretreatment method and application, efficient separation of biomass components can be achieved under the normal pressure and mild conditions, and meanwhile the purposes of being environmentally friendly and reducing cost and energy consumption are achieved. The biomass pretreatment method based on the green solvent, provided by the invention, has the remarkable advantages of environmental friendliness, mild conditions, high lignin removal rate and yield, stable solvent, high cellulose enzymolysis saccharification efficiency, easiness in defibration of cellulose and the like.

Description

technical field [0001] The invention belongs to the technical field of biomass treatment, in particular to a biomass pretreatment method and its application. Background technique [0002] The conversion of lignocellulosic biomass is considered to be one of the most promising avenues to address the growing shortage of fossil fuels and the environmental problems caused by their combustion. Through biomass refining technology, liquid fuels such as bioethanol and butanol, or high value-added products such as nanocellulose and comprehensive cellulose can be obtained from agricultural and forestry biomass such as wood, corncobs, bagasse, straw, waste paper, and sawdust. Biomass derived materials. However, there are many obstacles to the effective utilization of lignocellulosic biomass due to the overall structural complexity of lignocellulosic biomass components. Therefore, pretreatment is a key step to deconstruct biomass and fractionate cellulose, hemicellulose and lignin for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C08H7/00
CPCC12P19/14C08H6/00C12P2201/00Y02E50/10
Inventor 王蕾杨爽杨贤鹏
Owner WESTLAKE UNIV
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