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Lignocellulose biomass component separation method

A lignocellulosic and biomass technology, which is applied in fiber raw material processing, textiles and papermaking, etc., can solve problems such as high energy consumption, difficult solvent circulation, high environmental pressure, etc. The effect of equipment requirements

Active Publication Date: 2019-01-04
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing method of component separation can effectively break the lignocellulose structure and realize partial or complete separation of the components, the existing technology often requires a high reaction temperature (>150°C), uses a strong oxidant, and makes solvent circulation difficult , alcohol analysis and repeated acid-base adjustment and other complex processes are prone to high energy consumption and high environmental pressure problems in the actual application process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] With 1g of pennisetum (containing 32% cellulose, 22% hemicellulose, and 28% lignin) with a particle size of 0.5mm as raw material, in the reactor, by mass volume ratio 1g: 20cm 3 Add raw material and tetrahydrofurfuryl alcohol mixed solution (by volume mass ratio 1cm 3 :0cm 3 : 0g of tetrahydrofurfuryl alcohol, water and sulfuric acid catalyst), after reacting at 120 ℃ for 120min, filter to obtain filter residue 0.75g (cellulose content 40.5%) rich in cellulose components; after adding 5 times of volume water to the filtrate, Filtrate to obtain 0.04 g of lignin component filter residue (lignin content>93%); the filtrate is distilled under reduced pressure to recover tetrahydrofurfuryl alcohol, and the obtained residue is washed with ethanol and filtered to obtain 0.06 g of hemicellulose component filter residue.

Embodiment 2

[0021] With 1g of pennisetum (containing 32% cellulose, 22% hemicellulose, and 28% lignin) with a particle size of 0.5mm as raw material, in the reactor, by mass volume ratio 1g: 5cm 3 Add raw material and tetrahydrofurfuryl alcohol mixed solution (by volume mass ratio 1cm 3 :0.2cm 3 : 0.05g of tetrahydrofurfuryl alcohol, water and sulfuric acid catalyst), after reacting for 12h at 60°C, filter to obtain filter residue 0.53g (cellulose content 57.3%) rich in cellulose components; after adding 5 times the volume of water to the filtrate , filtered to obtain lignin component filter residue 0.10g (lignin content > 93%); the filtrate was distilled under reduced pressure to recover tetrahydrofurfuryl alcohol, and the obtained residue was washed with ethanol and filtered to obtain 0.05g hemicellulose component filter residue.

Embodiment 3

[0023] With 1g of pennisetum with a particle size of 0.5mm (containing 32% cellulose, 22% hemicellulose, and 28% lignin) as raw material, in the reactor, the mass-volume ratio of 1g: 10cm 3 Add raw material and tetrahydrofurfuryl alcohol mixed solution (by volume mass ratio 1cm 3 :0cm 3 : 0.01g of tetrahydrofurfuryl alcohol, water and sulfuric acid catalyst), after reacting for 2h at 100°C, filter to obtain filter residue 0.42g (cellulose content 70.6%) rich in cellulose components; after adding 5 times the volume of water to the filtrate , and filtered to obtain 0.11 g of lignin component filter residue (lignin content>93%); the filtrate was distilled under reduced pressure to recover tetrahydrofurfuryl alcohol, and the obtained residue was washed with ethanol and filtered to obtain 0.15 g of hemicellulose component filter residue.

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Abstract

The invention discloses a lignocellulose biomass component separation method. According to the method, through mixing of a tetrahydrofurfuryl alcohol solution and lignocellulose biomass, degradation stripping of hemicellulose in a raw material and dissolution of lignin are completed in a hydrothermal environment, separation of cellulose, the hemicellulose and the lignin in lignocellulose biomass is achieved at a low temperature, and energy consumption can be effectively reduced. The pressure in a reaction process is low, and the requirements for a device can be effectively reduced. The technical process is simple, the tetrahydrofurfuryl alcohol solution can be recycled, and the cost can be effectively reduced.

Description

Technical field: [0001] The invention relates to the technical field of biomass energy conversion and utilization, in particular to a method for separating lignocellulosic biomass components. Background technique: [0002] The current non-renewable and massive consumption of fossil fuels has led to the continuous deterioration of energy supply and ecological environment, which has aroused people's attention to the research and development of environmentally friendly renewable energy. In this context, research on lignocellulosic biomass refining, fuels and chemicals used to produce alternative petroleum products has received increasing attention. [0003] Lignocellulose is a natural polymer complex produced by plants through photosynthesis. It is the most abundant biomass resource in nature. It is mainly composed of cellulose, hemicellulose and lignin. Complex three-dimensional structure of space. Due to the crystalline structure of cellulose and the net-like embedding of h...

Claims

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Application Information

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IPC IPC(8): C08B37/14C08H7/00D21C5/00
CPCC08B37/0003C08H6/00D21C5/00
Inventor 谭雪松王闻庄新姝余强王琼亓伟王忠铭袁振宏
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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