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Method for dissolving and quickly hydrolyzing lignocellulose biomass as well as device and application thereof

A technology of lignocellulose and biomass, which is applied in the field of biomass dissolution and hydrolysis, can solve the problems of difficult recycling of catalysts, environmental pollution, and increased production costs, and achieve the effects of inhibiting thermal decomposition reactions, reducing environmental pollution, and reducing production costs

Active Publication Date: 2011-02-16
XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the above method, after adding acidic or alkaline catalyst solution, the production cost will be increased, and the catalyst is not easy to recycle, which will easily cause environmental pollution

Method used

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  • Method for dissolving and quickly hydrolyzing lignocellulose biomass as well as device and application thereof
  • Method for dissolving and quickly hydrolyzing lignocellulose biomass as well as device and application thereof
  • Method for dissolving and quickly hydrolyzing lignocellulose biomass as well as device and application thereof

Examples

Experimental program
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Effect test

experiment example

[0030] In order to better understand the essence of the present invention, the technical effect of the present invention and its application prospect in industrial production will be described below with the complete dissolution experiment of willow wood powder.

[0031] Such as figure 1As shown, the experimental device is a miniature visible diamond reactor (Diamond Anvil Cell; DAC), which can rapidly heat the water in the reaction chamber to a high temperature, and can observe the process of dissolving and hydrolyzing wood powder in water. A small hole with a diameter of 500 μm is opened on an iron sheet with a thickness of 250 μm to form a reaction chamber 4 with a volume of 50 nL. After water and wood (or grass) powder were packed into the reaction chamber 4, the small holes were squeezed by two diamonds 3 up and down to seal the holes and generate pressure. If the two diamonds are loosened, nitrogen gas can enter the small hole and generate bubbles. By adjusting the siz...

Embodiment 1

[0085] Put willow powder (length ≤ 250 μm) in pure water to form biomass materials, wherein the solid-liquid volume ratio of willow powder and pure water is 0.6:1; heat the pure water to 370°C; mix pure water and biomass materials Place in the reactor, the concentration of willow wood powder is 20%, the water density is set to 600kg / m3, heated rapidly to 370°C (pressure 34MPa), the heating rate is 8°C / s, and at 315°C, the main dissolution begins, 90% willow powder can be dissolved and hydrolyzed in 6.88 seconds.

Embodiment 2

[0087] Repeat Example 1, with the following differences: wherein the solid-to-liquid volume ratio of willow powder (particle diameter≤1 μm) and pure water is 0.003: 1; pure water is heated to 356 ° C; the mixed willow powder is a concentration of 0.1% , set the water density to 550kg / m3, quickly heat to 356°C (pressure 18MPa), the heating rate is 10°C / s, at 320°C, the main dissolution begins, and it can dissolve and quickly hydrolyze 95% willow in 3.6s pink.

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Abstract

The invention discloses a method and device for dissolving and quickly hydrolyzing lignocellulose biomass. The method comprises the following steps of: placing lignocellulose biomass in pure water, and quickly heating to 330-403 DEG C within 3.38-21.79 s. 89-99% of lignocellulose biomass is dissolved and quickly hydrolyzed into saccharides. The dissolution of the lignocellulose biomass enables the subsequent hydrolysis reaction to be carried out in a homogeneous phase condition. Meanwhile, the solvated biomass can be conveniently applied to a high-pressure flow reactor, and the biomass is continuously pretreated and hydrolyzed into saccharides and other kinds of biofuel and products. The invention has the advantages of no use of any catalyst, no environmental pollution, simple and convenient process and good market application prospects, and belongs to green sustainable industries encouraged by China.

Description

technical field [0001] The invention belongs to the technical field of biomass dissolution and hydrolysis, in particular to a method for dissolving and rapidly hydrolyzing lignocellulosic biomass. At the same time, the present invention also relates to the equipment used in the rapid hydrolysis method and its further application. Background technique [0002] Lignocellulosic biomass in nature, such as wood and grass, is composed of about 50% cellulose, 25% hemicellulose and 20% lignin. Among them, cellulose is mainly used for papermaking. At the same time, cellulose and hemicellulose can be degraded into sugars through hydrolysis, and then used to produce alcohol. The existing lignocellulosic biomass dissolving method mainly uses a batch or semi-continuous osmosis reactor, and dissolves and reacts at 200° C. to 300° C. for 15 minutes. This method can only dissolve and hydrolyze about 40% to 60% of wood or grass into water-soluble substances. Not only the production efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00C12P7/06C08J3/03C08L97/02
CPCY02E50/17Y02E50/16C07C29/00C12P2201/00C12P7/10C13K1/02C12P2203/00C08H8/00Y02E50/10C09K3/00
Inventor 方真
Owner XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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