Method for hydrolyzing lignocellulose

A lignocellulose, mass ratio technology, applied in the new field of hydrolyzed lignocellulose, can solve the problems of inability to recycle, high energy consumption, long reaction time, etc., and achieves strong tolerance, high hydrolysis efficiency, and high mechanical strength. Effect

Inactive Publication Date: 2010-02-03
XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This process NaOH cannot be recycled, the reactio

Method used

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  • Method for hydrolyzing lignocellulose
  • Method for hydrolyzing lignocellulose
  • Method for hydrolyzing lignocellulose

Examples

Experimental program
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Example Embodiment

[0028] Example 1

[0029] Using corncob as the lignocellulose raw material, crush it to 20μm powder. The corncob powder and water are evenly mixed at a mass ratio of 1:15. The homogenate is preheated to 100°C with ultrasonic, ultrasonic radiation power is 800W, and duty cycle is 1. , Ultrasonic frequency 40KHz, the preheated homogenate is heated to 150℃, the pressure is 10MPa, and the metal oxide CaO-Al 2 O 3 As a catalyst, the amount of the catalyst is 1.2% of the weight of the lignocellulose, the stirring speed is 500 rpm, the reaction time is 60 minutes, and the hydrolysate becomes light yellow.

Example Embodiment

[0030] Example 2

[0031] Using straw as the lignocellulose raw material, it is crushed to 100μm powder, the straw powder and water are evenly mixed at a mass ratio of 1:25, the homogenate is preheated to 120°C with ultrasonic, ultrasonic radiation power is 2000W, duty ratio is 0.7, ultrasonic The frequency is 40KHz, the preheated homogenate is rapidly heated to 210℃, the pressure is 20MPa, and the supported metal oxide K 2 CO 3 / ZrO 2 As a catalyst, the amount of the catalyst is 1.4% of the weight of the lignocellulose, the stirring speed is 1000 rpm, and the reaction time is 120 min. The hydrolysate turns yellow.

Example Embodiment

[0032] Example 3

[0033] Using poplar as the lignocellulose raw material, pulverize it to a powder of 200μm. The poplar powder and water are evenly mixed at a mass ratio of 1:20. The homogenate is preheated to 80°C with ultrasonic, ultrasonic radiation power is 1500W, and duty cycle is 0.7 , Ultrasonic frequency 15KHz, the preheated homogenate is quickly heated to 180℃, the pressure is 6MPa, the anion exchange resin D315 is used as the catalyst, the amount of catalyst is 1.6% of the weight of lignocellulose, the stirring rate is 400rpm, the reaction time is 60min, and the hydrolyzed solution becomes light yellow.

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Abstract

The invention discloses a method for hydrolyzing lignocellulose. Lignocellulose is pulverized into particles, and the particles are mixed with water to form even seriflux; the seriflux is preheated to60-150 DEG C by using ultrasonic waves or microwaves; the preheated even seriflux is quickly heated to 120-300 DEG C, solid alkali is added and used as a catalyst, and stirring and catalytic reactionare simultaneously carried out for 15-300 minutes. The use of the ultrasonic waves or microwaves radiation in synergism with solid alkali for catalyzing and hydrolyzing the lignocellulose can greatlyreduce the reaction time as well as energy consumption. The solid alkali catalyst can be repeatedly used, is easily separated from an aqueous solution, and has the advantages of high mechanical strength, high durability, certain selectivity, relative singularity of catalytic hydrolyzate, high hydrolyzing efficiency and good market application prospect.

Description

technical field [0001] The invention belongs to the technical field of lignocellulose hydrolysis, and in particular relates to a new method for hydrolyzing lignocellulose. Background technique [0002] Human beings are facing enormous energy and environmental pressure. The application of mineral energy promotes the development of social economy, but its resources are increasingly depleted and cause increasingly serious environmental problems. In order to maintain sustainable economic development, many countries are actively developing renewable bio-energy, adapting measures to local conditions, using bio-energy to replace fossil fuel oil, and promoting the transformation of energy consumption structure from simplification to diversification, which has become a major trend in the development of new energy in the world . [0003] As an important part of bioenergy, fuel ethanol is currently mainly obtained from hydrolysis and fermentation of grain or sugar as raw materials. ...

Claims

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Application Information

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IPC IPC(8): C08B15/02
Inventor 邓欣方真张帆
Owner XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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