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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

AI Technical Summary

Problems solved by technology

This process NaOH cannot be recycled, the reaction time is long, and the energy consumption is high

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using corncob as lignocellulose raw material, crush it to a powder of 20 μm, mix corncob powder and water uniformly at a mass ratio of 1:15, and preheat the homogenate to 100°C with ultrasonic radiation power of 800W and duty cycle of 1 , The ultrasonic frequency is 40KHz, the temperature of the preheated homogenate is raised to 150°C, the pressure is 10MPa, and the metal oxide CaO-Al 2 o 3 It is used as a catalyst, and the dosage of the catalyst is 1.2% of the weight of the lignocellulose, the stirring speed is 500 rpm, and the reaction time is 60 minutes, and the hydrolyzed liquid turns light yellow.

Embodiment 2

[0031] Using straw as lignocellulose raw material, crush it to a powder of 100 μm, mix the straw powder and water uniformly at a mass ratio of 1:25, and preheat the homogenate to 120°C with ultrasonic radiation power of 2000W, duty ratio of 0.7, ultrasonic The frequency is 40KHz, the temperature of the preheated homogenate is rapidly raised to 210°C, the pressure is 20MPa, and the loaded metal oxide K 2 CO 3 / ZrO 2 It is used as a catalyst, and the dosage of the catalyst is 1.4% of the weight of the lignocellulose, the stirring rate is 1000 rpm, the reaction time is 120 min, and the hydrolyzate turns yellow.

Embodiment 3

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