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Method for coproducing cellulosic ethanol, furfural, lignin and feed from plant fibers

A plant fiber and cellulose technology, applied in the direction of microorganism-based methods, animal feed, animal feed, etc., can solve the problems of low raw material utilization rate, poor economic benefit, high production cost, etc., and achieve improved utilization rate, improved utilization efficiency, Realize the effect of using

Inactive Publication Date: 2012-02-15
NANJING FORESTRY UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Purpose of the invention: In view of the problems of low raw material utilization rate, high production cost and poor economic benefit in the processing and production of fiber fuel ethanol of existing plant fiber raw materials, in order to realize efficient comprehensive utilization of plant fiber raw materials, develop and provide a plant fiber raw material combination Efficient cleaning method for producing cellulosic ethanol, furfural, lignin and protein compound feed

Method used

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  • Method for coproducing cellulosic ethanol, furfural, lignin and feed from plant fibers
  • Method for coproducing cellulosic ethanol, furfural, lignin and feed from plant fibers

Examples

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Effect test

Embodiment 1

[0032] Put 100g of corn stalks crushed into a size of about 10mm into a steam explosion device, add 0.05-0.1% dilute sulfuric acid solution according to the liquid-solid ratio of 1:1, and then add steam to increase the pressure to 1.4-1.6MPa, and maintain 2-3 A few minutes later, the quick-opening valve is opened to release the material, and the slag water is separated by filtration and washed with a small amount of water to obtain a pentosan hydrolyzate. Add pH5.0 citric acid-disodium hydrogen phosphate buffer solution according to liquid-solid ratio 9:1 to the solid matter after steam explosion pretreatment, add the hemicellulase that enzyme dosage is 100U / g substrate after sterilization, in Enzymolysis was carried out at 50°C and 120 rpm for 36 hours, the solid residue was separated by filtration, and the filtrate was deproteinized to obtain pentosan hydrolyzate. The two parts of the pentosan hydrolyzate were combined and concentrated to obtain a pentose solution with a red...

Embodiment 2

[0034] Put 50g of corn stalks crushed into about 5mm in size into a 1000mL Erlenmeyer flask, add pH5.0 citric acid-disodium hydrogen phosphate buffer solution according to the liquid-solid ratio of 9:1, and add enzyme at 100U / g base after sterilization The hemicellulase of the product was hydrolyzed at 50°C and 120rpm for 36 hours, and the solid residue was separated by filtration. The filtrate was deproteinized and concentrated to obtain a pentose sugar solution with a reducing sugar content of 80g / L. Take 100mL of the pentose solution, put it in a 1L reaction kettle, add 2% titanium-zirconium composite solid acid catalyst, dehydrate and cyclize at 140°C for 2 hours, filter and recover the catalyst, and obtain furfural by distillation and condensation of the reaction product under reduced pressure Product, analyze and calculate the yield of furfural. In the solid slag obtained after enzymatic hydrolysis of hemicellulose, add pH5.0 citric acid-disodium hydrogen phosphate buffe...

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Abstract

The invention provides a method for producing furfural and ethanol from plant fibers, which comprises the following steps: carrying out catalytic hydrolysis on the plant fibers, separating by filtration, and carrying out enzyme removal treatment to obtain a pentosan hydrolysate; carrying out dehydration cyclization on the hydrolysate by using a binary composite solid acid catalyst to prepare the furfural product; taking the solid residue obtained in the previous step, adding a buffer solution of which the pH value is 4-6 in a liquid-to-solid ratio of 9:1-5:1, sterilizing, adding 40-100IU of cellulase to every gram of substrate, carrying out enzymolysis for 24-48 hours, filtering out the hydrolysis residue, and removing zymoprotein from the filtrate to obtain the cellulose hydrolysate glucose solution; and adding a liquid yeast cell culture medium into the cellulose hydrolysate obtained in the previous step, sterilizing, inoculating into a 0.5-1% Saccharomyces cerevisiae seed culture liquid, carrying out fermentation and culture for 36-48 hours, and carrying out centrifugal separation to recycle the yeast cells, wherein the supernatant is the ethanol product.

Description

technical field [0001] The invention belongs to the technical field of biomass energy and chemicals, and relates to a method for efficiently and comprehensively utilizing plant fiber raw materials to co-produce cellulosic ethanol, furfural, lignin and feed. The method can realize the full utilization of biomass, simultaneously produce multiple products such as biofuels and chemicals, effectively improve the utilization rate of raw materials, and significantly improve the economic benefits of biomass utilization. Background technique [0002] Since the beginning of the 21st century, human beings have faced more prominent resource and environmental problems. With the increasing shortage of fossil resources such as petroleum, human beings have entered the post-petroleum era. It has become an urgent task for human beings to find alternative resources for petroleum and process them to obtain energy, various chemicals and materials. Scientists predict that the 21st century wi...

Claims

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Application Information

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IPC IPC(8): C07D307/50C12P17/04C12P7/10C08H7/00A23K1/14C12R1/865A23K10/16A23K10/30A23K10/37A23K20/189
CPCY02E50/10Y02P60/87
Inventor 王飞李迅赵林果钱方军
Owner NANJING FORESTRY UNIV
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