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Method for removing lignin from biomass by using alkaline electrolyzed functional water

A technology of electrogenerating functional water and lignin, which is applied in textiles, papermaking, and fiber raw material processing, etc., to achieve the effects of simple preparation, convenient preparation, and low-carbon economy

Inactive Publication Date: 2011-02-02
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no literature report on the application of alkaline electrolyzed water in the field of biomass pretreatment

Method used

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  • Method for removing lignin from biomass by using alkaline electrolyzed functional water

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Effect test

Embodiment 1

[0033] Example 1. Pretreatment of corn stalks with alkaline electro-generated functional water

[0034]The aqueous solution containing 1‰NaCl was electrolyzed for 30min at a voltage of 40V (the current changes during the electrolysis process and gradually increases, so a constant voltage electrolysis method is used, the same below), and the pH value is 11.5, and the redox potential is -867mV alkaline electrogenerated functional water. Take by weighing 2.0g of corn stalk powder dry weight (wherein, cellulose 35.23%, hemicellulose 24.75%, lignin 18.9%, other 21.12%) with a particle diameter of 40-80 mesh, put into a stainless steel continuous tube with a volume of 40ml type reactor, and make the reactor filled with the alkaline electrogenerated functional water, put the reactor into an oil bath with a temperature of 160°C, and pump the alkaline electrogenerated functional water at a flow rate of 8mL / min through a high-pressure pump Inject into continuous tubular reactor. The p...

Embodiment 2

[0035] Embodiment 2, alkaline electric functional water pretreatment corn cob

[0036] The aqueous solution containing 2‰NaCl was electrolyzed in an ice-water bath for 60 minutes at a voltage of 60V to obtain alkaline electrogenerated functional water with a pH value of 12.4 and an oxidation-reduction potential of -948mV. Take by weighing 2.0g of corn cob powder dry weight (wherein, cellulose 31.24%, hemicellulose 41.16%, lignin 12.53%, other 15.07%) with a particle diameter of 40-80 mesh, put into a stainless steel continuous tube with a volume of 40ml type reactor, and make the reactor filled with the alkaline electrogenerated functional water, put the reactor into an oil bath with a temperature of 170°C, and pump the alkaline electrogenerated functional water at a flow rate of 12mL / min through a high-pressure pump Inject into continuous tubular reactor. The pressure is controlled at 2MPa, the reaction time is 15min, and the hydrolyzate is collected through a condenser. Af...

Embodiment 3

[0037] Embodiment 3, alkaline electrogenic functional water pretreatment bagasse

[0038] 2L of aqueous solution containing 1‰NaCl is circulated by a water pump through the NdFeB magnetic field channel with a strength of 10000Gs in the normal direction, and the cross-sectional area of ​​the channel is 5cm 2 , with a length of 20cm and a velocity of 2.5m·s -1 , the time is 3h. The magnetized electrolyte solution was electrolyzed in an ice-water bath for 5 minutes at a voltage of 60V to obtain alkaline electrogenerated functional water with a pH value of 12.5 and an oxidation-reduction potential of -967mV.

[0039] Take by weighing particle diameter and be the bagasse powder of 40-80 purpose (wherein, cellulose 35.79%, hemicellulose 25.78%, lignin 20.01%, other 18.42%) dry weight 2.0g, put into the stainless steel continuous tube that volume is 40ml type reactor, and make the reactor filled with the alkaline electrogenerated functional water, put the reactor into an oil bath w...

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Abstract

The invention discloses a method for removing lignin from a biomass raw material. The method comprises the step of placing the biomass raw material into alkaline electrolyzed functional water to perform a continuous hydrolysis reaction so as to remove the lignin, one of the three components in the biomass raw material, to obtain cellulose and hemicellulose so as to contribute to the later enzymolysis and fermentation. The alkaline electrolyzed functional water is applied to a biomass pretreatment technique; and compared with the method using the traditional media such as aqueous alkali and the like, the method for removing the lignin from the biomass raw material by using the alkaline electrolyzed functional water has the advantages of: (1) simple preparation, no toxicity, no harm and low price; (2) basically no negative influence on environments, no wastes, no waste liquid and green production process; and (3) no negative influences, such as corrosion, damage and the like, on stainless steel pretreatment equipment. By the method of the invention, the removing rate of the lignin from the biomass raw material is up to 90 percent.

Description

technical field [0001] The invention belongs to the field of biomass conversion and utilization, and in particular relates to a method for removing lignin in biomass by using alkaline electrogenerated functional water. Background technique [0002] Cellulosic biomass is the world's largest renewable resource. Using biomass as a precursor to produce renewable energy and other bulk compounds can not only alleviate the current energy crisis, but also alleviate the current environmental pollution problem. However, due to the complex structure of biomass itself, the conversion process from biomass to final products requires a lot of energy and chemical reagents, which increases the cost of conversion. Lignin is one of the three major components of biomass, closely combined with other components to form a rigid structure of biomass to prevent damage by foreign organisms. Lignin can cause ineffective adsorption of cellulase during enzymatic hydrolysis, reduce enzymatic hydrolysis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00C08B37/14C08L5/14C08L1/02
Inventor 孙君社裴海生刘莉张秀清
Owner CHINA AGRI UNIV
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