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Method for preparing biomass gas, activated carbon and products thereof

A technology of biomass gas and activated carbon, which is applied in the field of preparation of biomass gas, co-product gas and activated carbon, and preparation of activated carbon, which can solve the problems of low specific surface area of ​​activated carbon and low utilization rate of straw

Active Publication Date: 2020-10-30
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking corn stalks as an example, the current degradation treatment methods mainly include conversion into feed, degradation into fertilizer and biomass power generation, etc., but the utilization rate of these methods is very low, less than 10%.
However, the specific surface area of ​​activated carbon prepared by this activation method is relatively low.

Method used

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  • Method for preparing biomass gas, activated carbon and products thereof
  • Method for preparing biomass gas, activated carbon and products thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] refer to figure 1 The process shown is to co-produce gas and activated carbon from corn stalks.

[0070] The particle size of the corn stalk is between 20 mm and 30 mm, and the water content is ≤12% (w / w). The corn stalks are soaked with a sulfuric acid solution with a mass concentration of 0.25% for 2 hours, and the dosage of the sulfuric acid solution is 0.40-0.45 kg / (kg corn stalks). Then, the corn stover was pretreated by continuous steam explosion at 195 °C for 6 min. The obtained steamed material is subjected to synchronous saccharification and fermentation reaction, wherein the substrate mass concentration is 10%, the amount of cellulase is 22 FPU / (g cellulose), the yeast concentration is 5g / L, the reaction temperature is 35°C, and the synchronous saccharification and fermentation time 96 hours. The reaction product is continuously distilled to remove cellulosic ethanol, and then after centrifugal sedimentation, the upper light phase component—yeast protein is...

Embodiment 2

[0072] refer to figure 1 The process shown is to co-produce gas and activated carbon from corn stalks.

[0073] The particle size of the corn stalk is between 20 mm and 30 mm, and the water content is ≤12% (w / w). The corn stalks are soaked with a sulfuric acid solution with a mass concentration of 0.25% for 2 hours, and the dosage of the sulfuric acid solution is 0.40-0.45 kg / (kg corn stalks). Then, the corn stover was pretreated by continuous steam explosion at 195 °C for 6 min. The obtained steamed material is subjected to synchronous saccharification and fermentation reaction, wherein the substrate mass concentration is 10%, the amount of cellulase is 22 FPU / (g cellulose), the yeast concentration is 5g / L, the reaction temperature is 35°C, and the synchronous saccharification and fermentation time 96 hours. The reaction product is continuously distilled to remove cellulosic ethanol, and then centrifuged to remove the upper light phase component—yeast protein, and the rema...

Embodiment 3

[0075] refer to figure 1 The process shown is to co-produce gas and activated carbon from corn stalks.

[0076] The particle size of the corn stalk is between 20 mm and 30 mm, and the water content is ≤12% (w / w). The corn stalks are soaked with a sulfuric acid solution with a mass concentration of 0.25% for 2 hours, and the dosage of the sulfuric acid solution is 0.40-0.45 kg / (kg corn stalks). Then, the corn stover was pretreated by continuous steam explosion at 195 °C for 6 min. The obtained steamed material is subjected to synchronous saccharification and fermentation reaction, wherein the substrate mass concentration is 10%, the amount of cellulase is 22 FPU / (g cellulose), the yeast concentration is 5g / L, the reaction temperature is 35°C, and the synchronous saccharification and fermentation time 96 hours. The reaction product is continuously distilled to remove cellulosic ethanol, and then after centrifugal sedimentation, the upper light phase component—yeast protein is...

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Abstract

The invention belongs to the field of chemical engineering and biomass energy, particularly relates to the field of biomass utilization and more particularly relates to a method for preparing biogas.The method comprises the following steps: carbonizing a raw material containing rich lignin at 400-600 DEG C for 10-90 min to obtain a lignin carbonized material, and separating out gas. The inventionfurther relates to a method for preparing activated carbon, the prepared activated carbon and a co-production method for the biogas and the activated carbon. Biogas with high fuel value and the activated carbon with large specific surface area are obtained with the methods, and with adoption of the methods, effective degradation and regeneration of plant straw are realized, and environmental pressure and energy pressure are relieved.

Description

technical field [0001] The invention belongs to the field of chemical engineering and biomass energy biomass utilization, relates to the field of biomass utilization, in particular to a method for preparing biomass gas, a method and product for preparing activated carbon, and a method for co-producing biomass gas and activated carbon. Background technique [0002] Every year, a large number of plant straw wastes need to be degraded and treated in the whole country. Among them, corn stalks rank first in agricultural solid waste, and the annual output in my country is more than 200 million tons per year. Plant straw is mainly composed of cellulose, hemicellulose and lignin; among them, hemicellulose is easily hydrolyzed into five-carbon sugars, cellulose is difficult to be hydrolyzed into six-carbon sugars, and lignin is generally used as fuel. Taking corn stalks as an example, the current degradation treatment methods mainly include conversion into feed, degradation into fer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/02C10B57/08C01B32/318C01B32/342C10K1/00
CPCC01P2006/12C10B53/02C10B57/08C10K1/002Y02E50/10
Inventor 赵鹏翔卜令习刘彦涛赵正凯蒋建新赵锦
Owner STATE GRID CORP OF CHINA
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