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A kind of method and application of preparing activated carbon by using juncao lignin

A technology for preparing activated carbon and giant juncao, which is applied in the direction of lignin derivatives, chemical instruments and methods, non-metallic elements, etc., can solve the problems of high-value utilization of wood fibers, achieve enhanced impregnation effect, and shorten reaction time , Improve the effect of specific surface area

Active Publication Date: 2018-06-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, giant bacteria are mainly used as fungi culture material, cattle and sheep feed, biomass fuel power generation or used in fiberboard manufacturing, etc., and its rich wood fiber has not been used for high-value utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Extraction and pretreatment with benzene-alcohol and hot water, and sieve through a sample sieve to obtain 40-60 mesh giant Juncao grass powder. Cellulose, hemicellulose and lignin were extracted by microwave-alkali-alcohol method.

[0037] The specific extraction steps are as follows: (1) Raw material pretreatment: pulverize the air-dried giant fungus grass, and obtain 40-60 mesh grass powder through a sample sieve, add 150mL benzene-alcohol mixture to the Soxhlet extractor, and the Extract from grass powder for 5-7h for dewaxing, add water to the dewaxed Jujuncao at a mass ratio of 1: (20-30), wherein the mass of Jujuncao is 10g, extract at 80-90°C After 2-4 hours, the protein and pectin in the giant juncao are further removed, filtered, and dried to obtain the pretreated giant juncao, and then passed through a 40-60 mesh sieve to obtain a giant juncao powder.

[0038] Wherein, the benzene-alcohol mixed solution is a mixed solution of toluene and ethanol at a volume ...

Embodiment 2

[0046] According to the impregnation ratio of 3:1, impregnate the hydrothermal coke with 85% phosphoric acid (the preparation method of the hydrothermal coke is the same as that in Example 1). After fully stirring and impregnating for 2 hours, the impregnated hydrothermal coke was dried at 90°C. The dried product was transferred to a tube-type resistance furnace, and the temperature was raised to 450°C at a heating rate of 10°C / min, and the activation reaction was maintained for 1.5 hours. After reaching the reaction time, it was naturally cooled to room temperature. The entire activation and cooling process was carried out in a nitrogen atmosphere. The obtained solid was ground in a mortar, activated with 1 mol / L HCl solution for 1 h while boiling, filtered, the filtrate was washed with deionized water until neutral, and dried at 105°C to obtain activated carbon. Its specific surface area and total pore volume reached the largest, respectively 1806m 2 / g and 1.12cm 3 / g, ...

Embodiment 3

[0049] According to the impregnation ratio of 2:1, impregnate the hydrothermal coke with 75% phosphoric acid (the preparation method of the hydrothermal coke is the same as that in Example 1). After fully stirring and impregnating for 1.5 hours, the impregnated hydrothermal coke was dried at 90°C. The dried product was transferred to a tube-type resistance furnace, and the temperature was raised to 350°C at a heating rate of 10°C / min, and the activation reaction was maintained for 1.5 hours. After reaching the reaction time, it was naturally cooled to room temperature. The entire activation and cooling process was carried out in a nitrogen atmosphere. The obtained solid was ground in a mortar, activated with 1 mol / L HCl solution for 1 h while boiling, filtered, the filtrate was washed with deionized water until neutral, and dried at 105°C to obtain activated carbon. Its specific surface area and total pore volume reached the largest, respectively 1756m 2 / g and 1.05cm 3 / g...

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PUM

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Abstract

The present invention discloses a method for using pennisetum hydridum lignin for preparation of active carbon and application of the active carbon, the method comprises the following steps: hydrothermal coke can be prepared from the pennisetum hydridum lignin as a raw material by a hydrothermal method, the hydrothermal coke is impregnated with a solution of phosphoric acid, then the impregnated hydrothermal coke is put into a muffle furnace for carbonization, and finally the impregnated hydrothermal after the carbonization is activated by a hydrochloric acid solution, washed and dried to obtain the active carbon. The active carbon prepared from a pennisetum hydridum waste residue is just suitable for detoxification and decoloration of a hydrolyzate after pennisetum hydridum hydrolysis due to the pore size of the active carbon, and compared with the decolorization effect of purchased commodity active carbon, the decolorization effect of the active carbon is better.

Description

technical field [0001] The invention belongs to the field of activated carbon preparation, and in particular relates to a method for preparing activated carbon by using the lignin of phalaenopsis as well as the activated carbon and its application. Background technique [0002] Activated carbon is widely used in industrial fields because of its high porosity, strong adsorption capacity and easy recycling. Jujun grass is also known as king grass, emperor bamboo grass, giant elephant grass, also known as power generation grass and energy grass. The grass has the characteristics of fast growth, tall plants, high yield, perennial, etc. It is the highest yielding tropical herbage in my country. After testing, the cellulose content of giant fungus grass with a growth period of more than half a year can reach 25-43%, the hemicellulose content can reach 20-32%, and the lignin content can reach 10-13%, so it is an excellent fiber raw material. substance. At present, giant bacteria...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/14D21C5/00C07G1/00C01B32/318C01B32/342
CPCC01P2006/12C01P2006/14C01P2006/16C07G1/00C08B37/14D21C5/00
Inventor 陈嘉川田中建杨桂花吉兴香朱北平周凯旋
Owner QILU UNIV OF TECH
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