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Method for preparing mesoporous carbon material by catalytically activating sodium lignin sulfonate with organic sylvite

A technology of sodium lignosulfonate and catalytic activation, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve problems such as waste of resources, and achieve the effects of convenient production and processing, high specific area, and good application prospects

Inactive Publication Date: 2020-03-24
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, more than 95% of kraft lignin is currently used as fuel, concentrated and burned, resulting in a waste of resources

Method used

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  • Method for preparing mesoporous carbon material by catalytically activating sodium lignin sulfonate with organic sylvite
  • Method for preparing mesoporous carbon material by catalytically activating sodium lignin sulfonate with organic sylvite
  • Method for preparing mesoporous carbon material by catalytically activating sodium lignin sulfonate with organic sylvite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: A method for preparing mesoporous carbon material by organic potassium catalyzed activation of sodium lignosulfonate, using a magnetic stirrer with a concentration of 50% potassium tartrate solution and sodium lignosulfonate at an impregnation ratio of 2:1 Mix well, control the pH value of the solution at 6.5, then dry the solution at 155°C with a spray drying device to remove moisture to form a sodium lignosulfonate / potassium tartrate dry powder raw material, and then put the completely dried dry powder raw material into a tube furnace , under a nitrogen atmosphere (that is, the protective gas is nitrogen), the temperature was raised from 25°C to 800°C at a rate of 13°C / min, and activated at a constant temperature at this temperature for 1.8h. After activation, it was lowered to room temperature, and the sample obtained after activation was taken out. Wash with deionized water to remove impurities, then repeatedly wash with deionized water until the pH value ...

Embodiment 2

[0023] Embodiment 2: A method for preparing mesoporous carbon material by organic potassium catalyzed activation of sodium lignosulfonate, using a magnetic stirrer with a concentration of 50% potassium tartrate solution and sodium lignosulfonate with an impregnation ratio of 4:1 Mix evenly, control the pH value of the solution at 7.5, then dry the solution at 160°C with a spray drying device to remove moisture to form a sodium lignosulfonate / potassium tartrate dry powder raw material, and then put the completely dried dry powder raw material into a tube furnace , in a nitrogen atmosphere, the temperature was raised from 35°C to 800°C at a rate of 18°C / min, and activated at this temperature for 1.8h at a constant temperature. After activation, it was lowered to room temperature, and the sample obtained after activation was taken out and washed with deionized water to remove impurities. , and then repeatedly washed with deionized water until the pH value was 7, and finally dried ...

Embodiment 3

[0024] Example 3: A method for preparing mesoporous carbon material by organic potassium catalyzed activation of sodium lignosulfonate, using a magnetic stirrer with a concentration of 50% potassium tartrate solution and sodium lignosulfonate at an impregnation ratio of 3:1 Mix well, control the pH value of the solution at 7, and then use a spray drying device to dry the solution at 160°C to remove moisture to form a sodium lignosulfonate / activator dry powder raw material, and then put the dry powder raw material into a tube furnace, under nitrogen Under the atmosphere, the temperature was raised from 30°C to 800°C at a heating rate of 15°C / min, and activated at this temperature for 1.5 hours at a constant temperature. After activation, it was lowered to room temperature. The deionized water was washed repeatedly until the pH value was 7, and finally dried at 60°C to remove water to obtain a mesoporous carbon material.

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Abstract

The invention discloses a method for preparing a mesoporous carbon material by catalytically activating sodium lignin sulfonate with organic sylvite. An organic sylvite activator and sodium lignin sulfonate are uniformly mixed at an impregnation ratio of 1: (2-4) by a stirrer, and the pH value of the solution is controlled to be 6.0 to 8.0; the solution is dried at 150-170 DEG C to remove moistureto form a sodium lignin sulfonate / activator dry powder raw material; the dry powder raw material is put into a tubular furnace, the furnace is heated from 30 DEG C to 700-900 DEG C at a heating rateof 10-20 DEG C / min in a nitrogen atmosphere, constant-temperature activation is performed on the material at the temperature for 1-2h, and the furnace is cooled to room temperature after activation; and a sample obtained after activation is taken out and washed with deionized water to remove impurities, the sample is repeatedly washed with deionized water until the pH value is 7, and finally, thesample is dried at 55-65 DEG C to remove water, thereby obtaining the mesoporous carbon material. The lignin-based mesoporous carbon material is prepared from organic sylvite as an activator and sodium lignin sulfonate. The mesoporous carbon material is convenient to produce and process, and the prepared mesoporous carbon material has the characteristics of a large number of mesopores and large specific surface area.

Description

technical field [0001] The invention relates to the field of preparation of porous carbon materials, in particular to a method for preparing mesoporous carbon materials by catalyzing and activating sodium lignosulfonate with organopotassium. Background technique [0002] Porous carbon materials are carbon materials with different size structures and interpenetrating or closed pores made by carbonization or activation of carbon-containing compounds. The pore size distribution can be adjusted by selecting the type of carbon precursor and changing the carbonization or activation conditions. Porous carbon materials not only have stable chemical properties, good thermal and electrical conductivity, and low price, but also have the advantages of large specific surface area, high porosity, uniform pore structure, and adjustable pore size distribution. Therefore, porous carbon materials are widely used in energy storage, separation and purification, catalysis, biomedicine, optical d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/318
CPCC01B32/318C01B32/348
Inventor 郭大亮吴锦涵沙力争刘蓓陈华张欣袁康帅
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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