Preparation method of lignin carbon film for adsorbing H2S

A technology of lignin and alkali lignin, which is applied in the field of preparation of deodorizing materials, can solve the problems of inability to serve as a structural support, brittle carbon film, and brittleness, etc., and achieves good deodorization effect, sufficient raw materials, and little environmental pollution.

Active Publication Date: 2021-09-17
HARBIN UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

[0010]However, the prepared carbon membrane is brittle and fragile, and cannot be used as a structural support, resulting in research on its application and functionalization in large-scale membrane modules. limit
[0011]There are many studies on the preparation of alkali lignin materials, but there are few researches and developments on lignin carbon and membrane materials for H2S adsorption , some of the literature is given below as a reference

Method used

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  • Preparation method of lignin carbon film for adsorbing H2S
  • Preparation method of lignin carbon film for adsorbing H2S

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preparation example Construction

[0032] A preparation method of lignin carbon film is characterized in that: preparation of alkali lignin carbon film, preparation of film-making liquid and solution casting film-forming process are composed of the following steps:

[0033] Step 1: put the alkali lignin into a tubular resistance furnace, and carbonize the alkali lignin under the protection of nitrogen. The heating rate of the resistance furnace is 5°C / min-8°C / min, and the carbonization temperature is 350°C-400°C , the carbonization time is 90min to 100min, and the carbonized material is cooled under the nitrogen protection at 5°C / min, cooled to room temperature and removed from the tubular resistance furnace to obtain alkali lignin charcoal;

[0034] Step 2, preparing a polyvinyl alcohol aqueous solution with a mass concentration of 3.0% to 5.0%, mixing alkali lignin charcoal, polyvinyl alcohol aqueous solution, and water according to the solid-to-liquid ratio (g:mL:mL) 3:50:50 to 5: Mix and stir at 50:150 for ...

example 1

[0039] Put 1g of alkali lignin in a magnetic boat, put it into a tube-type resistance furnace, and carry out carbonization treatment on alkali lignin under the protection of nitrogen. After 100 min, the carbonized material was cooled under nitrogen protection at 5°C / min, cooled to room temperature and removed from the tubular resistance furnace to obtain alkali lignin charcoal; a polyvinyl alcohol aqueous solution with a mass concentration of 5.0% was prepared; 0.3 g of alkali Put lignin charcoal, 5mL 5% polyvinyl alcohol aqueous solution and 15mL water into a beaker, mix and stir for 4 hours, then add 0.1mL glycerin and continue stirring for 2 hours, and obtain the film-forming solution after the stirring; quickly pour the film-forming solution into 9 In a plastic petri dish of ×9cm, let it stand for 2 hours for defoaming. After defoaming, place it in a vacuum drying oven for drying at 70°C for 6 hours. The lignin carbon film was peeled off from the dish to obtain a lignin ca...

example 2

[0042]Put 1g of alkali lignin in a magnetic boat, put it into a tubular resistance furnace, and carry out carbonization treatment on alkali lignin under the protection of nitrogen. The heating rate is 5°C / min, the carbonization temperature is 400°C, and the carbonization time is 95min. After carbonization, the material was cooled under a nitrogen protection program at 5°C / min, cooled to room temperature and removed from a tubular resistance furnace to obtain alkali lignin charcoal; a polyvinyl alcohol aqueous solution with a mass concentration of 5.0% was prepared; 0.4g alkali lignin Put charcoal, 5mL of 5% polyvinyl alcohol aqueous solution and 10mL water into a beaker, mix and stir for 4 hours, then add 0.15mL glycerin and continue to stir for 2 hours, and obtain the film-forming solution after stirring; quickly pour the film-forming solution into 9× In a 9cm plastic petri dish, let it stand for 2 hours for defoaming. After defoaming, put it in a vacuum drying oven for drying...

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Abstract

The invention belongs to the field of preparation of deodorization materials, and particularly relates to a preparation method of a lignin carbon film for adsorbing H2S. The method comprises the following steps: carbonizing alkali lignin at high temperature to obtain alkali lignin carbon; mixing the alkali lignin carbon, water, polyvinyl alcohol and glycerol according to a certain proportion to prepare a film preparation solution; and finally, casting the film preparation liquid onto a culture dish by using a solution casting method, and drying to obtain a final product. The method has the advantages that the process is simple, the lignin carbon film can adsorb H2S and is good in effect, the raw materials of the film are alkali lignin, polyvinyl alcohol and water, the preparation cost is low, meanwhile, a new thought is provided for high-value resource utilization of lignin, and the method is suitable for industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of preparation of deodorizing materials, and in particular relates to a 2 S lignin carbon film preparation method. Background technique [0002] At present, there are many types of malodorous gases emitted during production, which have become the focus of environmental complaints. [0003] h 2 S is the main component in malodorous gas. For the control of odor pollution, the adsorption method is widely used because of its simple operation and reliable operation. [0004] At present, the adsorbents used for the adsorption of malodorous substances are mainly granular materials such as activated carbon. During the use of such materials, due to the impact of air flow, they are prone to breakage, which increases the air resistance of the packed bed of the adsorption tower and affects normal industrial production. [0005] In addition, the packed bed of the adsorption tower is mostly used for the treatment of organized em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02
CPCB01J20/20B01J20/28033B01D53/02B01J2220/4837B01D2257/304Y02C20/40
Inventor 李芬李友婧杨莹丁为民郑梦龙
Owner HARBIN UNIV OF SCI & TECH
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