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Method for preparing activated carbon by catalyzing and activating microorganism white-rot fungi or enzymes

A technology for preparing activated carbon and white rot fungi, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of insufficient activation of pretreatment, poor quality of activated carbon products, and high energy consumption in production, so as to shorten the preparation time, The effect of reducing production safety hazards and reducing production energy consumption

Inactive Publication Date: 2012-10-24
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: (1) using water solvent pretreatment to activate the tobacco base material, single physical action on the raw material, insufficient pretreatment activation, resulting in poor quality of activated carbon products
(2) Tobacco base material is soaked in a single chemical reagent, zinc chloride solution. The soaking and stirring time is as long as 2 to 6 hours, and the carbonization temperature of the activated carbon precursor is as high as 500 to 800 ° C, resulting in high production energy consumption, complicated operation and poor safety. high cost

Method used

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  • Method for preparing activated carbon by catalyzing and activating microorganism white-rot fungi or enzymes

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A kind of enzyme catalyzed activation tobacco base prepares the concrete steps of the method for gac as follows:

[0028] (1) Raw material pretreatment.

[0029] Wash 40g of discarded tobacco leaves, dry them, place them in an oven, bake them in an oven at 100°C for 30 minutes, take them out, crush them with a pulverizer, and then sieve them through a 40-mesh molecular sieve to obtain tobacco leaves with a particle size of less than 40 mesh. Pack in separate bags and set aside.

[0030] (2) Preparation of Tobacco Activation Base Material

[0031] After step (1) is completed, the volume (ml) ratio of tobacco solid waste raw material (g) pretreated in step (1):combined enzyme (g):water is 1:0.4:20. The compound enzyme is ligninase: cellulase with a mass ratio of 1:3. In the raw material pretreated in step (1), add compound enzyme and water, stir evenly, then use sulfuric acid solution to adjust the pH value of the system to 7, and then place the mixed solution after adju...

Embodiment 2

[0035] A preparation method of enzyme-catalyzed activated tobacco-based activated carbon, same as Example 1, wherein:

[0036] In the step (1), the selected tobacco mesh is 20 mesh, the oven temperature is 85° C., and the drying time is 90 minutes.

[0037] In step (2), cellulase activation is used to treat waste tobacco. The volume (ml) ratio of tobacco solid waste raw material (g): cellulase (g): water is 1:0.2:5. A sulfuric acid solution was used to adjust the pH of the system to 5, and the temperature of the water bath was 25°C. Enzymolysis activated tobacco base material for 36h.

[0038] In the (3) step, filter residue (being tobacco activation base material) quality (g): the ratio of zinc chloride solution volume (ml) is 1: 6, and the zinc chloride solution mass concentration is 10%, and the impregnation time of intermittent stirring The drying temperature of the filter residue after tobacco impregnation is 85°C, and the drying time of the residue is 2h; the carboniz...

Embodiment 3

[0040] A preparation method of enzyme-catalyzed activated tobacco-based activated carbon, same as Example 1, wherein:

[0041] In the step (1), the selected tobacco mesh is 120 mesh, the oven temperature is 110° C., and the drying time is 20 minutes.

[0042] In step (2), the spent tobacco is treated with ligninase activation. The volume ratio of tobacco solid waste raw material (g): cellulase (g): water (ml) is 1:0.6:30, the pH value of the system is adjusted to 9 with sodium hydroxide solution, and the temperature of the water bath is 40°C. Enzymatically activate the tobacco base material for 6h.

[0043] In the 3rd step, filter residue (being tobacco activated base material) quality (g): the ratio of zinc chloride solution volume (ml) is 1: 3, and the zinc chloride solution mass concentration is 25%, and the impregnation time of intermittent stirring The drying temperature of the filter residue after tobacco impregnation is 100°C, and the drying time of the residue is 0.5...

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Abstract

The invention relates to a method for preparing activated carbon by catalyzing and activating microorganism white-rot fungi or enzymes, which belongs to the technical field of activated carbon preparation. According to the preparation method, tobacco solid waste is used as a raw material, and a product is obtained through simple processes of pretreating the raw material, preparing a tobacco activated base by microorganism white-rot fungi culture or enzyme catalysis and activation and preparing the activated carbon. The method has the characteristics of wide raw material source, low waste utilization cost, low energy consumption in the production process, no secondary pollution, benefit to environmental protection, good adsorptive property and wide application of the activated carbon production, and the like. The method can be widely applied to preparing the activated carbon by taking the tobacco solid waste as a raw material, and the activated carbon prepared by adopting the method provided by the invention can be widely applied to the fields of waste water treatment, removal of SO2 from smoke, adsorption of odors in food fresh keeping, and the like.

Description

technical field [0001] The invention belongs to the technical field of preparing active carbon, and in particular relates to a method for preparing active carbon by activating tobacco base materials with enzyme catalysis. Background technique [0002] Activated carbon has an amorphous structure based on graphite microcrystals. Because of its developed microporous structure, it exhibits excellent adsorption performance. It is an excellent adsorbent widely used in the adsorption treatment of industrial wastewater and organic waste gas. Studies have shown that activated carbon can effectively realize the adsorption of heavy metal ions and cyanide-containing wastewater in wastewater, and SO in flue gas 2 In addition, it is also widely used in special fields such as blood purification, natural gas storage, military chemical protection, adsorption of radioactive elements in the nuclear industry, catalysts and catalyst carriers, and shows excellent adsorption active. [0003] Exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12C01B32/342
Inventor 王星敏郑旭煦胥江河殷钟意伍绍波
Owner CHONGQING TECH & BUSINESS UNIV
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