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Method for preparing carbon-based material from waste shredded tobacco and application of carbon-based material

A technology of carbon-based materials and shredded tobacco, which is applied in the application field of carbon-based materials, and can solve the problems of intensified secondary reactions, complicated steps, and increased costs

Active Publication Date: 2021-07-09
HUBEI CHINA TOBACCO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steps of this method are relatively complicated, and the feasibility in the operation process is not good.
Due to the low heating rate of 5-10 ℃ / min in the process of heating activated carbon, the secondary reaction between volatile components in tobacco is intensified during the process of heating activated carbon, and small molecular organic compounds volatilize The interaction between the components generates macromolecular organic matter, which blocks the pore structure of the activated carbon, and the specific surface area and porosity of the activated carbon are relatively low, which makes the method require multiple heating and multiple activations, resulting in The cost increases, and multiple hydrochloric acid activations result in a large amount of waste acid liquid, resulting in an increase in the cost of waste liquid treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] S1. Crushing the waste shredded tobacco of a certain type of heat-not-burn cigarette, the particle size of shredded tobacco is 2 cm after crushing;

[0033]S2. Place the pulverized shredded tobacco in the reaction vessel of the light heating reactor, seal the reactor, and pass through an inert atmosphere, set the heating rate of the preliminary pyrolysis of shredded tobacco to 100 °C / min, and the final temperature of pyrolysis to 600 °C, keep warm The time is 10 min to complete the pyrolysis carbonization process on the surface of cut tobacco;

[0034] S3. Fully mix the shredded tobacco primary charcoal initially pyrolyzed by the light heating reactor, add it into the microwave pyrolysis reactor, seal the reactor, and set the power of the microwave pyrolysis reactor to 0.1×10 5 W / m 3 , the reaction temperature is 600 ℃, the holding time is 10 min, and the activated carbon on the surface of cut tobacco prepared in a light heating reactor is used as a microwave absorbin...

Embodiment 2

[0037] S1. Pulverize the waste shredded tobacco of a certain type of heat-not-burn cigarette, and the particle size of shredded tobacco after crushing is 1.5 cm;

[0038] S2. Place the pulverized shredded tobacco in the reaction vessel of the light heating reactor, seal the reactor, and pass through an inert atmosphere, set the heating rate of the preliminary pyrolysis of shredded tobacco to 20°C / min, and the final temperature of pyrolysis to 500°C, keep warm The time is 7 minutes to complete the pyrolysis and carbonization process on the surface of cut tobacco;

[0039] S3. Fully mix the shredded tobacco primary charcoal initially pyrolyzed by the light heating reactor, add it into the microwave pyrolysis reactor, and pass through the inert atmosphere, seal the reactor, and set the power of the microwave pyrolysis reactor to 0.5×10 5 W / m 3 , the reaction temperature is 500 ℃, and the holding time is 5min. Using the activated carbon on the surface of cut tobacco prepared in ...

Embodiment 3

[0042] S1. Pulverize the waste shredded tobacco of a certain type of heat-not-burn cigarette, and the particle size of shredded tobacco after shredding is 1 cm;

[0043] S2. Place the pulverized shredded tobacco in the reaction vessel of the light heating reactor, seal the reactor, and pass through an inert atmosphere, set the heating rate of the preliminary pyrolysis of shredded tobacco to 200 °C / min, and the final temperature of pyrolysis to 700 °C, keep warm The time is 5 minutes to complete the pyrolysis and carbonization process on the surface of cut tobacco;

[0044] S3. Fully mix the shredded tobacco primary charcoal initially pyrolyzed by the light heating reactor, add it into the microwave pyrolysis reactor, seal the reactor, and set the power of the microwave pyrolysis reactor to 5×10 5 W / m 3 , the reaction temperature is 550 ℃, and the holding time is 7min. Using the activated carbon on the surface of cut tobacco prepared in a light-heating reactor as a microwave ...

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PUM

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Abstract

The application discloses a method for preparing carbon-based materials from waste shredded tobacco and applications of the carbon-based materials. In the method of the present application, waste shredded tobacco is used as a raw material, which is firstly heated by light and then heated by microwaves to obtain faster or more efficient heating, thereby ensuring the BET specific surface area of ​​the prepared carbon-based material. Using the carbon-based material prepared in this application as a filter stick adsorption material can improve the characteristic aroma intensity and long-lasting stability of new tobacco; or it can be applied to cigarette filter sticks to absorb and filter harmful components of smoke, and realize the greening of waste shredded tobacco. , harmless treatment and high-value chemical benefits, it can be used as an adsorbent for aroma components in heating and non-burning shredded tobacco.

Description

technical field [0001] The invention relates to the technical field of tobacco treatment, in particular to a method for preparing carbon-based materials from waste shredded tobacco and the application of the carbon-based materials. Background technique [0002] Heat-not-burn cigarettes are new types of tobacco products that use a special heat source to heat shredded tobacco, and when heated, the nicotine and flavoring substances in the shredded tobacco volatilize to produce smoke for consumers to smoke. During the use of heat-not-burn, only the volatile and semi-volatile components in the shredded tobacco are released during the heating process, and the rest of the ingredients are retained in the shredded tobacco. The waste shredded tobacco still contains more carbohydrates and other carbon-containing substances. Its utilization potential is great. [0003] Chinese patent CN 109911895 A discloses a preparation method of tobacco-based modified activated carbon. The method ai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05C01B32/324A24D3/16
CPCA24D3/163C01B32/05C01B32/324
Inventor 魏敏宋旭艳李冉胡红云潘曦杨福高强
Owner HUBEI CHINA TOBACCO IND