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Preparation method of cigarette end biochar material for selectively adsorbing ammonia in smoke

A selective and biochar technology, applied in the field of preparation of cigarette butt biochar materials, can solve the problems of costing money and material resources, failing to achieve ammonia adsorption, poor ammonia adsorption effect, etc., reducing pollution, improving adsorption, active sites, etc. added effect

Active Publication Date: 2021-01-05
CHINA TOBACCO JIANGSU INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nowadays, the output of cigarette butts left by people smoking is very large and needs to be recycled in large quantities. In some places, they are even directly buried. Carbon material adsorbents can not only recycle these wastes, have extremely high economic benefits, but also protect the environment and have sustainable development
[0005] However, the biochar material prepared with cigarette butts as the substrate has a poor adsorption effect on ammonia in mainstream smoke. If other adsorbents are used together to absorb ammonia in mainstream smoke, other components in the smoke will be easily absorbed. , cannot achieve the purpose of ammonia adsorption, therefore, the cigarette butt biochar material can be improved to strengthen its adsorption effect on ammonia in mainstream smoke, and at the same time ensure the singleness of its adsorption

Method used

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  • Preparation method of cigarette end biochar material for selectively adsorbing ammonia in smoke
  • Preparation method of cigarette end biochar material for selectively adsorbing ammonia in smoke

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Clean up the shredded tobacco and paper on the surface of the discarded cigarette butts, add it to an aqueous sodium hydroxide solution at 25°C and stir for 1 hour, then filter and dry to obtain a solid sample for later use;

[0034] Weigh 2g of the solid sample prepared in the above steps with 1g of thiocyanuric acid and 1g of CaCl 2 Put them together in a ball mill and grind them into mixed powder;

[0035] The mixed powder prepared in the above steps was transferred to a tube furnace and calcined under the protection of nitrogen gas. The calcining temperature was 400° C. and the calcining time was 4 h. After the calcining was completed, it was naturally cooled, and then washed with a mixed solution of ultrapure water and ethanol for 5 Second, dry the sulfur-calcium double-doped biochar material.

Embodiment 2

[0037] Clean up the shredded tobacco and paper on the surface of the discarded cigarette butts, add it to an aqueous sodium hydroxide solution at 25°C and stir for 1 hour, then filter and dry to obtain a solid sample for later use;

[0038] Weigh 2g of the solid sample prepared in the above steps with 1g of thiocyanuric acid and 1g of CaCl 2 Put them together in a ball mill and grind them into mixed powder;

[0039] The mixed powder prepared in the above steps was transferred to a tube furnace and calcined under the protection of nitrogen gas. The calcining temperature was 500°C and the calcining time was 4 hours. Second, dry the sulfur-calcium double-doped biochar material.

Embodiment 3

[0041] Clean up the shredded tobacco and paper on the surface of the discarded cigarette butts, add it to an aqueous sodium hydroxide solution at 25°C and stir for 1 hour, then filter and dry to obtain a solid sample for later use;

[0042] Weigh 2g of the solid sample prepared in the above steps with 1g of thiocyanuric acid and 1g of CaCl 2 Put them together in a ball mill and grind them into mixed powder;

[0043] The mixed powder prepared in the above steps was transferred to a tube furnace and calcined under the protection of nitrogen gas. The calcining temperature was 600°C and the calcining time was 4 hours. Second, dry the sulfur-calcium double-doped biochar material.

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Abstract

The invention discloses a preparation method of a cigarette end biochar material for selectively adsorbing ammonia in smoke, which comprises the following steps: cleaning waste cigarette ends, addinginto a sodium hydroxide water solution, stirring and filtering the mixture, and drying the material to obtain a solid sample for later use; putting the solid sample prepared in the previous step together with a certain amount of trithiocyanuric acid and CaCl2 into a ball mill to be milled into mixed powder; transferring the mixed powder prepared in the previous step into a tubular furnace, calcining under the protection of inert gas, naturally cooling after calcining is completed, then washing the material with a mixed solution of ultrapure water and ethanol for multiple times, and drying thematerial to obtain the sulfur-calcium co-doped biochar material. The sulfur-calcium co-doped biochar material prepared by the method has many active sites, large specific surface area and good adsorption effect on ammonia, and waste cigarette butts can also generate more oxygen-containing functional groups in the calcining process; the functional groups can generate electrostatic adsorption, ion exchange and hydrogen bond attraction, so that the adsorption effect of the sulfur-calcium double-doped biochar material on ammonia is greatly improved.

Description

technical field [0001] The invention relates to the field of biochar material modification, in particular to a method for preparing a cigarette butt biochar material which selectively absorbs ammonia in flue gas. Background technique [0002] Ammonia (Ammonia, that is, ammonia), is a compound of nitrogen and hydrogen, the molecular formula is NH 3 , is a colorless gas with a strong pungent odor. It is easily soluble in water, and 1 volume of water can dissolve 700 times the volume of ammonia under normal temperature and pressure. The aqueous solution is also called ammonia water. It can be turned into a liquid by cooling and pressurizing, and liquid ammonia is a refrigerant. Ammonia is also an important raw material for the manufacture of nitric acid, fertilizers, and explosives. Ammonia is also a direct or indirect constituent of all medicines. Ammonia has a wide range of uses, but it also has dangerous properties such as corrosiveness. Ammonia is a naturally occurring...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02
CPCB01J20/20B01J20/045B01J20/28057B01D53/02B01J2220/4887B01D2257/406Y02A50/20
Inventor 李炜吴洋兰叶青张继光
Owner CHINA TOBACCO JIANGSU INDAL
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