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Method for preparing catalyst for removing SO2 and NO out of cigarette smoke

A catalyst and cigarette technology, applied in the field of cigarette exhaust gas purification, can solve the problem of less catalysts and preparation methods, and achieve the effects of uniform size, simple operation process, and detailed and accurate data.

Inactive Publication Date: 2015-01-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some technologies for removing harmful gases such as NO and CO in cigarettes have appeared in China. However, for the removal of SO in cigarette smoke 2 However, there are very few catalysts and preparation methods, which is also a technical gap that needs to be filled urgently.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 10g of activated carbon powder into 50ml of deionized water to obtain a mixed solution, heat it to 80°C-90°C, stir for 1.5h, and filter it with suction to obtain a mixed solid;

[0023] Select 25ml of hydrochloric acid solution with a mass ratio of 4mg / L, add the mixed solid to it, heat to 80°C-90°C, stir for 1.5h, then let it stand for 3h, and perform suction filtration to obtain an acid-washed solid;

[0024] Select 25ml of sodium hydroxide solution with a mass ratio of 5mg / L, add the acid-washed solid into it, heat it to 80°C-90°C, stir for 1-1.5h, then let it stand for 3h, and obtain the alkali-washed solid after suction filtration, and then Wash the obtained alkali-washed solid with deionized water until the pH of the final washing solution is 8-9;

[0025] The alkali-washed solid obtained after washing is put into a constant temperature oven at 80°C to 90°C and dried to constant weight to obtain pretreated activated carbon powder;

[0026] After mixing 5g of ...

Embodiment 2

[0034] Add 10g of activated carbon powder into 50ml of deionized water to obtain a mixed solution, heat it to 80°C-90°C, stir for 1.5h, and filter it with suction to obtain a mixed solid;

[0035] Select 25ml of hydrochloric acid solution with a mass ratio of 5mg / L, add the mixed solid into it, heat it to 80°C-90°C, stir for 1.5h, then let it stand for 3h, and perform suction filtration to obtain an acid-washed solid;

[0036] Select 25ml of sodium hydroxide solution with a mass ratio of 6mg / L, add the acid-washed solid into it, heat it to 80°C-90°C, stir for 1-1.5h, then let it stand for 3h, obtain the alkali-washed solid after suction filtration, and then Wash the obtained alkali-washed solid with deionized water until the pH of the final washing solution is 8-9;

[0037] The alkali-washed solid obtained after washing is put into a constant temperature oven at 80°C to 90°C and dried to constant weight to obtain pretreated activated carbon powder;

[0038] After mixing 7.5g of...

Embodiment 3

[0046] Add 10g of activated carbon powder into 50ml of deionized water to obtain a mixed solution, heat it to 80°C-90°C, stir for 1.5h, and filter it with suction to obtain a mixed solid;

[0047] Select 25ml of hydrochloric acid solution with a mass ratio of 4mg / L, add the mixed solid to it, heat to 80°C-90°C, stir for 1.5h, then let it stand for 3h, and perform suction filtration to obtain an acid-washed solid;

[0048] Select 25ml of sodium hydroxide solution with a mass ratio of 5mg / L, add the acid-washed solid into it, heat it to 80°C-90°C, stir for 1-1.5h, then let it stand for 3h, and obtain the alkali-washed solid after suction filtration, and then Wash the obtained alkali-washed solid with deionized water until the pH of the final washing solution is 8-9;

[0049] The alkali-washed solid obtained after washing is put into a constant temperature oven at 80°C to 90°C and dried to constant weight to obtain pretreated activated carbon powder;

[0050] After mixing 10 g o...

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Abstract

The invention relates to a method for preparing a catalyst for removing SO2 and NO out of cigarette smoke. The catalyst of activated carbon loaded with vanadium pentoxide is prepared from activated carbon and ammonium metavanadate by the following steps of mixture liquid preparation, ultrasonic dispersion and pyrolysis. The catalyst takes activated carbon as a carrier, takes vanadium pentoxide as an activated component, and can be used for removing high-concentration SO2 and NO out of cigarette smoke; vanadium pentoxide granules in the catalyst are uniform in size and dispersed uniformly, can remove SO2 and NO out of cigarette smoke rapidly after coming into contact with cigarette smoke, and has certain catalytic activity at the temperature being higher than 60 DEG C. The preparation method provided by the invention is short in technology process, is simple and convenient in operation technology and has the advantages that the material sources are abundant is are proportioned reasonably, data are full and accurate and product stability is good; and therefore the method is a very ideal preparation method of the catalyst for removing harmful substances out of cigarette smoke.

Description

technical field [0001] The invention relates to a method for removing SO in cigarette smoke 2 The invention relates to a preparation method of a catalyst for NO and NO, belonging to the field of cigarette exhaust gas purification. Background technique [0002] Cigarette smoke contains a variety of harmful chemical substances, and the common cellulose acetate filters currently on the market can remove some harmful substances in particulate phase to varying degrees. In addition, some filters made of special materials have also been applied. For example, activated carbon filters can selectively remove more than 20 harmful smoke components; zeolite filter materials can selectively adsorb nitrosamines and reduce carcinogens in smoke. ; The filter tip of catalytic material containing nano-precious metal can reduce the CO in the flue gas. However, the gas phase constituents of cigarette smoke contain high concentrations of SO 2 , NO and other harmful gas components, and the conc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22B01D53/86B01D53/60
CPCY02A50/20
Inventor 任军李飞林建英王伟李忠
Owner TAIYUAN UNIV OF TECH
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