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Novel bi-metal active carbon-based desulfurization catalyst

A desulfurization catalyst and activated carbon technology, applied in the field of chemical engineering, can solve the problems of low desulfurization capacity and small sulfur capacity, and achieve the effects of high desulfurization capacity, large working sulfur capacity and high space velocity

Inactive Publication Date: 2015-11-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a novel bimetallic activated carbon-based desulfurization catalyst, which aims to solve the problems of low desulfurization capacity and small sulfur capacity of existing commercial carbon-based desulfurization adsorbents

Method used

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  • Novel bi-metal active carbon-based desulfurization catalyst
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  • Novel bi-metal active carbon-based desulfurization catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Put activated carbon (AC) in a beaker, add nitric acid with a mass fraction of 40%, stop adding when the nitric acid is just submerged in AC, seal it, heat it in a water bath at 80°C for 1.5h, then cool, and wash with water until the eluate If it is neutral, filter it with suction, and dry it in a drying oven at 110°C for 12 hours to obtain an acid-treated sample, which is designated as NAC. Weigh 20g of NAC, calculate the required mass of cerium nitrate and nickel nitrate according to the loading amount of Ce and Ni and the law of element conservation, and prepare a certain concentration of cerium nitrate solution and nickel nitrate solution. Mix the cerium nitrate solution and nickel nitrate solution and add it to 20g of NAC, make the liquid just wet the NAC, the mass fraction of Ce is 1%, the mass fraction of Ni is 1%, stir, let it stand overnight and put it in a water bath at 70°C Evaporate dry in pot. Finally, place it in a drying oven at 110°C for 12 hours. Afte...

Embodiment 2

[0031] Put activated carbon (AC) in a beaker, add nitric acid with a mass fraction of 40%, stop adding when the nitric acid is just submerged in AC, seal it, heat it in a water bath at 80°C for 1.5h, then cool, and wash with water until the eluate If it is neutral, filter it with suction, and dry it in a drying oven at 110°C for 12 hours to obtain an acid-treated sample, which is designated as NAC. Weigh 20g of NAC, calculate the required mass of cerium nitrate and nickel nitrate according to the loading amount of Ce and Ni and the law of element conservation, and prepare a certain concentration of cerium nitrate solution and nickel nitrate solution. Mix the cerium nitrate solution and the nickel nitrate solution and add it to 20g of NAC, make the liquid just wet the NAC, the mass fraction of Ce is 3%, the mass fraction of Ni is 1%, stir, and put it in a water bath at 70°C after standing overnight Evaporate dry in pot. Finally, place it in a drying oven at 110°C for 12 hours....

Embodiment 3

[0033] Put activated carbon (AC) in a beaker, add nitric acid with a mass fraction of 40%, stop adding when the nitric acid is just submerged in AC, seal it, heat it in a water bath at 80°C for 1.5h, then cool, and wash with water until the eluate If it is neutral, filter it with suction, and dry it in a drying oven at 110°C for 12 hours to obtain an acid-treated sample, which is designated as NAC. Weigh 20g of NAC, calculate the required mass of cerium nitrate and nickel nitrate according to the loading amount of Ce and Ni and the law of element conservation, and prepare a certain concentration of cerium nitrate solution and nickel nitrate solution. Mix cerium nitrate solution and nickel nitrate solution and add to 20g of NAC, make the liquid just wet the NAC, the mass fraction of Ce is 5%, the mass fraction of Ni is 1%, stir, let it stand for one night and put it in a water bath at 70°C Evaporate dry in pot. Finally, place it in a drying oven at 110°C for 12 hours. After d...

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Abstract

The invention discloses a novel bi-metal active carbon-based desulfurization catalyst. The novel bi-metal active carbon-based desulfurization catalyst is obtained with active carbon pretreated with nitric acid with a mass fraction of 40% as the carrier, Ni with a mass fraction of 1% as the basic active component, and Ce with a mass fraction of 1-9% as the second active component; an active component precursor is loaded onto the active carbon with the impregnation method, and then the novel bi-metal active carbon-based desulfurization catalyst is obtained through heat treatment. Calcination temperature is 500-900 DEG C, and high-purity nitrogen serves as protective gas in the calcination process. The novel bi-metal active carbon-based desulfurization catalyst has the advantages of being high in SO2 removal capacity, high in working sulfur capacity, wide in applicable smoke temperature range, adaptable to a large SO2 concentration range, high in space velocity and the like, and working sulfur capacity reaches 37-97 mgSO2 / g when reaction space velocity is 3000h<-1>, bed temperature is 110 DEG C, SO2 inlet concentration is about 2200 ppm, O2 content is 10%, and vapor content is 10.4%.

Description

technical field [0001] The invention belongs to the field of chemical engineering, in particular to a novel bimetallic activated carbon-based desulfurization catalyst. Background technique [0002] Commercial carbon-based desulfurization adsorbents generally have well-developed pore structures and various functional groups. 2 The active center for adsorption and catalytic oxidation is provided, and its preparation generally takes into account factors such as the difficulty of regeneration, mechanical strength, raw material source and selling price, and usually improves its adsorption capacity and sulfur capacity by improving its pore structure and surface chemical properties. . The preparation of the carbon-based desulfurization adsorbent in the prior art mainly includes two methods at present, one is to load the active component metal ions on the activated carbon by impregnation, and the other is to combine the active component, the carrier and the binder Agents, etc. are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01D53/86B01D53/50
Inventor 郭家秀尹华强楚英豪李建军刘勇军王雪娇梁晓勇
Owner SICHUAN UNIV
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