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Preparation of activated carbon-based catalyst used for selective reduction desulphurization of flue gas

A catalyst and selective technology, applied in the field of flue gas removal of SO2

Active Publication Date: 2012-02-22
SHANDONG QINGYUAN GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there is no catalyst prepared by supported activated carbon in the literature to catalyze the reduction of SO by CO. 2 Report on Recycling Sulfur into Elemental Sulfur

Method used

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  • Preparation of activated carbon-based catalyst used for selective reduction desulphurization of flue gas
  • Preparation of activated carbon-based catalyst used for selective reduction desulphurization of flue gas
  • Preparation of activated carbon-based catalyst used for selective reduction desulphurization of flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Modification of activated carbon carrier: Soak coconut shell activated carbon with a particle size of 40-60 mesh in deionized water for 24 hours, then wash with deionized water several times, and then dry at 110°C for 12 hours. Activated carbon after drying with 2.5w% HNO 3 Carrier 1 was obtained by oxidizing at 90°C for 6 hours and drying at 110°C for 12 hours. The specific surface area of ​​the obtained carrier is 1900m 2 / g.

[0018] Preparation of the catalyst: 101 g of ferric nitrate was dissolved in 210 mL of water to obtain an impregnation solution 1. Using equal-volume impregnation, impregnate 100 g of the above-mentioned carrier with 210 mL of the impregnation solution for 2 h, and dry at a constant temperature of 110 ° C for 12 h, and then the obtained catalyst precursor N 2 Calcined at 500°C for 5h under atmosphere to obtain catalyst sample A 1 .

Embodiment 2

[0020] Modification of activated carbon carrier: Soak coconut shell activated carbon with a particle size of 40-60 mesh in deionized water for 24 hours, then wash with deionized water several times, and then dry at 110°C for 12 hours. Activated carbon after drying with 5w% HNO 3 Carrier 2 was obtained by oxidizing at 90°C for 6 hours and drying at 110°C for 12 hours. The specific surface area of ​​the obtained carrier is 2045m 2 / g.

[0021] Catalyst preparation: 210 mL of impregnation solution 1 was prepared according to the same method as in Example 1. Using equal-volume impregnation, impregnate 100 g of the above-mentioned carrier with 210 mL of the impregnation solution for 2 h, and dry at a constant temperature of 110 ° C for 12 h, and then the obtained catalyst precursor N 2 Calcined at 500°C for 5h under atmosphere to obtain catalyst sample A 2 .

Embodiment 3

[0023] Dissolve 77.86g of nickel nitrate in 210mL of water to obtain immersion solution 2. Using the method of equal volume impregnation, 100 g of the carrier 2 obtained in Example 2 was impregnated with 210 mL of the impregnation solution for 2 h, and dried at a constant temperature of 110 ° C for 12 h, and then the obtained catalyst precursor N 2 Calcined at 500°C for 5h under atmosphere to obtain catalyst sample A 3 .

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Abstract

Belonging to the technical field of sulfur recovery, the invention relates to a catalyst for selective reduction desulphurization, its preparation method and application. The catalyst is characterized in that: a catalyst active component is loaded on a carrier by means of an isometric immersion method, a multiple immersion method and an immersion precipitation method so as to obtain the catalyst; the catalyst carrier consists of coconut-shell activated carbon, fruit-shell activated carbon and coal-based activated carbon; the oxidation modifier of the catalyst carrier is one or a mixture of any of chloric acid, nitric acid, hydrogen peroxide or concentrated sulfuric acid; the active component of the catalyst is one or a mixture of any of CuO, NiO, Fe2O3, ZnO, Cr2O3, Co2O3, MnO2, and V2O5. The desulfurizer of the invention employs a selective reduction desulphurization technology to convert SO2 in flue gas into elemental sulfur. The preparation technology of the catalyst has the advantages of simplicity, easy control, low cost and long service life. Adoption of the activated carbon-based catalyst prepared in the invention for selective reduction desulphurization not only realizes high efficiency SO2 conversion rate and sulfur selectivity, but also effectively prevents secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery, in particular to a method for removing SO from flue gas 2 The method adopts the reduction desulfurization process, uses the supported activated carbon as the catalyst, and removes the SO in the flue gas through CO reduction. 2 . Background technique [0002] SO 2 It is one of the main air pollutants and the main cause of the deteriorating air quality and the formation of acid rain. Humans emit SO into the atmosphere every year 2 Up to hundreds of millions of tons. SO 2 The most serious problem for human beings is the formation of acid rain. SO 2 Pollution has made the area of ​​acid rain in my country reach 30% of the country's land area. Acid rain has great harm to agricultural ecosystems, aquatic ecosystems, forest ecosystems, buildings and human health, and has become an important factor restricting the sustainable development of my country's economy and society. Therefore, res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/755B01J23/83B01D53/50B01D53/86
Inventor 王广建邴连成
Owner SHANDONG QINGYUAN GROUP CO LTD
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