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Hydrothermal-resistant and sulfur-tolerant overall structure combustion catalyst and preparation method thereof

A technology of combustion catalyst and overall structure, which is applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of good sulfur resistance, low manufacturing cost and simple preparation process

Inactive Publication Date: 2018-05-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the characteristics of the currently disclosed sulfur-resistant combustion catalysts, such as complex preparation process, high cost, and poor hydrothermal and sulfur resistance, the present invention proposes a combustion catalyst with a simple process, low manufacturing cost, and good toxicity resistance and a preparation method thereof

Method used

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  • Hydrothermal-resistant and sulfur-tolerant overall structure combustion catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] Weigh 5.85g of ammonium metavanadate and 2.84g of ammonium paratungstate into 100ml of deionized water, boil and dissolve to obtain solution A; then weigh 11.64g of cobalt nitrate hexahydrate and mix it in 200ml of deionized water to obtain solution B; , Solution B is added to the ball mill jar, and then 16gTiO 2 , 10g silica sol, 30g aluminum sol, the mixture was ball milled for 2 hours at a rotating speed of 500 rpm to obtain a coating slurry; the whole honeycomb carrier was immersed in the coating slurry, and the excess honeycomb carrier hole was blown out with compressed air. The coating solution; then the honeycomb carrier coated with the oxide coating was dried by microwave for 10 minutes, and then baked at 650 ° C for 3 hours to obtain a carrier coated with a mixed oxide coating; The carrier was immersed in palladium nitrate and chloroplatinic acid solutions in turn, and the excess solution in the pores of the honeycomb carrier was blown out with compressed air; ...

Embodiment 2

[0023] Weigh 17.55g of ammonium metavanadate and 8.52g of ammonium paratungstate and add them to 150ml of deionized water, boil and dissolve to make solution A; then weigh 16.16g of ferric nitrate nonahydrate and mix them in 200ml of deionized water to make solution B; , Solution B is added to the ball mill jar, and then 24gTiO 2 , 40g aluminum sol, the mixture was ball milled for 3 hours at a rotating speed of 500 rpm to obtain a coating slurry; the whole honeycomb carrier was immersed in the coating slurry, and the excess coating liquid in the pores of the honeycomb carrier was blown out with compressed air ; Then the honeycomb carrier coated with the oxide coating was dried by microwave for 8 minutes, and then baked at 550 ° C for 4 hours to obtain a carrier coated with a mixed oxide coating; the carrier coated with a mixed oxide coating was sequentially immersed in palladium nitrate and chloroplatinic acid solution, use compressed air to blow out excess solution in the por...

Embodiment 3

[0025] Weigh 17.55g of ammonium metavanadate and 7.1g of ammonium paratungstate and add them to 150ml of deionized water, boil and dissolve to make solution A; then weigh 8.73g of nickel nitrate hexahydrate and mix them in 200ml of deionized water to make solution B; , B solution is added to the ball mill jar, and then add 28gTiO 2, 40g of silica sol, the mixture was ball milled for 2 hours at a rotating speed of 500 rpm to obtain a coating slurry; the whole honeycomb carrier was immersed in the coating slurry, and the excess coating liquid in the pores of the honeycomb carrier was blown out with compressed air ; Then the honeycomb carrier coated with the oxide coating was dried by microwave for 10 minutes, and then baked at 650 ° C for 3 hours to obtain a carrier coated with a mixed oxide coating; the carrier coated with a mixed oxide coating was immersed once A mixed solution of palladium nitrate and chloroplatinic acid was used to blow out the excess solution in the pores o...

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Abstract

The invention discloses a hydrothermal-resistant and sulfur-tolerant overall structure combustion catalyst and a preparation method thereof. A matrix of the catalyst adopts an overall honeycomb ceramic body, the surface of the matrix is coated with coatings of SiO2, Al2O3 and TiO2 and coatings of transition metal oxides of V, Mn, Fe, Co, Cu, W and the like, and then, active components Pt and Pd are dipped on a carrier supporting the mixed oxide coatings separately or jointly. The disclosed overall structure catalyst has high activity and stability, can tolerate high water content and SO2-containing atmosphere, is applicable to combustion tail gas purification of water heaters or gas-fired boilers with natural gas, liquefied petroleum gas or coal gas as fuel and can be used for efficient removal and purification of sulfur-containing VOC gas. The preparation process of the catalyst is simple and the cost is low.

Description

technical field [0001] The invention belongs to the field of catalytic combustion environmental protection, and in particular relates to a hydrothermal and sulfur-resistant integral structure combustion catalyst and a preparation method thereof. Background technique [0002] As a clean energy, the proportion of natural gas in my country's primary energy consumption is increasing year by year, especially with the gradual improvement of the urban natural gas pipeline network supply system, natural gas has become the main civil fuel. According to the national standard GB17820-2012, the sulfur content in Class I natural gas should be less than 60mg / m 3 , the sulfur content in Category II natural gas should be less than 200mg / m 3 , the sulfur content in Category III natural gas should be less than 350mg / m 3 . Natural gas will undergo incomplete combustion during use, producing CO as a product of incomplete combustion, such as gas water heaters, when the CO concentration reache...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/656B01J37/02B01J37/16B01D53/86B01D53/62B01D53/44
CPCB01D53/864B01D53/8687B01D2255/1021B01D2255/1023B01D2255/20707B01D2255/20723B01D2255/2073B01D2255/20738B01D2255/20746B01D2255/20761B01D2255/20776B01D2255/2092B01D2255/30B01J23/6562B01J23/8993B01J37/0215B01J37/16
Inventor 王胜王树东林乐汪明哲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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