Antiwear honeycomb type denitration catalyst for reducing SO2 oxidation rate and preparation method thereof

A denitration catalyst and honeycomb technology are applied in the field of denitration catalysts that resist uneven deposition of heavy metals in flue gas and the field of preparation thereof, which can solve the problems of poor wear resistance, unbalanced active centers, unstable activity and the like, and improve water resistance. performance, reduced oxidation, good activity and strength

Inactive Publication Date: 2017-09-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a kind of reducing SO 2 Oxidation rate anti-wear honeycomb denitrification catalyst and preparation method thereof, to overcome the defects of unbalanced active centers, poor wear resistance and unstable activity of denitrification catalysts in the prior art in flue gas

Method used

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  • Antiwear honeycomb type denitration catalyst for reducing SO2 oxidation rate and preparation method thereof
  • Antiwear honeycomb type denitration catalyst for reducing SO2 oxidation rate and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0065] will contain TiO 2 500g of titanyl sulfate is dissolved in the sulfuric acid solution, and the 3 22.5g of ammonium molybdate, as P 2 o 5 4.5g of phosphoric acid solution, 4.5g of magnesium nitrate solution as MgO to form TiO-containing 2 It is a 35g / L mixed solution. After stirring for 2 hours, gradually add ammonia water to adjust the pH value to 9.5. After the precipitation is complete, filter and wash; then use deionized water to make a slurry with a water content of 50%, and add V 2 o 5 A total of 12.5g of ammonium metavanadate solution, stirred for 1.5h, dried, roasted at 550°C for 8h, and then ground into a powder with a particle size of less than 20μm; the powder was mixed with MoO 3 A total of 7.5g of ammonium molybdate, 4g of stearic acid, 3g of polyethylene oxide and deionized water are used to make a paste with a water content of 30%, adjust the pH value to 8.5 with ammonia water, add 5g of nano silicon dioxide, 4.5g of silicon dioxide after stirring Lim...

Embodiment 2

[0069] will contain TiO 2 500g of titanyl sulfate is dissolved in the sulfuric acid solution, and the 3 22.5g of ammonium molybdate, as P 2 o 5 4.0g of phosphoric acid, 4.0g of magnesium nitrate solution as MgO to form a TiO-containing 2 It is a 30g / L mixed solution. After stirring for 1.5h, gradually add ammonia water to adjust the pH value to 10. After the precipitation is complete, filter and wash; then use deionized water to make a slurry with a water content of 50% from the washed material, and add V 2 o 5 A total of 10g of ammonium metavanadate solution, stirred for 1.5h, dried, roasted at 550°C for 8h, and then ground into a powder with a particle size of less than 30μm; the powder was mixed with MoO 3 The ammonium molybdate of 7.5g, 3.5g stearic acid, 3.5g polyoxyethylene and deionized water are made the paste body containing water 32%, adjust pH value to 8.0 with ammoniacal liquor, add 4.5g nano silicon dioxide, 4g wollastonite, 17.5g glass fiber, 4g carboxymeth...

Embodiment 3

[0073] will contain TiO 2 500g of titanyl sulfate is dissolved in the sulfuric acid solution, and the 3 20g of ammonium molybdate, as P 2 o 5 3.5g of phosphoric acid, 3.5g of magnesium nitrate solution as MgO to form TiO-containing 2 It is a 30g / L mixed solution. After stirring for 1.0h, gradually add ammonia water to adjust the pH value to 9. After the precipitation is complete, filter and wash; then use deionized water to make a slurry with a water content of 45%, and add V 2 o 5 A total of 9g of ammonium metavanadate solution, stirred for 1.0h, dried, roasted at 550°C for 8h, and then ground into a powder with a particle size of less than 15μm; the powder was mixed with MoO 3 Ammonium molybdate of 5g, 3.0g stearic acid, 3.0g polyoxyethylene and deionized water are made into a paste with a water content of 28%, and the pH value is adjusted to 8.2 with ammonia water, and after stirring, add 3.5g nano silicon dioxide, 3.5 g wollastonite, 22.5g glass fiber, 3g carboxymeth...

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Abstract

The invention discloses an antiwear honeycomb type denitration catalyst for reducing the SO2 oxidation rate and a preparation method thereof. The preparation method comprises the following steps that a titanium source precursor is dissolved in acid to form a solution; a molybdenum source precursor, a phosphorus source precursor and a magnesium source precursor are respectively dissolved to form solutions; the solutions are uniformly mixed; the pH value is regulated; precipitation and filtering are performed; then, deionized water and a vanadium source precursor solution are added; after being uniformly mixed, the mixture is directly dried, roasted and ground into powder; an extrusion aid and a solution formed by the molybdenum source precursor and a pore-forming agent are added into the powder; water is added while the stirring is performed until the paste shape is formed; then, nano-silicon dioxide, wollastonite, glass fiber and an adhesion agent are added and are uniformly mixed; a honeycomb type blank is extruded by an extruder; the dried blank is firstly put into a silicon source precursor solution to be soaked; after roasting, the finished product is obtained. The defects of active instability, poorer antiwear performance and unbalanced active center of the denitration catalyst in the flue gas in the prior art can be overcome.

Description

technical field [0001] The invention relates to a method for reducing SO 2 The invention relates to an anti-oxidation anti-wear honeycomb denitrification catalyst and a preparation method thereof, especially a denitrification catalyst resistant to uneven deposition of heavy metals in flue gas and a preparation method thereof. The invention belongs to the technical field of new inorganic materials. Background technique [0002] Nitrogen oxides (NO x ) is one of the main air pollutants, and the emission requirements are becoming increasingly stringent. my country's "Twelfth Five-Year Plan" Comprehensive Work Plan for Energy Conservation and Emission Reduction stipulates that by 2015, the total national nitrogen oxide emissions will drop by 10% compared with 2010. In September 2011, the Ministry of Environmental Protection promulgated GB13223-2001 "Emission Standards of Air Pollutants for Thermal Power Plants", which made stricter requirements on the NOx emission concentratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/199B01D53/86B01D53/56
CPCB01J27/199B01D53/8628B01J35/04B01J37/0009B01J37/03B01J37/04
Inventor 贾媛媛巫树锋王军刘光利笪敏峰唐中华杨岳梁宝锋韩燕
Owner PETROCHINA CO LTD
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