Anti-abrasion denitration catalyst and preparation method thereof

A denitration catalyst and anti-wear technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of unstable activity, poor wear resistance, unbalanced active centers, etc. Stabilize, improve water resistance, reduce oxidation effect

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 an anti-wear denitrification catalyst and its preparation method to overcome the defects of unbalanced active centers, poor wear resistance and unstable activity of denitrification catalysts in the prior art

Method used

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  • Anti-abrasion denitration catalyst and preparation method thereof

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Embodiment 1

[0063] 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, 4.5g of magnesium nitrate solution as MgO to form a 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 Limestone,...

Embodiment 2

[0067] 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 3The 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 carboxymethy...

Embodiment 3

[0071] 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 anti-abrasion denitration catalyst and a preparation method thereof. The preparation method comprises the following steps of dissolving titanium source precursors into acid to form a solution; respectively dissolving molybdenum source precursors, phosphorus source precursors and magnesium source precursors to form solutions; uniformly mixing the solutions; regulating the pH value; performing precipitation, filtering and washing; then adding deionized water; preparing the materials into slurry; adding a vanadium source precursor solution; after uniform mixing, directly performing drying and roasting; grinding the materials into powder; next, adding extrusion auxiliary agents, a solution formed by the molybdenum source precursors and pore forming agents; adding water during the stirring to obtain paste; regulating the pH value; adding nanometer silicon dioxide, wollastonite, glass fiber and bonding agents; performing uniform mixing; extruding honeycomb-shaped blanks by an extruding machine; performing drying and roasting; then, obtaining a finished product. The prepared anti-abrasion denitration catalyst can overcome the defects of unstable activity, poor anti-abrasion performance and activity center unbalance of a denitration catalyst in flue gas in the prior art.

Description

technical field [0001] The invention relates to an anti-wear denitration catalyst and a preparation method thereof, in particular to a denitration catalyst resistant to uneven deposition of vanadium in flue gas and a preparation method thereof, which 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 concentration of thermal power plants: it stipulates that the coal-fired boilers newly built, expanded a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/199
CPCB01J27/199B01J35/04B01J37/0009B01J37/03B01J37/04
Inventor 巫树锋贾媛媛刘光利唐中华王军杨岳梁宝锋李晶蕊李常青谷丽芬
Owner PETROCHINA CO LTD
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