Denitration catalyst improving specific surface area and preparation method thereof

A technology of denitrification catalyst and specific surface area, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problem of unbalanced active centers and achieve improved efficiency, increased strength, and tight connection Effect

Inactive Publication Date: 2017-09-26
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The main purpose of the present invention is to provide a denitrification catalyst with increased specific surface area and its preparation method to overcome the defect that the active center of the denitrification catalyst in the prior art is unbalan...

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  • Denitration catalyst improving specific surface area and preparation method thereof

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Embodiment 1

[0047] Add 15g of coconut shell activated carbon into the glucose solution, mix well and beat to form a slurry (a), which will contain TiO 2 500g of titanyl sulfate is dissolved in sulfuric acid solution to form TiO 2 For 35g / L solution (b), will contain WO 3 A total of 22.5g of ammonium paratungstate solution was mixed with the materials (a) and (b). After ultrasonic vibration for 2 hours, ammonia water was gradually added to adjust the pH value to 9.0. After the precipitation was complete, filter and wash; into a slurry with a water content of 60%, adding V 2 o 5 A total of 4.5g of ammonium metavanadate solution was stirred and ultrasonically oscillated for 1.5h. After direct drying, it was roasted at 620°C for 4h in a nitrogen atmosphere; after roasting, the powder was mixed with WO 3 A total of 7.5g of ammonium metatungstate solution was made into a slurry with a water content of 30%. After stirring, 4g of scallop powder was added, stirred for 40min, sealed and left for...

Embodiment 2

[0051] Add 20g of wood-based activated carbon into the sucrose solution, mix thoroughly and beat to form a slurry (a), which will contain TiO 2 500g of titanyl sulfate is dissolved in sulfuric acid solution to form TiO 2 For 35g / L solution (b), add (a), (b) containing WO 3 A total of 22.5g of ammonium paratungstate solution, after mechanical stirring for 1.5h, 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 with V 2 o 5 A total of 2.5g of ammonium metavanadate solution was stirred mechanically for 1.5h at the same time, and after direct drying, it was roasted at 600°C in a nitrogen environment for 6h; after roasting, the powder was mixed with WO 3 A total of 5g of ammonium metatungstate solution was prepared into a slurry with a water content of 35%. After stirring, 2.5g of scallop powder was added, stirred for 30 minutes, sealed an...

Embodiment 3

[0055] Add 20g of wood-based activated carbon into the sucrose solution, mix thoroughly and beat to form a slurry (a), which will contain TiO 2 500g of metatitanic acid is dissolved in sulfuric acid solution to form TiO 2 For 35g / L solution (b), add (a), (b) containing WO 3 A total of 20g of ammonium paratungstate solution, after mechanical stirring for 1 hour, 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 45%, and add V 2 o 5 A total of 5g of ammonium metavanadate solution was stirred and ultrasonically oscillated for 1h. After direct drying, it was roasted at 550°C for 6h; after roasting, the powder was mixed with WO 3 A total of 5g of ammonium metatungstate solution was used to make a slurry with a water content of 30%. After stirring, 3g of urea was added, stirred for 30min, sealed and left for 20h, dried, and roasted at 550°C for 5h to obt...

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Abstract

The invention discloses a denitration catalyst improving a specific surface area and a preparation method thereof. The preparation method comprises the following steps: (1) mixing activated carbon with a saccharide solution and then pulping; (2) dissolving titanium source precursor; (3) dissolving tungsten source precursor, mixing the tungsten source precursor with the liquid of step (1) and step (2) evenly; (3) adjusting the pH value of the materials of the step (3) to be 8 to 13, precipitating, filtering and washing to obtain a filter cake; (5) adding deionized water into the filter cake obtained in the step (4), adjusting into a pasty form, adding a vanadium source precursor solution, mixing uniformly and drying, and conducting calcination under the protection of inert gas to form a powder material; (6) mixing the tungsten source precursor formed solution with the powder material of step (5) to form a pasty form, adding pore-forming agents to mix, sealing, standing and drying, and conducting calcination in an inert gas atmosphere to obtain the denitration catalyst. According to the invention of the denitration catalyst improving the specific surface area and the preparation method thereof, the specific surface area of the catalyst is improved, the non-uniform deposition of the heavy metal in the flue gas is avoided and the catalyst performance is improved.

Description

technical field [0001] The invention relates to a denitration catalyst with increased specific surface area 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. 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 concentration of thermal power plants: it stipulates that the coal-fir...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J37/34B01J35/10B01D53/86B01D53/56
CPCB01J23/002B01D53/8628B01D2258/0283B01J23/30B01J35/1019B01J37/343B01J2523/00B01J2523/47B01J2523/55B01J2523/69
Inventor 刘光利杨岳贾媛媛李杨荣树茂巫树锋王立蓉唐中华梁宝锋王军
Owner PETROCHINA CO LTD
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