Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of denitration catalyst for improving specific surface area

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 active center imbalance, achieve low preparation cost, high catalyst performance, rich The Effect of Spatial Network-like Nanoscale Micropores

Inactive Publication Date: 2017-09-08
PETROCHINA CO LTD
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a preparation method of a denitrification catalyst with increased specific surface area to overcome the defect that the active center of the denitrification catalyst in the prior art is unbalanced in the high temperature flue gas, and the catalyst of the present invention can resist flue gas The medium oxide is deposited unevenly on the surface, which increases the specific surface area of ​​the catalyst and improves the performance of the catalyst.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of denitration catalyst for improving specific surface area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 15g activated alumina is beaten 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; after roasting, the powder was mixed with WO 3 A total of 7.5g of ammonium metatungstate was formulated into a slurry with a water content of 30%. After stirring, 4g of scallop powder was added, stirred for 40min, sealed and left for 8h, dried, and roasted at 620°C for 4h to obtain a denitrification catalyst. The ...

Embodiment 2

[0047] 20g of activated alumina is beaten 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 mechanically for 1h while stirring, and 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 was made into a slurry with a water content of 30%. After stirring, 3g of urea was added, stirred for 30 minutes, sealed and left for 20 hours, dried, and roasted at 550°C for 8 hours to obtain a denitration catalyst. The fresh catalyst ob...

Embodiment 3

[0051] 20g of activated alumina is beaten 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 15g of ammonium paratungstate solution, mechanically stirred for 1 hour, then gradually added ammonia water to adjust the pH value to 10.5, after the precipitation was complete, filtered and washed; then the washed material was made into a slurry with a water content of 40% with distilled water, and added with V 2 o 5 A total of 5g of ammonium metavanadate solution, mechanically stirred for 1h, dried directly, and roasted at 500°C for 6h; after roasting, the powder was mixed with WO 3 A total of 3.5g of ammonium metatungstate solution was made into a slurry with a water content of 28%. After stirring, 2.5g of scallop powder was added, stirred for 40min, sealed and left for 20h, dried, and roasted at 500°C for 4h to obtain a denitrification catalyst...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Pore volumeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a denitration catalyst for improving the specific surface area. A preparation method of the denitration catalyst comprises the following steps: firstly, beating activated aluminum oxide; secondly, dissolving a titanium source precursor; thirdly, dissolving a tungsten source precursor, and mixing the dissolved tungsten source precursor with solutions in the first step and the second step; fourthly, adjusting a pH value of the solution mixed in the third step to 8 to 13, and precipitating, filtering and washing to obtain a filter cake; fifthly, adding deionized water into the filter cake in the fourth step, mixing to form a pulpous state, adding a vanadium source precursor solution, uniformly mixing, and then drying and roasting to form a powdery substance; sixthly, mixing a solution formed by a molybdenum source precursor with the powdery substance in the fifth step to form the pulpous state; after stirring, adding a pore-forming agent; after secondary stirring, sealing, standing, drying and roasting to obtain the denitration catalyst. The denitration catalyst prepared by the preparation method disclosed by the invention has the advantages that the specific surface area of the catalyst can be increased, non-uniform deposition of heavy metal in flue gas on the surface of the catalyst can be resisted, and catalyst properties are improved.

Description

technical field [0001] The invention relates to a preparation method of a denitration catalyst with increased specific surface area, in particular to a preparation method of a denitration catalyst resistant to uneven deposition of vanadium in flue gas. 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-fired boilers newly b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J23/30B01J35/10B01J37/04B01J37/08B01J37/00
CPCB01J23/002B01J23/30B01J37/00B01J37/0018B01J37/04B01J37/088B01J2523/00B01J35/615B01J2523/31B01J2523/47B01J2523/55B01J2523/69
Inventor 刘光利杨岳贾媛媛荣树茂李杨巫树锋梁宝锋王立蓉唐中华王军
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com