Unlock instant, AI-driven research and patent intelligence for your innovation.
SCR catalyst with wide active temperature windows as well as preparation method and use thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of active temperature window and SCR catalyst, which is applied in the field of SCR catalyst and its preparation, can solve the problems of poor selectivity and narrow temperature window, and achieve the effects of convenient operation, high-temperature performance improvement and excellent catalytic performance
Inactive Publication Date: 2011-06-01
TIANJIN UNIV
View PDF4 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0007] The purpose of the present invention is to provide a SCR catalyst with a wide activity temperature window and its preparation method and application, which can overcome the defects of narrow temperature window, good medium and low temperature activity but high temperature activity and poor selectivity in the catalyst reported in the past
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0027] Weigh 10.00g of titanium dioxide powder, dry it in an oven at 100°C overnight, and roast it in air at 500°C for 3 hours to obtain catalyst 1.
Embodiment 2
[0029] Weigh 2.500g of oxalic acid and dissolve it in water, heat at 70°C, and stir magnetically. After dissolution, weigh 0.106g of vanadiumpentoxidepowder, dissolve it in oxalic acid solution, and stir for 1h until the vanadiumpentoxide powder is completely dissolved. Weigh 10.00g of titanium dioxide, immerse in the vanadium oxalate solution, stir for 1h, then spin evaporate to dryness at 70°C, dry in an oven at 100°C overnight, and roast in air at 500°C for 3h to obtain Catalyst 2.
[0030] Change the amount of vanadium pentoxide to 0.203g, 0.300g, 0.401g, 0.503g, 0.600g, 0.701g, 0.800g, and keep the amount of titanium dioxide unchanged. Catalysts with different vanadium contents are prepared in the same way 3, 4, 5, 6 , 7, 8, 9. The vanadium contents of the eight catalysts are: 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%.
Embodiment 3
[0032] Dissolve 2.500g of oxalic acid in water, heat at 70°C, and stir magnetically. After dissolving, weigh 0.401g of vanadium pentoxide powder, dissolve it in oxalic acid solution, and stir for 1h until the vanadium pentoxide powder is completely dissolved. Vanadiumoxalate solution. Take a small amount of deionized water, add 0.440 g of zirconia, and add vanadium oxalate solution, stir for 1 hour until the mixture is uniform. Weigh 10.00g of titanium dioxide, immerse in the vanadium-zirconiummixed solution, stir for 1 hour, then spin evaporate to dryness at 70°C, dry in an oven at 100°C overnight, and calcinate in air at 500°C for 3 hours to prepare Catalyst 10.
[0033] The amount of zirconia was changed to 0.882g, 1.321g, 1.760g, 2.203g, and the amount of vanadium pentoxide and titanium dioxide was kept constant. Catalysts 11, 12, 13, and 14 with different zirconium contents were prepared by the same method. The five catalysts are: 2.2%, 8.8%, 13.2%, 17.6%, 22%.
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
Login to View More
Abstract
The invention relates to a Selective Catalytic Reduction (SCR) catalyst with a wide activity temperature window and a preparation method and application thereof. The method takes anatase TiO2 containing 8 to 10 percent of WO3 as a carrier, 1 to 8 weight percent of V2O5 as an active constituent, and 4.4 to 22 percent of ZrO2 as an auxiliary agent. TiO2 powder is impregnated into a mixed solution of zircon salt and vanadiumoxalate, then is rotatablely evaporated to dryness at a temperature of between 70 and 75 DEG C, and is dried and baked. The SCR catalyst can realize the high-efficiency catalytic removal of nitrogenoxide within a temperature range of between 230 and 500 DEG C, and is suitable for the treatment of tail gas NOx of diesel powered vehicles and is used as denitration devices of stationary source coal-fired power plants.
Description
technical field [0001] The invention relates to an SCR catalyst with a wide activity temperature window and its preparation method and application, in particular to a V-Zr-W-Ti system SCR catalyst with a wide activity temperature window, which can be realized in the temperature range of 230-500°C Efficient catalytic removal of nitrogen oxides. Background technique [0002] In recent years, global energy consumption has continued to grow, and the combustion of fossil fuels has brought nitrogen oxides (NO x ) and other acidic substances continue to intensify. NO x It mainly comes from vehicle exhaust, fossil fuelcombustion in thermal power stations and other industries, and industrial production processes such as nitric acid and nitrogen fertilizers. The acid rain, photochemical smog, ozone layer destruction, and greenhouse effect caused by them have become increasingly prominent global environmental problems. NO x Emission control has become one of the key issues concern...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More