Unlock instant, AI-driven research and patent intelligence for your innovation.

Denitrification catalyst and preparation method thereof

A technology of denitrification catalysts and regulators, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc.

Active Publication Date: 2020-07-07
CHINA BUILDING MATERIALS ACAD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current SCR catalyst production lacks a production process with wide adaptability, good catalytic effect, low preparation cost and long catalyst life.

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
  • Denitrification catalyst and preparation method thereof
  • Denitrification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] An embodiment of the present invention provides a method for preparing a denitration catalyst, which includes:

[0033] 1) Mix the metal salt and the organic acid at a molar ratio of 1:0.1-10, add water and stir to dissolve to obtain a mixed solution; add a regulator to the mixed solution to pH 2-9, and heat to obtain a precipitate; heat the precipitate for 120 -200°C to combustion, the combustion atmosphere is air, nitrogen, oxygen or argon to obtain a powder precursor; wherein the metal salt is a metal nitrate or a mixture of a metal nitrate and a metal organic salt;

[0034] 2) Mixing the powder precursor and the carrier to obtain a mixture; mixing the mixture with a binder, structural aids and water to obtain a mud; smelting and aging the mud and extruding to obtain a catalyst Body

[0035] 3) Dry the catalyst body at 50-80°C, calcinate at 450-700°C for 5-12 hours, and cool to obtain a denitration catalyst.

[0036] Preferably, the organic acid is at least one of citric ac...

Embodiment 1

[0047] An embodiment of the present invention provides a method for preparing a denitration catalyst, which includes:

[0048] 1) Mix manganese nitrate and cerium nitrate at a molar ratio of 6:1 to obtain a metal salt; mix the metal salt and citric acid at a molar ratio of 1:1, add two parts of water and stir until completely dissolved to obtain a mixed solution; Add ammonia water slowly while stirring, adjust the pH to 5-6, heat and evaporate to dryness at 80°C for 3-4 hours, until the water in the solution disappears, and a precipitate is obtained, which is gelatinous or massive; heat the precipitate to 120°C , After the precipitate is burnt without self-propagation at low temperature, it is cooled to obtain the powder precursor;

[0049] 2) Mix the powder precursor and titanium dioxide at a weight ratio of 3:20 to obtain a mixture; mix the mixture with 0.7 parts of HPMC, 1 part of PU and 3 parts of water to obtain a mud; Mud 1-2 times, placed for 24h for aging, extruded by a sc...

Embodiment 2

[0053] An embodiment of the present invention provides a method for preparing a denitration catalyst, which includes:

[0054] 1) Mix copper nitrate and ferric nitrate at a molar ratio of 4:1 to obtain a metal salt; mix the metal salt and citric acid at a molar ratio of 1:1, add two parts of water and stir until completely dissolved to obtain a mixed solution; Add ammonia water slowly while stirring, adjust the pH to 5-6, heat and evaporate to dryness at 80°C for 3-4 hours, until the water in the solution disappears, and a precipitate is obtained, which is gelatinous or massive; heat the precipitate to 120°C , After the precipitate is burnt without self-propagation at low temperature, it is cooled to obtain the powder precursor;

[0055] 2) Mix the powder precursor and titanium dioxide at a weight ratio of 3:20 to obtain a mixture; mix the mixture with 0.7 parts of HPMC, 1 part of PU and 3 parts of water to obtain a mud; Mud 1-2 times, placed for 24h for aging, extruded by a screw...

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

No PUM Login to View More

Abstract

The invention relates to a denitration catalyst and a preparation method thereof. The preparation method includes: 1) mixing a metal salt with an organic acid, adding water and stirring until dissolved to obtain a mixed solution; adding a regulator to the mixed solution to pH 2-9, and heating , obtain a precipitate; heat the precipitate to combustion to obtain a powder precursor; wherein the metal salt is a metal nitrate or a mixture of a metal nitrate and a metal organic salt; 2) combine the powder precursor with a carrier Mix to obtain a mixture; mix the mixture with a binder, a structural aid and water to obtain a mud; simmer and age the mud and extrude it to obtain a catalyst body; 3) use the catalyst body The body is dried, roasted and cooled to obtain a denitration catalyst. The invention adopts a combustion method to prepare a denitration catalyst, which reduces the preparation cost and improves the adaptability of the catalyst.

Description

Technical field [0001] The invention relates to the field of industrial catalysts, in particular to a denitration catalyst and a preparation method thereof. Background technique [0002] With the continuous advancement of my country's industrial process, energy demand and consumption are increasing day by day, and my country's energy structure is still in a stage of gradual adjustment. Faced with the current situation where thermal power is still the mainstay and the large-scale use of diesel engines still exists, nitrogen oxide emissions have remained high. As one of the main air pollutants in cities, nitrogen oxides are the main cause of acid rain and photochemical smog. Today, when the country is advocating the construction of a green ecological economy and pursuing "green mountains and green waters", the state and various localities have issued relevant policies to control the emission of nitrogen oxides as an important part of the task of energy saving and emission reductio...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J23/745B01J37/03B01J37/08B01J35/04B01D53/86B01D53/56
CPCB01D53/8628B01J23/002B01J23/34B01J23/745B01J37/0018B01J37/031B01J37/086B01J35/56
Inventor 陈琛赵春林吴彦霞陈鑫唐婕梁海龙胡利明
Owner CHINA BUILDING MATERIALS ACAD