Molybdenum-based low-temperature denitration catalyst and preparation thereof

A low-temperature denitrification and catalyst technology, which is applied in the field of preparation of low-temperature denitrification catalysts, can solve the problems of unsatisfactory catalyst stability and service life, and affect the industrial production of catalysts, etc., to achieve improved service life, high dispersion, and improved specific surface area and stability Effect

Inactive Publication Date: 2013-03-13
CECEP L&T ENVIRONMENTAL TECH
View PDF5 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some progress has been made in the research of low-temperature catalysts. At present, the research mainly focuses on the research of Mn-Ti low-temp

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing a molybdenum-based low-temperature denitration catalyst, comprising the following process steps,

[0019] (1) Ultrasonic mixing: Turn on the reactor, turn on the ultrasonic device, add 40kg of deionized water to the ultrasonic reactor, heat up to 50°C, add 1.4kg of dilute sulfuric acid, add 3.1kg of ammonium molybdate to react for 20min, add oxalic acid 5.4 kg reaction 15min,

[0020] -2-

[0021] Add 2.5kg of ammonium metavanadate and react for 30 minutes, add 38kg and react for 90 minutes, and it becomes muddy.

[0022] (2) Drying and roasting: Transfer the mud to dry at 150°C for 2 hours, remove it and pulverize it, and transfer it to a calcining kiln for segmental calcination; sintering and baking: the speed of the tunnel kiln is 120 rpm, the temperature in the first zone is 250°C, and the temperature in the second zone The temperature is 350°C, the temperature in the third zone is 450°C, and the temperature in the fourth zone is 450°C. Afte...

Embodiment 2

[0031] (1) Ultrasonic mixing: Turn on the reactor, turn on the ultrasonic device, add 40kg of deionized water to the ultrasonic reactor, heat up to 50°C, add 1.4kg of dilute sulfuric acid, add 3.1kg of ammonium molybdate to react for 20min, and add ammonium oxalate 4.8kg was reacted for 15min, 2.5kg of copper nitrate was added to react for 30min, and 38kg was added to react for 90min, and it became muddy.

[0032] (2) Drying and roasting: Dry the mud at 150°C for 2 hours, remove it and pulverize it, and transfer it to a calcining kiln for segmental calcination; sintering and baking: the speed of the tunnel kiln is 120 rpm, the temperature in the first zone is 250°C, and the temperature in the second zone is 350°C ℃, the temperature in the third zone is 450 ℃, the temperature in the fourth zone is 450 ℃, and the temperature is 50-60 minutes, and the catalyst is crushed into particles by impact milling to obtain the catalyst.

[0033] (3) Catalyst activity test condition is the ...

Embodiment 3

[0037] (1) Ultrasonic mixing: Turn on the reactor, turn on the ultrasonic device, add 40kg of deionized water to the ultrasonic reactor, heat up to 50°C, add 1.4kg of dilute sulfuric acid, add 3.1kg of ammonium molybdate to react for 20min, and add 5.4kg React for 15 minutes, add 2.5kg of ammonium metavanadate and 3.1kg of copper nitrate and react for 30 minutes, add 38kg and react for 90 minutes, and it becomes a slurry.

[0038] (2) Drying and roasting: Dry the mud at 150°C for 2 hours, remove it and pulverize it, and transfer it to a calcining kiln for segmental calcination; sintering and baking: the speed of the tunnel kiln is 120 rpm, the temperature in the first zone is 250°C, and the temperature in the second zone is 350°C ℃, the temperature in the third zone is 450 ℃, the temperature in the fourth zone is 450 ℃, and the temperature is 50-60 minutes, and the catalyst is crushed into particles by impact milling to obtain the catalyst.

[0039] (3) Catalyst activity test ...

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 discloses a molybdenum-based low-temperature denitration catalyst and a preparation thereof. The catalyst is characterized in that TiO2 is used as a carrier, the oxides of molybdenum are used as active components, one or more of the oxides of metals V, W, Cu, Ni, Zn and Ce are added as auxiliaries, and the active components in the prepared catalyst occupiy 1-15% of the catalyst. The preparation method of the catalyst comprises the steps of ultrasonic mixing, drying, crushing and roasting. By using ammonia as a reducing agent, the denitration efficiency can be up to 80% when the temperature is 130 DEG C and the temperature of an active window is 150-446 DEG C when the catalyst is up to 99%; and during the preparation, drying and roasting are carried out, then the specific surface area and the stability of the catalyst are improved and the service life of the catalyst is prolonged, so that the catalyst has good industrial application prospect. The catalyst is suitable for the smoke low-temperature denitration catalytic processes.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and mainly relates to a preparation method of a low-temperature denitration catalyst. Background technique [0002] With the continuous tightening of my country's environmental protection policies, in order to achieve the total national nitrogen oxide emissions during the "Twelfth Five-Year Plan" period to be controlled at 20.462 million tons, which is 10% lower than the total target of 22.736 million tons in 2010, "the most stringent denitrification standard in history" "Starting from January 1, 2012, my country's denitrification technology and application will enter a large-scale development stage in the past five years. SCR flue gas denitrification technology will surely achieve large-scale application in the field of power plants due to its efficient and stable performance. Since the 1970s Japan developed the commercial V 2 o 5 / TiO 2 The medium-temperature catalyst in the system, the cat...

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): B01J23/28B01J23/885B01J23/887B01D53/90B01D53/56
Inventor 朱彤林德海王昕竑王中原宋宝华杨剑
Owner CECEP L&T ENVIRONMENTAL TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap