Multifunctional catalyst, and preparation method and application thereof

A catalyst, multi-functional technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor hydrothermal stability of molecular sieves, increase the anti-sulfur poisoning performance, and strengthen the application and promotion value. , Environmentally friendly effect

Active Publication Date: 2020-05-19
南京环福新材料科技有限公司
View PDF14 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned catalysts can solve the problem of strong strength of the cataly

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

Example Embodiment

[0034] Example 1

[0035] (1) Preparation of catalyst carrier

[0036] Weigh 25.000g of zirconium hydrogen phosphate, add 750g of deionized water and mix uniformly, stir with ultrasonic for 1h to obtain a zirconium hydrogen phosphate suspension, then weigh 25.000g of polyvinyl alcohol and add it to the zirconium hydrogen phosphate suspension at a temperature of 80℃ Stir for 6h until the polyvinyl alcohol particles are completely dissolved under the conditions of, then weigh 75.000g of titanium trioxide into the mixed solution, stir for 2h at a temperature of 80℃; then place the mixed slurry in an oven at 100℃ for 4h , And then calcined in a muffle furnace at 500°C for 2 hours to obtain catalyst carrier particles;

[0037] (2) Active component precursor solution configuration

[0038] Weigh 2.522g cerium nitrate hexahydrate, 2.058g manganese nitrate solution, 1.265g ferric nitrate nonahydrate and 5.845g polyvinyl alcohol, add 58.450g deionized water and stir at 80℃ for 6h until polyvi...

Example Embodiment

[0048] Example 2:

[0049] (1) Preparation of catalyst carrier

[0050] Weigh 25.000g of zirconium hydrogen phosphate, add 750g of deionized water and mix uniformly, stir with ultrasonic for 1h to obtain a zirconium hydrogen phosphate suspension, then weigh 25.000g of polyvinyl alcohol and add it to the zirconium hydrogen phosphate suspension at a temperature of 80℃ Stir for 6h until the polyvinyl alcohol particles are completely dissolved under the conditions of, then weigh 75.000g of titanium trioxide into the mixed solution, stir for 2h at a temperature of 80℃; then place the mixed slurry in an oven at 100℃ for 4h , And then calcined in a muffle furnace at 500°C for 4 hours to obtain catalyst carrier particles;

[0051] (2) Active component precursor solution configuration

[0052] Weigh 8.071g cerium nitrate hexahydrate, 1.646g manganese nitrate solution, 1.012g ferric nitrate nonahydrate and 10.729g polyvinyl alcohol, add 107.290g deionized water and stir at 80℃ for 6h until pol...

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 multifunctional catalyst, and a preparation method and application thereof. A mixture of zirconium hydrogen phosphate and titanium trioxide is taken as a carrier, a cerium-manganese-iron composite oxide is taken as a catalytic active component, and strontium oxide is taken as a cocatalyst. Based on the mass of the carrier, the mass percentage of the active component is 2-4%, and the mass percentage of the cocatalyst is 0.5-1%. The preparation method comprises the following steps: uniformly stirring the active component, a cocatalyst precursor solution and the catalystcarrier, performing aging, and then carrying out extrusion molding, drying, and roasting. The catalyst is environmentally friendly, can remove NOx in diesel engine tail gas and synergistically catalyze and remove CO and HC at a low temperature, and has a wide active temperature interval and low SO2 oxidation efficiency. The denitration efficiency of the catalyst is higher than 95% and reaches upto 100% in a temperature range of 150-350 DEG C, and the oxidation efficiency of CO and HC is higher than 90% and reaches up to 98.7% and 97.6%, respectively. The catalyst is high in cost performanceand particularly applicable to the field of low-speed diesel engine tail gas purification.

Description

technical field [0001] The invention relates to a multifunctional catalyst and its preparation method and application, belonging to the fields of environmental protection catalytic materials and air pollution control, and the product prepared by the method is especially suitable for the field of low-speed diesel engine tail gas purification. Background technique [0002] With the development of my country's economy and society, the problem of air pollution has become increasingly prominent. Among them, the pollution caused by motor vehicle exhaust emissions occupies a considerable proportion, while the emissions of diesel vehicles, especially heavy-duty diesel vehicles, are significant. Because of its high efficiency and good stability, the ammonia selective catalytic reduction method has been recognized as the mainstream technical route for denitrification of diesel vehicle exhaust. Selective catalytic reduction (SCR) has become the mainstream technology and development di...

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): B01J27/187B01J37/02B01J37/08B01D53/94B01D53/56B01D53/62B01D53/72
CPCB01J27/187B01J37/0201B01J37/088B01D53/945B01D2258/01Y02T10/12
Inventor 沈岳松金奇杰
Owner 南京环福新材料科技有限公司
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