Preparation method of CuCeSAPO-34 molecular sieve, product obtained therethrough, and use of product

A molecular sieve and deionized water technology, applied in separation methods, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of limiting the application of molecular sieves, affecting catalytic performance, and high synthesis cost, and achieving excellent catalytic activity, uniform morphology, and crystallization. good effect

Inactive Publication Date: 2018-11-30
YANCHENG ENVIRONMENTAL ENG TECH RES & DEV CENT TSINGHUA UNIV
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Small-pore molecular sieve CuSAPO-34 has excellent denitrification catalytic performance, small pore size, good selectivity for nitrogen oxide catalysis, large specific surface area, improved catalytic conversion rate, high hydrothermal stability, and overcomes harsh conditions. Reaction conditions, h...

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 CuCeSAPO-34 molecular sieve, product obtained therethrough, and use of product
  • Preparation method of CuCeSAPO-34 molecular sieve, product obtained therethrough, and use of product
  • Preparation method of CuCeSAPO-34 molecular sieve, product obtained therethrough, and use of product

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] Such as Figure 1-4 Shown, the preparation method of CuCeSAPO-34 molecular sieve, using one-step hydrothermal synthesis method to prepare CuCeSAPO-34 molecular sieve and used for NH 3 - SCR reaction comprising the steps of:

[0027] Step 1. Add tetraethylammonium hydroxide into deionized water and stir. After the solution is evenly stirred, add aluminum isopropoxide until completely dissolved, then add orthophosphoric acid and ethyl orthosilicate, and then add cerium salt after mixing. After fully stirring, add copper salt and stir evenly to obtain a sol;

[0028] Step 2. Put the sol in step 1 into a hydrothermal reaction kettle for crystallization. After the crystallization reaction is completed, cool at room temperature, separate the solid crystalline product from the mother liquor, wash the solid crystalline product with deionized water until neutral, and dry 1. After roasting in the air, the desired CuCeSAPO-34 molecular sieve was obtained.

[0029] In this metho...

Embodiment 1

[0038] CuCeSAPO-34 molecular sieves prepared by one-step hydrothermal synthesis and used in NH 3 -SCR reaction, the preparation method of CuCeSAPO-34 molecular sieve, comprises the following steps:

[0039]Add 1.47g of tetraethylammonium hydroxide into 6.3g of deionized water and stir. After the solution is uniform, add 2.08g of aluminum isopropoxide until completely dissolved, then add 1.38g of orthophosphoric acid and 0.63g of ethyl orthosilicate, and wait After mixing, add 0.08g of cerium nitrate, after fully stirring, add 0.03g of copper acetate, then put the fully stirred sol into a hydrothermal reaction kettle for crystallization, then cool at room temperature, separate the solid crystalline product from the mother liquor, and wash until neutral , after drying in the air at 80°C, the molecular sieve powder was obtained, and the raw powder of the molecular sieve was calcined in the air at 550°C for 5 hours, and CuCeSAPO-34 molecular sieve catalyst was finally obtained.

...

Embodiment 2

[0042] The raw material feeding order and grinding time of preparing CuCeSAPO-34 molecular sieve are the same as embodiment 1, wherein, aluminum isopropoxide, orthophosphoric acid, ethyl orthosilicate, deionized water, tetraethylammonium hydroxide, copper salt, cerium salt The amount added should make each component A1 during the crystallization reaction 2 o 3 ,P 2 o 5 , SiO 2 、H 2 The molar ratio of O, TEAOH, copper salt, and cerium salt is 1:1.2:0.6:70:2:0.01:0. The fully stirred sol is put into a hydrothermal reaction kettle, crystallized at 170°C for 3d, and then After cooling, the solid crystalline product was separated from the mother liquor, washed until neutral, dried at 80°C, and calcined in air at 550°C for 5 hours to finally obtain CuCeSAPO-34 molecular sieve with an inorganic atom utilization rate of 85.5%.

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 preparation method of CuCeSAPO-34 molecular sieve, a product obtained therethrough, and a use of the product. The preparation method comprises the following steps: adding tetraethylammonium hydroxide to deionized water, stirring the tetraethylammonium hydroxide and deionized water to obtain a uniform solution, adding aluminum isopropoxide, adding orthophosphoric acid andethyl orthosilicate after the aluminum isopropoxide is completely dissolved, uniformly mixing the obtained solution, adding a cerium salt, fully stirring the solution and the cerium salt, adding a copper salt, adding the obtained completely stirred sol into a hydrothermal reactor, crystallizing the sol, carrying out room temperature cooling, separating the obtained solid crystallization product with the obtained mother liquor, washing the solid crystallization product until the solid crystallization product is neutral, drying the washed solid crystallization product, and calcining the dried solid crystallization product in air to obtain the CuCeSAPO-34 molecular sieve catalyst. Copper and cerium are introduced, a subsequent ion exchange step is avoided, the molecular sieve catalyst with different catalysis activities is obtained by using the cooperative effect of copper and cerium, controlling the addition amount of the cerium salt and adjusting the load capacity of cerium, and the preparation method has the advantages of good crystallinity and simple synthesis steps.

Description

technical field [0001] The invention belongs to the field of molecular sieve preparation, and in particular relates to a preparation method, product and application of CuCeSAPO-34 molecular sieve. Background technique [0002] Take NH 3 Selective Catalytic Reduction of NO as Reductant x i.e. NH 3 -SCR technology plays an extremely important role in the process of catalytic removal of NOx, and its key core is the development of SCR catalyst system. [0003] Nitrogen oxides (NO x ), whose main sources are mobile sources (motor vehicles, accounting for about 49%) and stationary sources (thermal power plants, industrial boilers, accounting for about 46%), which have caused serious pollution to the ecological environment and living environment. At present, the more mature flue gas denitrification technology in industrial application is the NH with vanadium-titanium series as the main catalyst. 3 -SCR technology, V 2 o 5 -WO 3 -TiO 2 Although catalysts have been used indu...

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): B01D53/86B01D53/56B01J29/85
CPCB01D53/8628B01J29/85
Inventor 陈建军高向平李俊华张亚青赵新红
Owner YANCHENG ENVIRONMENTAL ENG TECH RES & DEV CENT TSINGHUA UNIV
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