A kind of nanowire aerogel denitration catalyst with high sulfur resistance performance and preparation method thereof

A denitration catalyst and nanowire technology, which is applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex preparation process, toxic temperature of vanadium-based catalysts, and easy catalytic activity decline. High catalytic activity, less generation, and the effect of promoting adsorption and activation

Active Publication Date: 2022-07-15
UNIV OF SCI & TECH BEIJING
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved is: in the current denitrification catalyst, the vanadium-based catalyst is poisonous and requires a high temperature, and the catalytic activity of the low-temperature SCR catalyst is likely to be affected by SO 2 And serious decline, and the preparation process is complicated

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
  • A kind of nanowire aerogel denitration catalyst with high sulfur resistance performance and preparation method thereof
  • A kind of nanowire aerogel denitration catalyst with high sulfur resistance performance and preparation method thereof
  • A kind of nanowire aerogel denitration catalyst with high sulfur resistance performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] A preparation method of a nanowire aerogel denitration catalyst with high sulfur resistance is used for preparing the above denitration catalyst, and comprises the following steps:

[0038] Step 1: prepare anisotropic growth-promoting solution, the anisotropic growth-promoting solution is a mixed aqueous solution of sulfate and thiosulfate, and the amount of thiosulfate in the solution is greater than the amount of sulfate; this is for Make sure that the hydrogel can be successfully formed during the hydrothermal reaction. In the present application, ammonium thiosulfate and ammonium sulfate are used to prepare the anisotropic growth promoting solution, and the ratio of the amount of ammonium thiosulfate and ammonium sulfate is 1-4.

[0039] Step 2: Add the sulfate of the active element to the anisotropic growth promoting solution and stir well to dissolve it, then add the nitrate or acetate of the auxiliary element and stir well to dissolve it. In this application, th...

Embodiment 1

[0047] Step 1: Dissolve ammonium thiosulfate and ammonium sulfate with a molar ratio of 4:1 in deionized water, and stir evenly;

[0048] Step 2: dissolving manganese sulfate and ferric nitrate with a molar ratio of 10:1 into the solution obtained in step 1, and vigorously stirring until completely dissolved;

[0049] Step 3: transfer the mixed solution obtained in step 2 to a hydrothermal reaction kettle, heat it with water at 150°C for 12h, then heat it up to 200°C for 36h, and naturally cool to room temperature to form a hydrogel;

[0050] Step 4: The hydrogel obtained in Step 3 was washed with deionized water until neutral, then freeze-dried, and calcined at 400 °C for 3 h to prepare a nanowire aerogel catalyst with rich pore structure.

Embodiment 2

[0052] Step 1: Dissolve ammonium thiosulfate and ammonium sulfate with a molar ratio of 3:1 in deionized water, and stir evenly;

[0053] Step 2: dissolving manganese sulfate and cobalt nitrate with a molar ratio of 8:1 into the solution obtained in step 1, and vigorously stirring until completely dissolved;

[0054] Step 3: transfer the mixed solution obtained in step 2 into a hydrothermal reaction kettle, heat with water at 170°C for 12h, then heat up to 200°C for 48h, and naturally cool to room temperature to form a hydrogel;

[0055] Step 4: Wash the hydrogel obtained in Step 3 with deionized water to neutrality, then supercritically dry it at 450°C N 2 The nanowire aerogel catalyst with rich pore structure can be prepared by atmospheric calcination for 3 h.

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

PropertyMeasurementUnit
porosityaaaaaaaaaa
denitrification rateaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of catalysts comprising metals or metal oxides or hydroxides, and discloses a nanowire aerogel denitration catalyst with high sulfur resistance and a preparation method thereof. Line Aerogel. In the present invention, nanowire aerogel is used as denitration catalyst, and the special structure of nanowire will weaken the adsorption capacity of nitrate species on the catalyst, which is NH 3 Adsorption provides more active sites and promotes NH 3 adsorption activation, effectively inhibiting SO 2 adsorption on the catalyst, so that the catalyst in SO 2 It can still show high catalytic activity in the presence of . The catalyst is not only loose and porous, has good dispersion performance and large specific surface area, but also is extremely convenient for processing and loading. In the present invention, sulfate ions and thiosulfate ions are used as nanowire anisotropic growth promoters, and the catalyst is prepared by one-step hydrothermal reaction, and the preparation process is extremely simple.

Description

technical field [0001] The present invention relates to the technical field of catalysts containing metal or metal oxides or hydroxides, in particular to a nanowire aerogel denitration catalyst with high sulfur resistance and a preparation method thereof. Background technique [0002] With the development of human social productivity, the demand for energy is also getting higher and higher, and the use of energy is often accompanied by the production of nitrogen oxides, including nitrogen oxides released from nitrogen in fossil fuels, and air in high temperature environments. The nitrogen oxides produced by the reaction of nitrogen and oxygen in the medium, and the nitrogen oxides produced by the reaction of nitrogen and oxygen in the air that is broken down during discharge. These nitrogen oxides cause acid rain and photochemical smog, which seriously endanger human health. [0003] At present, the more mature denitration method is to use ammonia or urea to catalyze the re...

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): B01J23/889B01J23/34B01J35/10B01J37/03B01J37/08B01J37/10B01J37/32B01D53/86B01D53/56
CPCB01J23/8892B01J23/34B01J35/0013B01J35/1014B01J35/1019B01J37/10B01J37/036B01J37/32B01J37/082B01D53/8628
Inventor 唐晓龙王成志高凤雨易红宏赵顺征
Owner UNIV OF SCI & TECH BEIJING
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