A kind of supported catalyst and its preparation method and application

A supported catalyst, ceramic carrier technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Achieve the effect of improving activity and stability, not easy to drop powder and cracking, and improving utilization rate

Active Publication Date: 2021-04-30
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the existing noble metal catalysts with poor thermal stability and chlorine-sulfur resistance, and to provide a catalyst that can improve the activity, thermal stability and chlorine-sulfur resistance of the catalyst. Performance and can improve the utilization rate of precious metals, reduce the cost of the supported catalyst and its preparation method and application

Method used

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  • A kind of supported catalyst and its preparation method and application
  • A kind of supported catalyst and its preparation method and application
  • A kind of supported catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) 500g of Al(NO 3 ) 3 9H 2 O was added to 1L of secondary water and dissolved completely. Take a cordierite honeycomb ceramic carrier with a volume size of 100mm×100mm×50mm (the SEM image of which is shown in figure 1 shown, from figure 1 It can be seen that the carrier has a microporous structure, and the cyanite pore structure is obvious, and it is composed of many tiny particles of 1-5 μm) dried at 100°C for 2.0h, and completely impregnated into the prepared Al(NO 3 ) 3 In the aqueous solution, the immersion time is 10min. impregnated Al(NO 3 ) 3 After the aqueous solution, the cordierite honeycomb ceramic carrier was taken out, and the excess solution inside the pores of the cordierite honeycomb ceramic carrier was blown off with an ear washing ball, then placed in an oven and dried at 120°C for 2.0h, and then transferred to a muffle furnace Calcined at 400°C for 4.0h.

[0036] (2) 86.82g of Ce(NO 3 ) 3 9H 2 O was added to 1L of secondary water and dis...

Embodiment 2

[0042] (1) 500g of Al(NO 3 ) 3 9H 2 O was added to 1L of secondary water and dissolved completely. A cordierite honeycomb ceramic carrier with a volume size of 100mm×100mm×50mm was dried at 100°C for 2.0h, and it was completely impregnated into the prepared Al(NO 3 ) 3 In the aqueous solution, the immersion time is 10min. Impregnated Al(NO 3 ) 3 After the aqueous solution, the cordierite honeycomb ceramic carrier was taken out, and the excess solution inside the pores of the cordierite honeycomb ceramic carrier was blown off with an ear washing ball, then placed in an oven and dried at 120°C for 2.0h, and then transferred to a muffle furnace Calcined at 500°C for 4.0h.

[0043] (2) 71.60g of 50% Mn (NO 3 ) 2 Add to 1L of secondary water and dissolve completely. The load obtained in step (1) has Al 2 o 3 The cordierite is completely impregnated in it, and the impregnation time is 10min. Impregnated Mn(NO 3 ) 2 After the aqueous solution, the cordierite was taken ...

Embodiment 3

[0047] (1) 500g of Al(NO3 ) 3 9H 2 O was added to 1L of secondary water and dissolved completely. A cordierite honeycomb ceramic carrier with a volume size of 100mm×100mm×50mm was dried at 100°C for 2.0h, and it was completely impregnated into the prepared Al(NO 3 ) 3 In the aqueous solution, the immersion time is 10min. Impregnated Al(NO 3 ) 3 After the aqueous solution, the cordierite honeycomb ceramic carrier was taken out, and the excess solution inside the pores of the cordierite honeycomb ceramic carrier was blown off with an ear washing ball, then placed in an oven and dried at 120°C for 2.0h, and then transferred to a muffle furnace Calcined at 400°C for 4.0h.

[0048] (2) 78.14g of Ce(NO 3 ) 3 9H 2 O and 7.16g of 50wt% Mn(NO 3 ) 2 Add to 1L of secondary water and dissolve completely. The load obtained in step (1) has Al 2 o 3 The cordierite is completely impregnated in it, and the impregnation time is 10min. Impregnated Ce(NO 3 ) 3 and Mn(NO 3 ) 2 A...

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Abstract

The invention relates to the field of catalysts, and discloses a supported catalyst, its preparation method and application. The method includes sequentially loading Al on the carrier 2 o 3 , activator and noble metal, the noble metal is at least one of Pt, Pd, Rh, Ru, Au and Ag, the way of loading the noble metal is to load Al 2 o 3 The carrier of the active auxiliary agent is shaken and immersed in a noble metal salt solution at a temperature ranging from room temperature to 100°C for 0.5-4h, dried and calcined; the noble metal salt solution is a mixed aqueous solution of a noble metal salt and hydrogen peroxide. The present invention supports alumina, coagents and precious metals in situ by impregnating and calcining, thereby enhancing the interaction between alumina, coagents and supports, improving the mechanical strength of the catalyst, The oxidation-reduction reaction promotes the uniform dispersion of the noble metal on the carrier, improves the dispersion of the noble metal, and enhances the interaction between the noble metal and the coagent. The obtained catalyst has good activity, thermal stability and chlorine-sulfur resistance.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a supported catalyst and its preparation method and application. Background technique [0002] Volatile organic compounds (VOCs) are important air pollutants that can enter the human body through the respiratory tract and skin, causing various acute and chronic health problems, and have the possibility of carcinogenic, teratogenic, and mutagenic. In addition, VOCs have photochemical activity, can produce ozone pollution, and form secondary airgel, which is one of the important precursors for the formation of atmospheric composite pollutants. As a big manufacturing country in my country, the production and consumption of petrochemical products are increasing year by year, and the pollution problem of VOCs is also becoming more and more serious. Although my country's VOCs emission control system has been gradually improved in recent years, the emissions are still increasing, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63B01J23/656B01J37/02B01J37/16B01D53/86B01D53/72
CPCB01D53/72B01D53/86B01D53/8668B01D2257/7027B01D2257/704B01D2257/708B01J23/002B01J23/63B01J23/6562B01J35/0093B01J37/0201B01J37/16B01J2523/00B01J2523/31B01J2523/3712B01J2523/72
Inventor 贾宏鹏许文建
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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