Methane combustion catalyst as well as preparation method and application thereof

A methane combustion and catalyst technology, applied in the direction of combustion methods, catalyst carriers, chemical instruments and methods, etc., can solve the problems of easy deactivation of methane catalysts, and achieve low catalyst cost, good hydrothermal stability, and low precious metal content Effect

Pending Publication Date: 2021-11-16
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

The disclosed methane catalyst is easily deactivated

Method used

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  • Methane combustion catalyst as well as preparation method and application thereof
  • Methane combustion catalyst as well as preparation method and application thereof
  • Methane combustion catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0069] This embodiment provides a methane combustion catalyst, the methane combustion catalyst includes active components Pd and Al 2 o 3 Carrier, the active component Pd content in the methane combustion catalyst accounts for 1wt.%; the Al 2 o 3 The carrier consists of γ-Al 2 o 3 Prepared by calcination at 550°C for 5 hours, the γ-Al 2 o 3 The average particle size is 50 μm.

[0070] The preparation method of described methane combustion catalyst comprises the steps:

[0071] (1) Al 2 o 3 Add the carrier into water, then add palladium nitrate with a Pd content of 40wt.%, stir and mix at 25°C for 3 hours, and perform rotary evaporation after mixing to obtain a solid product. The palladium nitrate, Al 2 o 3 The mass ratio of carrier and water is 0.125:5:30;

[0072] (2) The solid product in step (1) was dried at 110° C. for 12 hours and calcined at 550° C. for 5 hours to obtain the methane combustion catalyst.

[0073] Al described in this example 2 o 3 The XRD pa...

Embodiment 2

[0075] This embodiment provides a methane combustion catalyst, the methane combustion catalyst includes active components Pd and Al 2 o 3carrier, the active component Pd content in the methane combustion catalyst accounts for 0.1wt.%; the Al 2 o 3 The carrier consists of γ-Al 2 o 3 Prepared by calcination at 450°C for 24 hours, the γ-Al 2 o 3 The average particle size is 75 μm.

[0076] The preparation method of described methane combustion catalyst comprises the steps:

[0077] (1) Al 2 o 3 Add the carrier into a mixed solvent of deionized water and ethanol, then add palladium chloride with a Pd content of 5wt.%, stir and mix at 20° C. for 24 hours, and perform rotary evaporation after mixing to obtain a solid product. The palladium chloride, Al 2 o 3 The mass ratio of carrier, deionized water and ethanol is 0.12:6:50:25;

[0078] (2) The solid product in step (1) is dried at 140° C. for 1 h and calcined at 900° C. for 1 h in sequence to obtain the methane combusti...

Embodiment 3

[0080] This embodiment provides a methane combustion catalyst, the methane combustion catalyst includes active components Pd and Al 2 o 3 carrier, the active component Pd content in the methane combustion catalyst accounts for 1.5wt.%; the Al 2 o 3 The carrier consists of γ-Al 2 o 3 Prepared by calcination at 1000°C for 1 hour, the γ-Al 2 o 3 The average particle size is 25 μm.

[0081] The preparation method of described methane combustion catalyst comprises the steps:

[0082] (1) Al 2 o 3 Add the carrier into a mixed solvent of deionized water and methanol, then add potassium chloropalladate with a Pd content of 26wt.%, stir and mix at 40°C for 2 hours, and perform rotary evaporation after mixing to obtain a solid product, the potassium chloropalladate, Al 2 o 3 The mass ratio of carrier, deionized water and methanol is 0.16:2.7:20:5;

[0083] (2) The solid product in step (1) was dried at 100° C. for 13 hours and calcined at 450° C. for 24 hours to obtain the m...

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Abstract

The invention provides a methane combustion catalyst and a preparation method and application thereof, the methane combustion catalyst comprises an active component Pd and an Al2O3 carrier, and the Al2O3 carrier comprises 0-30 wt.% of SiO2; the content of the active component Pd in the methane combustion catalyst accounts for 0.1 to 2 weight percent. The preparation method comprises the following steps: dipping the Al2O3 carrier in a palladium-containing solution, carrying out rotary evaporation after dipping to obtain a solid product, and drying and roasting the solid product to obtain the methane combustion catalyst. The methane combustion catalyst provided by the invention has the advantages of low noble metal content, low catalyst cost, better hydrothermal stability and low-temperature activity, simple preparation method and easiness in industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of catalytic combustion catalysts, and relates to a methane combustion catalyst, in particular to a methane combustion catalyst and its preparation and application. Background technique [0002] Natural gas is widely used in fields such as natural gas vehicles and urban heating due to its abundant reserves, low price, convenient use and high thermal efficiency. But methane, the main component of natural gas, is a greenhouse gas. Therefore, the elimination of methane in natural gas vehicle exhaust or city gas exhaust has important research significance. The elimination of methane mainly includes flame combustion method and catalytic combustion method. Compared with the flame combustion method, the catalytic combustion method has the advantages of low ignition temperature, complete combustion, and a wide range of applicable methane concentrations, and has broad application prospects in the fields of exhaust ...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J21/12B01J32/00F23G7/07
CPCB01J23/44B01J21/12F23G7/07F23G2209/141
Inventor 贺泓李杰张燕单文坡
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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