Catalyst for catalyzing methane combustion and preparation method thereof

A methane catalytic combustion and catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor high temperature stability, low catalytic activity of catalysts, etc. Catalytic activity, the effect of prolonging the service life

Active Publication Date: 2017-10-20
FUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of poor high temperature stability and low catalytic activity of the methane catalytic combustion catalyst in the prior art, thereby providing a methane catalytic combustion catalyst with good high temperature stability and high catalytic activity, and further providing its preparation method

Method used

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  • Catalyst for catalyzing methane combustion and preparation method thereof
  • Catalyst for catalyzing methane combustion and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method of the methane catalytic combustion catalyst provided by the present embodiment comprises the following steps:

[0044] (1) Preparation of carrier

[0045] Weigh 18.7g La(NO 3 ) 3 ·6H 2 O was dissolved in 160mL deionized water to make a solution, and then weighed 200g of 90 mesh γ-Al 2 o 3 , its water absorption rate was measured to be 80%, and the above solution was impregnated with γ-Al by equal impregnation method. 2 o 3 , and then collect the solid phase, which is dried at 150°C for 3h and calcined at 600°C for 4h, which is the alumina carrier modified by lanthanum oxide (La 2 o 3 / Al 2 o 3 ), the mass ratio of lanthanum oxide and aluminum oxide in the above-mentioned carrier is 6:100;

[0046] (2) Preparation of ceria-coated active component solution

[0047] Get 2g mean particle diameter and be the noble metal palladium particle of 2 nanometers, and be dissolved in 50mL tetrahydrofuran solution, obtain solution A after adding 2.05...

Embodiment 2

[0057] The preparation method of the methane catalytic combustion catalyst provided by the present embodiment comprises the following steps:

[0058] (1) Preparation of carrier

[0059] Weigh 16.7g La(NO 3 ) 3 ·6H 2 O was dissolved in 160mL deionized water to make a solution, and then weighed 200g of κ-Al with a mesh number of 100 2 o 3 , the water absorption rate was measured to be 80%, and the above solution was impregnated with κ-Al 2 o 3 , and then collect the solid phase, which is dried at 140°C for 4h and calcined at 900°C for 3h, which is the alumina carrier modified by lanthanum oxide (La 2 o 3 / Al 2 o 3 ), the mass ratio of lanthanum oxide and aluminum oxide in the above-mentioned carrier is 3:100;

[0060] (2) Preparation of ceria-coated active component solution

[0061] Get 2g of noble metal platinum particles with an average particle diameter of 3 nanometers, and dissolve it in 50mL of tetrahydrofuran solution, add 1.41g of mercaptosuccinic acid to the ...

Embodiment 3

[0071] The preparation method of the methane catalytic combustion catalyst provided by the present embodiment comprises the following steps:

[0072] (1) Preparation of carrier

[0073] Weigh 18.7g La(NO 3 ) 3 ·6H 2 O was dissolved in 160mL deionized water to make a solution, and then weighed 200g of 80 mesh θ-Al 2 o 3 , its water absorption rate was measured to be 80%, and the above solution was impregnated with θ-Al by equal impregnation method. 2 o 3 , and then collect the solid phase, which is dried at 160°C for 2h and calcined at 500°C for 5h, which is the alumina carrier modified by lanthanum oxide (La 2 o 3 / Al 2 o 3 ), the mass ratio of lanthanum oxide and aluminum oxide in the above-mentioned carrier is 10:100;

[0074] (2) Preparation of ceria-coated active component solution

[0075] Take 2g of noble metal indium particles with an average particle diameter of 1 nanometer, and dissolve it in 50mL of tetrahydrofuran solution, add 1.39g of mercaptocaproic ac...

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Abstract

The invention provides a catalyst for catalyzing methane combustion and a preparation method thereof. The catalyst comprises a carrier, and an active component which is loaded on the carrier, wherein the active component is wrapped with a wrapping layer for providing oxygen vacancy. The catalyst further comprises a catalyst promotor which is a ceria-zirconia solid solution. According to the catalyst, the wrapping layer wraps the active component, so that oxygen molecule stored in the wrapping layer can be timely conveyed to the active component, so that the high-temperature stability of the active component of the catalyst is maintained; in addition, the catalyst further comprises the catalyst promotor which is the ceria-zirconia solid solution capable of generating more oxygen vacancies and timely effectively storing and discharging oxygen, so that the high-temperature stability of the active component of the catalyst is improved; in addition, the wrapping layer, the ceria-zirconia solid solution and the carrier are mutually dispersed and in contact, so that the mutual insulation effect is achieved, and the sintering of the carrier is inhibited, and as a result, the high-temperature thermal stability and the catalyzing activity of the catalyst can be improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a methane catalytic combustion catalyst and a preparation method thereof. Background technique [0002] Methane is a stable hydrocarbon with a regular tetrahedral molecular structure (C-H bond energy 413kJ / mol). There is a large amount of low-concentration methane in mine ventilation (VAM), which cannot be carried out by traditional combustion and is difficult to recover. In the process of oil and coal mining, there will be a large amount of oilfield associated gas and coalbed methane. Due to the constraints of technical means, and the associated gas is relatively difficult to control in the process of oilfield and coal mining, a large part of oilfields containing low concentration methane ( or coal bed methane) associated gas is evacuated, in addition, there will always be a large amount of methane-containing gas emitted from industrial purge gas. If the methane g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J37/02B01J37/08B01J37/03B01D53/86B01D53/72
CPCB01D53/8668B01J23/002B01J23/63B01J35/0013B01J35/006B01J35/0086B01J35/1019B01J37/0201B01J37/0207B01J37/0228B01J37/035B01J37/08B01J37/088B01J2523/00B01J2523/31B01J2523/3706B01J2523/3712B01J2523/48
Inventor 肖益鸿郑勇张旭蔡国辉钟富兰江莉龙
Owner FUZHOU UNIV
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