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A kind of methane catalytic combustion catalyst and preparation method thereof

A methane catalytic combustion and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low catalytic activity of catalysts and poor high temperature stability, so as to improve catalytic activity and high temperature Stability, the effect of maintaining high temperature stability

Active Publication Date: 2019-07-26
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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  • A kind of methane catalytic combustion catalyst and preparation method thereof
  • A kind of methane catalytic combustion catalyst 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 methane catalytic combustion catalyst and a preparation method thereof. The catalyst includes a carrier and an active component loaded on the carrier. The outer part of the active component is coated with a coating layer that provides oxygen vacancies for it. The catalyst is also Including the catalytic promoter cerium-zirconium solid solution, on the one hand, by coating the coating layer on the outside of the active component, it is beneficial for the oxygen molecules stored in the coating layer to be transferred to the active component in time, thereby maintaining the active component of the catalyst. high temperature stability; on the other hand, the catalyst of the present invention also includes a catalytic promoter cerium-zirconium solid solution, which can generate more oxygen vacancies, and can store and release oxygen in time and effectively, thereby also improving the catalyst activity group. In addition, the cladding layer, the cerium-zirconium solid solution and the carrier are dispersed and contacted with each other, which plays a mutual barrier effect, inhibits the sintering of the carrier, and improves the high-temperature thermal stability and catalytic activity of the catalyst.

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 Patents(China)
IPC IPC(8): B01J23/63B01J37/02B01J37/08B01J37/03B01D53/86B01D53/72
CPCB01D53/8668B01J23/002B01J23/63B01J37/0201B01J37/0207B01J37/0228B01J37/035B01J37/08B01J37/088B01J2523/00B01J35/393B01J35/23B01J35/398B01J35/615B01J2523/31B01J2523/3706B01J2523/3712B01J2523/48
Inventor 肖益鸿郑勇张旭蔡国辉钟富兰江莉龙
Owner FUZHOU UNIV
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