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Catalyst for methane catalytic combustion and preparation method thereof

A methane catalytic combustion and catalyst technology, which is applied in the direction of combustion methods, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of complex catalyst preparation process, improve activity and high temperature thermal stability, prolong service life, The effect of inhibiting sintering

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process of the catalyst is slightly complicated

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The Pd-CeO provided by this embodiment 2 / Al 2 o 3 The preparation method of methane catalytic combustion catalyst is as follows:

[0075] (1) Preparation of Pd nanoparticles

[0076] Dissolve 20mg of potassium chloropalladate in 2mL of deionized water and stir to dissolve. Then 10 mL of acetone was added and mixed well, the solution changed from dark brown to orange red. Then about 8 mg of 11-mercaptoalkanoic acid was added to the above solution and stirred at room temperature until dissolved. Next, add 1 mL containing 20 mg NaBH to the clear solution 4 The solution. Immediately a black substance was deposited on the bottom of the container. Remove the supernatant, wash the black sediment at the bottom of the container with 10mL of methanol and 10mL of acetone, and then add 10mL of deionized water to fully disperse.

[0077] (2) Aqueous phase dispersion of Pd-CeO 2 Preparation of two-component nanostructures

[0078] 0.175mmol Ce(NO 3 ) 3 ·6H 2 O and 0.44m...

Embodiment 2

[0084] In the present embodiment, except adding Ce(NO 3 ) 3 ·6H 2 The amounts of O and L-arginine were 0.35mmol and 0.9mmol respectively (that is, the molar ratio of Ce to L-arginine was 1:2.5), and the rest were the same as the preparation method in Example 1.

[0085] For the catalyst prepared in this example, the loading of Pd is 0.57wt%, and the molar ratio of Pd to Ce is 1:5.5. The content and activity data of each component are listed in Table 1.

Embodiment 3

[0087] The only difference from Example 2 is that in step (2), the dispersion prepared in step (1) is added dropwise into solution A, and the temperature is controlled at 10° C. during the whole process of dropping and stirring. The content and activity data of each component of the obtained catalyst are listed in Table 1.

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Abstract

The invention provides a catalyst for methane catalytic combustion and a preparation method thereof. The catalyst comprises a carrier, palladium nanoparticles and cerium oxide, wherein the palladium nanoparticles and the cerium oxide are loaded on the carrier, and cerium oxide is bonded to part of the surfaces of the palladium nanoparticles. According to the structure, the oxidation state of Pd at high temperature can be maintained by using the oxygen storage and release performance of CeO2, and meanwhile, the sintering of Pd nanoparticles at high temperature can be effectively inhibited, so that the activity and high-temperature thermal stability of the catalyst are improved, and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the technical field of nanometer catalysts, and in particular relates to a catalyst for catalytic combustion of methane and a preparation method thereof. Background technique [0002] Methane (CH 4 ) is one of the main components of natural gas, which provides a lot of energy and heat for our daily life. However, the greenhouse effect of methane is much higher than that of CO 2 , so how to control its effective emission, especially low content CH 4 Gas emissions have become one of the issues worthy of attention. For example, in the process of oilfield mining or coal mining, as well as industrial plant production, CH 4 If these gases are directly discharged into the atmosphere, they will inevitably produce serious greenhouse effects over time. Therefore, how to effectively remove the low content of methane in the gas is very important. [0003] As one of the most stable alkanes in chemical structure, the direct combustion ...

Claims

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Application Information

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IPC IPC(8): B01J23/63F23G7/07
CPCB01J23/63B01J23/002F23G7/07B01J35/40
Inventor 杜辰昊陈航宁许丹丹郑育元陆捷
Owner CHINA PETROLEUM & CHEM CORP
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