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Tourmalinite-containing composite methane catalyst

A catalyst, tourmaline technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, gas fuels, etc., to achieve the effects of reduced agglomeration, rational use of energy saving and emission reduction, and shortened reaction time

Active Publication Date: 2012-10-17
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a composite methane catalyst containing tourmaline and its preparation method, so that methane can be catalyzed and oxidized at a lower temperature, so as to solve the deficiencies in the preparation process and application of the existing methane catalyst

Method used

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  • Tourmalinite-containing composite methane catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) According to the molar ratio La:Ce:Co:Mn=9:1:5:5, weigh La(NO 3 ) 3 ·6H 2 O 16.30g, Ce(NO 3 ) 3 ·6H 2 O 1.80g, Co(NO 3 ) 2 ·6H 2 O 6.03g, mass concentration 50%Mn(NO 3 ) 2 Solution 7.34g (total metal molarity is 0.0817mol);

[0049] (2) Dissolve the nitrate weighed in the previous step in 60ml of deionized water, add 20.8g (0.098mol) of citric acid, and stir at room temperature for 1 hour to mix the ingredients evenly;

[0050] (3) Heat and stir in a water bath (80°C), the water evaporates continuously, gradually forming a sol, and continue stirring until the color of the colloid becomes darker, forming a wet gel;

[0051] (4) Let the wet gel treated in step (4) stand for 12 hours, dry and grind to obtain dry gel;

[0052] (5) The material was placed in a muffle furnace, roasted at 800° C. for 5 hours, cooled and then ground to obtain 10 grams of perovskite-type methane catalytic material. Exist in the form of composite oxide pairs La 0.9 Ce 0.1 co 0....

Embodiment 2

[0054] The difference between this embodiment and Example 1 is that 0.2 g of tourmaline (2.74 μm) (produced by Henan Xixia Company) was added after adding citric acid in step (2), and stirred at room temperature for 1 hour to obtain a mixed solution. Other steps and parameters are the same as in Example 1. Tianjin Xianquan Industry and Trade Development Co., Ltd. WFS3015 catalyst evaluation device.

[0055] attached by figure 1 Comparative example 1, 2 samples, the sample catalytic activity after adding tourmaline is higher, and methane light-off temperature reduces 15 ℃, and complete conversion temperature advances 25 ℃, thus can find out that adding tourmaline sample can effectively improve catalytic material catalysis Oxidation of methane activity.

Embodiment 3

[0057] The difference between this embodiment and Example 1 is that the Ce(NO 3 ) 3 ·6H 2 O is replaced by Sr(NO 3 ) 2 . Other steps and parameters are the same as in Example 1.

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Abstract

The invention relates to a tourmalinite-containing composite methane catalyst. The composite methane catalyst is prepared by compounding of a methane catalyst and tourmalinite, and the mass ratio of tourmalinite to the methane catalyst is 1:50-3:10. The methane catalyst contains a perovskite type methane catalyst, a hexaaluminate type methane catalyst or a metal oxide methane catalyst. According to the invention, the refined mineral material tourmalinite is used in the methane catalyst such that methane gas can be effectively and greatly activated, combustion efficiency and methane combustion rate are raised, production cost is low and the preparation technology is simple. The rare earth tourmalinite composite methane catalysis material provided by the invention can be widely applied in fields of catalytic combustion, industrial organic exhaust-gas treatment, automobile tail gas purification and the like, is of important and active significance for energy saving and emission reduction and reasonable usage of energy, and can bring to the nation with good economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the field of environmental protection materials, and is a mineral composite catalyst used for natural gas vehicle tail gas, industrial waste gas and air purification. The spontaneous electrical polarity of tourmaline is used to regulate the preparation process of the methane catalyst, which can solve the problem that the methane catalyst is prone to agglomeration during preparation. , the problem of the decrease of the specific surface area; in addition, the infrared radiation characteristics of tourmaline are used to effectively activate methane gas, reduce the light-off temperature of methane, and improve the catalytic activity of the catalyst. Background technique [0002] Methane is the most stable hydrocarbon, it is usually difficult to activate or oxidize, the combustion temperature is high, and a large amount of NO will be produced during the combustion reaction x , water vapor, and natural gas contains a small amount of...

Claims

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Application Information

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IPC IPC(8): B01J23/889C10L3/00
Inventor 薛刚梁金生王赛飞赵超越张学亮苑砚坤
Owner HEBEI UNIV OF TECH
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