Combustion gas catalyst, catalytic burner as well as preparation methods and application thereof

A catalytic burner and combustion catalyst technology, applied in combustion methods, gas fuel burners, burners, etc., can solve the problems of inability to process gas appliances, practical application, limited service life, etc., and achieve long service life and stable performance. , to avoid the effect of tempering

Inactive Publication Date: 2013-05-22
惠州市奥能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent application with publication number CN1224047A discloses a catalyst for natural gas combustion, which is mainly composed of subgroup metals, alkaline earth metals and rare earth metals, which can convert HC, CO and NO x Reduced to less than 1ppm, but its use temperature is low and its life is short, so it cannot be practically applied
The Chinese patent application with the publication number CN133203A discloses a gas combustion catalyst, which is mainly composed of alkaline earth metals, noble metals and alumina, and has good low-temperature activity, but it is only suitable for methane concentrations of 0.4-4%,

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1 A gas catalyst

[0060] This embodiment provides a powder gas catalyst, which can be directly sprayed on the burner for use. In the present embodiment, choose to contain the SiO that mass fraction is 3% 2 and 97% Al 2 o 3 As the carrier, Pd is selected as the active component, and its mass accounts for 1.6% of the total mass of the finished gas catalyst.

[0061] The preparation method of above-mentioned gas catalyst is as follows:

[0062] (1) Prepare the carrier: take 7.4 grams of SiO with a mass fraction of 20% 2 Silica sol was diluted with 2L of deionized water, and then 349 g of Al(NO 3 ) 3 9H 2 O. After mixing evenly, drop it into the ammonium carbonate solution, filter and wash to obtain the carrier filter residue, dry the carrier filter residue and bake at 600°C for 4 hours to make the carrier of this embodiment; grind the carrier to obtain a particle size Particles smaller than 45 microns;

[0063] (2) Load the catalytically active componen...

Embodiment 2

[0068] Embodiment 2 A catalytic burner

[0069] This embodiment provides a catalytic burner, comprising a honeycomb ceramic sheet as a substrate and a surface combustion catalyst layer coated on the plane of the honeycomb ceramic sheet and an in-pore combustion catalyst layer embedded in the honeycomb hole wall of the honeycomb ceramic sheet . The above-mentioned surface combustion catalyst layer and in-pore combustion catalyst layer contain a gas catalyst with Pt as the catalytically active component, wherein the mass fraction of Pt is 5%. The above-mentioned gas catalyst contains SiO with a mass fraction of 9% respectively 2 and 91% Al 2 o 3 Made carrier.

[0070] The surface of the above-mentioned honeycomb ceramic sheet is provided with dot-shaped protrusions, and the combustion catalyst layer in the holes is embedded in the wall surface of the honeycomb hole by 2 mm.

[0071] Above-mentioned catalytic burner preparation steps are as follows:

[0072] (1) Prepare t...

Embodiment 3

[0079] Embodiment 3 A combustion catalytic converter

[0080] The combustion catalytic converter of this embodiment adopts a honeycomb ceramic sheet provided with lattice grooves on the upper surface as a substrate, and its specific preparation process includes the following steps:

[0081] (1) Preparation of carrier by precipitation method: take 2gSiO 2 Add silica sol into 1L of deionized water and mix evenly, then add aluminum nitrate that can obtain 40g of alumina after roasting and dissolve to obtain a mixed solution; slowly drop the aforementioned mixed solution into the ammonium carbonate solution and stir vigorously to obtain a white Slurry: filter and wash the white slurry, dry and roast at 600°C for 4 hours to obtain a carrier; grind the carrier into particles with a particle size of less than 45 microns;

[0082] (2) Add the carrier powder prepared in step 1 to the calculated amount of palladium nitrate solution, so that the final combustion catalyst contains pall...

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Abstract

The invention relates to a combustion gas catalyst, a preparation method and application thereof, a catalytic burner and a preparation method thereof. The combustion gas catalyst comprises a carrier, a catalytic active component and a modifier, wherein the carrier is mainly prepared from Al2O3, and the catalytic active component consists of either or both of Pt and Pd. The combustion gas catalyst disclosed by the invention has the characteristics that the catalytic activity is high, the performance is stable, no naked fire exists during burning, the burning is sufficient, toxic waste gases are hardly produced, and the like, and the service life is long under the normal working temperature of 1,100 DEG C. The catalytic burner disclosed by the invention has very high infrared radiation efficiency, polluting gases of burnt gas are few, the cost is low, the burner is less prone to backfiring, and the use safety performance of combustion gas is high, so that the catalytic burner can be applied to the manufacture of gas stoves, gas water heaters, gas heaters, gas boilers or industrial gas drying equipment and the like.

Description

technical field [0001] The invention relates to the technical field of catalytic combustion, in particular to a gas catalyst and a preparation method thereof, and also to a catalytic burner and a preparation method and application thereof. . Background technique [0002] Domestic consumption of liquefied petroleum gas and natural gas is increasing year by year, and these gases mainly release energy through traditional flame combustion. The heat energy of flame combustion is mainly convective heat energy, and radiation energy only accounts for a very small part. Convective heat transfer is carried out through the temperature difference and residence time between the convective heat (hot air, flame) and the heated object. Due to its short residence time, a large amount of its convective heat is consumed, so that the heat received by the appliance is large. In order to reduce, the thermal efficiency is low; at the same time, the flame combustion temperature is high (1500 degr...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J23/42B01J23/63F23D14/18
Inventor 林晓平魏增潘
Owner 惠州市奥能科技有限公司
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