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Un-equipartition combustion catalyst and method for preparing the same

A catalyst, catalytic combustion technology, used in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc.

Inactive Publication Date: 2008-02-06
HANERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For γ-Al 2 o 3 As a carrier, a catalyst for methanol and natural gas combustion that supports noble metals and has a non-uniform distribution of active components in the catalyst has not yet been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Dissolve palladium chloride in a small amount of high-concentration hydrochloric acid, and add water to make a solution with a concentration of 2 mol / L; soak the dried alumina pellets in the palladium chloride solution for 5 minutes, and the soaked The alumina pellets were dried in an oven at 80°C for 4h, and then transferred to a muffle furnace for calcination at 480°C for 4h to prepare the catalyst. The catalyst has an oxygen-to-carbon ratio of 2 and a total gas space velocity of 10000h -1 , the reaction was carried out under the condition that the amount of catalyst was 2ml. The weight of metal oxide in the catalyst accounts for 1%.

Embodiment 2

[0052] Dissolve palladium chloride in a small amount of high-concentration hydrochloric acid to make a solution with a concentration of 0.2 mol / L, and cobalt sulfate to make a solution with a concentration of 0.2 mol / L, mix the two solutions in equal volumes, and dry the alumina Immerse the pellets in the above mixed solution for 15 minutes, dry the impregnated alumina pellets in an oven at 80°C for 4 hours, and roast the dried alumina pellets in a muffle furnace at 580°C for 4 hours to prepare the catalyst . The weight of metal oxide in the catalyst accounts for 4%.

Embodiment 3

[0054] Dissolve palladium chloride in a small amount of high-concentration hydrochloric acid to make a solution with a concentration of 0.2 mol / L, and cobalt sulfate to make a solution with a concentration of 0.2 mol / L, mix the two solutions in equal volumes, and dry the alumina Immerse the pellets in the above mixed solution for 15 minutes, dry the impregnated alumina pellets in an oven at 80°C for 4 hours, and roast the dried alumina pellets in a muffle furnace at 560°C for 4 hours to prepare the catalyst . The weight of metal oxide in the catalyst accounts for 3%.

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Abstract

The present invention discloses a catalyst for the catalytic combustion of methanol, hydrogen, methane and natural gas. The present invention consists of a metal oxide active component occupying 0.01-5 percent of the catalyst weight and an alumina carrier occupying 99.99-95 percent of the catalyst weight. The preparation method of the catalyst is that: active alumina is firstly placed in alkaline precipitant for presaturation treatment, baked in a short time under high temperature, impregnated in the salt solution containing metal ions, dried and roasted to obtain the catalyst product. The evaluation result of using the catalyst shows that: the combustion point of gas is reduced; the conversion of gas is increased.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to catalytic combustion catalyst products and production methods thereof. Background technique [0002] Most of the catalysts currently used in industry are supported catalysts, and their active components are mainly noble metals, such as palladium or platinum, etc., and their active components are almost evenly distributed in the catalyst. In recent years, experiments have proved that many heterogeneously distributed catalysts have better activity, selectivity and longer lifetime than homogeneous catalysts. [0003] Chinese patent O1133374.X adopts the method that precious metal active component Pt is distributed on the outer surface of the honeycomb ceramic carrier coating by impregnation method through the competitive adsorption of organic acids. The coating composition of the honeycomb ceramic carrier is: active Al 2 o 3 20%~80%,TiO 2 10%~40%, CeO 2 5%~30%, ZrO 2 5% to 20%, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/40B01J23/74B01J23/89
Inventor 肖钢侯晓峰周帅林张新锋崔冰冰
Owner HANERGY TECH
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