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Non-uniform combustion catalyst and uses thereof

A combustion catalyst, non-uniformly distributed technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to achieve the effect of reducing ignition point and efficient utilization

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] Prepare rhodium sulfate, platinum nitrate, cobalt chloride, nickel nitrate, and chromium sulfate solutions with a concentration of 0.02mol / L solution, make 0.1mol / L solution of oxalic acid, and immerse the dried alumina pellets in the oxalic acid solution , the immersion time is 10 minutes, and the above impregnated γ-Al 2 o 3 The pellets were dried in an oven at 100°C for 5 minutes; the dried γ-Al 2 o 3 The pellets were immersed in the metal salt solution of equal volume mixed above for 10 minutes, and the pH value of the solution was controlled by hydrochloric acid and sodium hydroxide during the immersion process; the impregnated γ-Al 2 o 3 The pellets were taken out and dried at 80°C for 4 hours; the dried γ-Al 2 o 3 The pellets were calcined at 600°C for 4 hours to prepare the catalyst. The weight of metal oxide in the catalyst accounts for 5%.

Embodiment 2

[0052] Rhodium chloride is made into a solution with a concentration of 3mol / L; oxalic acid is made into a solution of 0.1mol / L, and the dried alumina pellets are immersed in the oxalic acid solution for 15 minutes. γ-Al 2 o 3 The pellets were dried in an oven at 120°C for 10 minutes; the dried γ-Al 2 o 3 The balls were immersed in the metal salt solution for 20 minutes, and the pH value of the solution was controlled by hydrochloric acid and sodium hydroxide during the immersion process; the impregnated γ-Al 2 o 3 The pellets were taken out and dried at 100°C for 4 hours; the dried γ-Al 2 o 3 The pellets were calcined at 500°C for 4 hours to prepare the catalyst. The weight of metal oxide in the catalyst accounts for 1%.

Embodiment 3

[0054] Make nickel chloride into a solution with a concentration of 0.005mol / L, chromium nitrate and cobalt sulfate into a 0.1mol / L solution, mix the three solutions 1:1:2, and make oxalic acid into a 0.2mol / L solution. The dried alumina pellets were immersed in the oxalic acid solution for 10 minutes, and the above impregnated γ-Al 2 o 3 The pellets were dried in an oven at 100°C for 10 minutes; the dried γ-Al 2 o 3 The pellets were immersed in the above metal salt solution for 15 minutes, and the pH value of the solution was controlled with hydrochloric acid and sodium hydroxide to be 6 during the immersion process; the γ-Al 2 o 3 The pellets were taken out and dried at 100°C for 3 hours; the dried γ-Al 2 o 3 The pellets were calcined at 500°C for 3 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 non-uniformly distributed combustion catalyst and the application thereof. The present invention belongs to the catalyst field, and in particular relates to the catalytic combustion catalyst product. The technical problem solved by the present invention is to provide the catalyst product with non-uniformly distributed active components and the preparation method. Another objective of the present invention is to apply the catalyst with non-uniformly distributed active components to the catalytic combustion reaction of methanol, methane and natural gas. The active components of the catalyst consist of one species or a plurality of species in palladium oxide, rhodium oxide, platinum oxide, cobalt oxide, nickel oxide and chromium oxide, and the active components are non-uniformly distributed in the catalyst in an eggshell-shape, of which the content occupies the 0.01-5 percent of the catalyst weight; the weight of an alumina carries occupies 95-99.99 percent. The present invention can decrease the combustion point of fuel, and can make the active component of precious metals utilized with high efficiency.

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 01133374.X adopts the method that the precious metal active component Pt is distributed on the outer surface of the honeycomb ceramic carrier coating by the impregnation method through the competitive adsorption of organic acids. The coating composition of the honeycomb ceramic carrier is by weight percentage: active Al 2 o 3 20%~80%,TiO 2 10%~40%, CeO 2 5%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/46B01J23/755
Inventor 肖钢侯晓峰周帅林张新锋崔冰冰
Owner HANERGY TECH
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