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Hydrazine decomposition catalyst and preparation method thereof

A catalyst, titanium dioxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of not many catalysts for decomposing hydrazine, and achieve the effect of good catalytic activity

Inactive Publication Date: 2013-09-11
陈和平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of these catalysts usually needs to be prepared through multiple complicated steps such as impregnation, roasting, reduction, etc., and most of the hydrazine decomposition catalysts used commercially are developed and produced abroad, and there are not many hydrazine decomposition catalysts with independent intellectual property rights in my country.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Titanium dioxide and zirconium phosphate are mixed and kneaded in a ratio of 3:1 to prepare a composite carrier of titanium dioxide and zirconium phosphate. The composite carrier is calcined at 600°C for 4 hours, and then the composite carrier is ground into powder; three cobalt tetroxide, hydrogen selenide aqueous solution, nickel sulfate Prepare the precursor solution of the active component according to the molar ratio of cobalt, selenium and nickel as 9:2:2, mix and stir the precursor solution evenly to obtain a mixed precursor solution, add the composite carrier to the mixed precursor solution, and stir evenly to obtain Mix the slurry, add ammonia water precipitant to the mixed slurry so that the pH value of the mixed slurry reaches above 10, filter after standing for 2 hours, and dry the solid phase at 80°C for 10h; then bake at 500°C for 4 hours under an inert gas atmosphere to obtain a catalyst. When the catalyst is used in the hydrazine decomposition reaction, i...

Embodiment 2

[0015] Titanium dioxide and zirconium phosphate are mixed and kneaded in a ratio of 3:2 to prepare a composite carrier of titanium dioxide and zirconium phosphate. The composite carrier is roasted at 650°C for 5 hours, and then the composite carrier is ground into powder; three cobalt tetroxide, hydrogen selenide aqueous solution, nickel sulfate The precursor solution of the active component is prepared according to the molar ratio of cobalt, selenium and nickel as 10:3:3, the precursor solution is mixed and stirred evenly to obtain a mixed precursor solution, the composite carrier is added to the mixed precursor solution, and stirred evenly to obtain Mix the slurry, add ammonia water precipitant to the mixed slurry so that the pH value of the mixed slurry reaches above 10, filter after standing for 2.5 hours, and dry the solid phase at 100°C for 11h; then bake at 600°C for 4.5 hours under an inert gas atmosphere to obtain a catalyst. When the catalyst is used in the hydrazine ...

Embodiment 3

[0017] Titanium dioxide and zirconium phosphate are mixed and kneaded in a ratio of 4:3 to prepare a composite carrier of titanium dioxide and zirconium phosphate. The composite carrier is calcined at 700°C for 6 hours, and then the composite carrier is ground into powder; three cobalt tetroxide, hydrogen selenide aqueous solution, nickel sulfate The precursor solution of the active component is prepared according to the molar ratio of cobalt, selenium and nickel as 12:4:3, the precursor solution is mixed and stirred evenly to obtain a mixed precursor solution, the composite carrier is added to the mixed precursor solution, and stirred evenly to obtain Mix the slurry, add ammonia water precipitant to the mixed slurry, so that the pH value of the mixed slurry reaches above 10, filter after standing for 3 hours, and dry the solid phase at 120°C for 12h; then bake it at 700°C for 5 hours under an inert gas atmosphere to obtain a catalyst. When the catalyst is used in the hydrazine...

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Abstract

The invention relates to a catalyst and a preparation method thereof, and particularly relates to a hydrazine decomposition catalyst and a preparation method thereof. A hydrazine decomposition catalyst adopts a composite carrier of titanium dioxide and zirconium phosphate, the mass ratio of titanium dioxide to zirconium phosphate is 3:1-5:2, and the catalyst comprises the following active components in percentage by weight: 9-12% of cobalt, 2-4% of selenium, 2-3% of nickel, and the balance of the composite carrier. When the catalyst is applied to a hydrazine decomposition reaction, hydrazine can be completely decomposed at room temperature, and the selectivity of a hydrazine decomposition product hydrogen can reach 95% at a temperature of 300 DEG C.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a hydrazine decomposition catalyst and a preparation method thereof. Background technique [0002] Hydrazine, also known as hydrazine (molecular formula: N 2 h 4 , or H 2 N-NH 2 ), also generally refers to the hydrogen substituted derivatives in hydrazine, which is an important chemical raw material. Hydrazine is a stable chemical substance at normal temperature, and thermal decomposition reaction can occur at about 250°C. Under the action of a catalyst, decomposition reactions can occur at lower temperatures to produce a large amount of high-temperature and high-pressure gas. This high-energy gas is mainly used for the satellite's attitude control propulsion system and auxiliary systems for satellite speed regulation, orbit entry, fixed point and attitude. control. Since the hydrazine decomposition propulsion system has good catalytic decomposition characteris...

Claims

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Application Information

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IPC IPC(8): B01J27/057C01B3/04
CPCY02E60/36
Inventor 陈和平
Owner 陈和平