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Catalyst for catalyzing ammonium perchlorate, preparation method and application

A technology of ammonium perchlorate and catalyst, which is applied in the field of solid propellant catalysts, can solve the problems of engine casing and other component vibration, reduce the energy level of solid propellant, and reduce the reliability of aircraft, so as to reduce unstable combustion and suppress Effect of unstable combustion and low cost

Active Publication Date: 2022-05-06
XIAN MODERN CHEM RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unstable combustion of solid propellants will cause vibration of the engine casing and other components, reducing the reliability of the aircraft, and even leading to mission failure in severe cases
In conventional methods, the unstable combustion of solid propellants is generally suppressed by adding high melting point materials (Journal of Explosives and Explosives, 2016.39 (2) 92-97), but the addition of high melting point materials will reduce the overall energy level of solid propellants

Method used

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  • Catalyst for catalyzing ammonium perchlorate, preparation method and application
  • Catalyst for catalyzing ammonium perchlorate, preparation method and application
  • Catalyst for catalyzing ammonium perchlorate, preparation method and application

Examples

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Embodiment 1

[0040] This example provides a catalyst for catalyzing ammonium perchlorate with a CuO loading of 0.5 wt% on a silica-alumina molecular sieve and a preparation method thereof. The preparation of 0.5% CuO / HZSM-5 composite catalyst and its catalytic performance in the decomposition reaction of ammonium perchlorate are as follows:

[0041] Take 0.5g of silica-alumina molecular sieve (HZSM-5), add 5mL of ultrapure water (18.2Mpa) and stir evenly to prepare a uniform silica-alumina molecular sieve solution, add 395.6uL of Cu(NO 3 ) 2 Standard solution (0.1mol / L), stirred for 20min, dried at 80°C, and finally roasted at 400°C for 2h under air atmosphere to obtain a composite catalyst of 0.5%CuO / HZSM-5,

[0042] SEM image see Figure 1b , the SEM image shows the structure of the catalyst and its structure and Figure 1a The silica-alumina molecular sieve is the same as HSZM-5, mainly silica-alumina molecular sieve. From the SEM image, it can be seen that the length of the catalyst ...

Embodiment 2

[0046] The present embodiment provides the preparation of the composite catalyst of 1%CuO / HZSM-5 and its catalytic performance in ammonium perchlorate decomposition reaction, specifically as follows:

[0047] Take 0.5g of silica-alumina molecular sieve (HZSM-5), add 5mL of ultrapure water (18.2Mpa) and stir evenly to prepare a uniform silica-alumina molecular sieve solution, add 395.6uL of Cu(NO 3 ) 2 Standard solution (0.1mol / L), stirred for 20min, dried at 80°C, and finally calcined at 400°C under air atmosphere to obtain a composite catalyst of 1% CuO / HZSM-5.

[0048] SEM image see Figure 1c , the SEM image shows the structure of the catalyst and its structure and Figure 1a Consistent, mainly silicon-alumina molecular sieves. From the SEM image, it can be seen that the length of the catalyst is 1-3 μm, and the width is 0.7-0.9 μm. Figure 1f In the XPS spectrum of 1% CuO / HZSM-5, we can see the weak energy spectrum of CuO under this condition, which shows that CuO is eve...

Embodiment 3

[0053] Embodiment 3 (comparative example 2)

[0054] The present embodiment provides the preparation of the composite catalyst of 5%CuO / HZSM-5 and its catalytic performance in ammonium perchlorate decomposition reaction, specifically as follows:

[0055] Take 0.5g of silica-alumina molecular sieve (HZSM-5), add 5mL of ultrapure water (18.2Mpa) and stir evenly to prepare a homogeneous silica-alumina molecular sieve solution, add 791.2uL of Cu(NO 3 ) 2 Standard solution (0.1mol / L), stirred for 20min, dried at 80°C, and finally calcined at 400°C under air atmosphere to obtain a composite catalyst of 5% CuO / HZSM-5.

[0056] SEM image see Figure 1d , the catalyst structure is shown in the SEM image. It can be seen that the structure of the molecular sieve has changed significantly under this condition. The typical cube of the molecular sieve has become a small cone with a length of about 1um. This is mainly due to the increase of Cu(NO 3 ) 2 The content increases, and a large ...

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Abstract

The invention discloses a catalyst for catalyzing ammonium perchlorate as well as a preparation method and application thereof.The composite catalyst comprises a carrier and a single carrier loaded on the carrier, the carrier is a molecular sieve, the single carrier is a transition metal oxide, the molecular sieve is a silicon-aluminum molecular sieve, the single carrier is CuO, and the single carrier is aluminum oxide. The mass content of the silicon-aluminum molecular sieve and the CuO is 0.5 wt%-10 wt%. The catalyst is easy to prepare, good in repeatability and low in price, the preparation cost of the catalyst is reduced, and the catalyst has a very good application prospect. Meanwhile, the catalyst adopts a high-melting-point material as a carrier, so that the unstable combustion phenomenon of a solid propellant is expected to be further inhibited, and the energy level of the solid propellant is improved.

Description

technical field [0001] The invention belongs to the field of solid propellant catalysts, in particular to a catalyst for catalyzing ammonium perchlorate, a preparation method and an application. Background technique [0002] Compared with liquid engines, solid engines have a series of advantages such as simple structure, convenient use and maintenance, long storage period, high working reliability, and high mass ratio. They are the source of flight power for space vehicles, tactical rocket weapons, and strategic rocket weapons. Essentially, a solid propellant is a complex system composed of oxidizers, binders, plasticizers, etc. The decomposition and combustion characteristics of energy components represented by oxidizers will directly affect the overall performance of solid propellants. [0003] Ammonium perchlorate (AP) is currently the main oxidizer for solid propellants. In some conventional tactical solid propellants, the mass proportion of ammonium perchlorate (AP) r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B29/22C06D5/06
CPCC06B23/007C06B29/22C06D5/06
Inventor 王正明赵凤起高红旭陈雪莉王瑛曲文刚付青山尚帆杨利
Owner XIAN MODERN CHEM RES INST
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