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Catalyst with non-oxide as carrier and application thereof

A non-oxide and catalyst technology, applied in physical/chemical process catalysts, compressed gas generation, chemical/physical processes, etc., can solve the problems that silicon carbide or silicon nitride catalysts have not been reported, and achieve good catalytic decomposition activity and low-temperature activity, mild reaction conditions, and wide synthesis temperature range

Active Publication Date: 2012-07-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] So far, the application of silicon carbide or silicon nitride catalysts to the decomposition of nitrous oxide has not been reported

Method used

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  • Catalyst with non-oxide as carrier and application thereof
  • Catalyst with non-oxide as carrier and application thereof
  • Catalyst with non-oxide as carrier and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]Preparation of SiC carrier: Dissolve 12.5g of glucose in 15mL of water, then pour it into 50mL of ethanol solution containing 8.5g of VTMS to form a mixture; add 0.4g of citric acid and 0.2g of ferric nitrate, stir rapidly at 30°C for 24 hours to form a gel, and dried overnight at 80°C; then calcined at 1400°C for 10 hours under an argon atmosphere, and 800°C for 2 hours under an air atmosphere, soaked in 30wt% NaOH, washed, and dried to obtain a SiC carrier. The obtained carrier has a typical silicon carbide structure with a large specific surface of 42.1m 2 g -1 , its XRD results are as follows figure 1 As shown, the specific surface results are shown in Table 1.

Embodiment 2

[0045] Compared with Example 1, the difference is that the gelling reaction temperature is 50° C., and the amount of other materials and operating conditions are the same as in Example 1. The specific surface results are shown in Table 1.

Embodiment 3

[0047] Compared with Example 1, the difference is that the gelling reaction temperature is 80° C., and the amount of other materials and operating conditions are the same as in Example 1. The specific surface results are shown in Table 1.

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Abstract

The invention relates to a catalyst with a non-oxide as a carrier and the application thereof. The catalyst is used for decomposition of nitrous oxide. The carrier of the catalyst is silicon carbide or silicon nitride. Active metal is one or a mixture of more than one of VIII group or IB group metal, and the mass percent of the active metal in the catalyst is within 1 to 30%. The catalyst can effectively decompose a nitrous oxide single-element propellant, the initial decomposition temperature is within 200 to 300 DEG C, and the complete decomposition temperature is within 350 to 450 DEG C; moreover, as high-temperature (within 1,300 to 1,500 DEG C) roasting treatment is carried out on the carrier of the catalyst, the catalyst has good high-temperature stability.

Description

technical field [0001] The present invention relates to a kind of non-oxide carrier catalyst for the decomposition of nitrous oxide and its application, in particular, relates to a catalyst with silicon carbide or silicon nitride as carrier and VIII group or IB group metal as active catalyst. The catalyst has excellent nitrous oxide monopropellant decomposition activity and high temperature stability. Background technique [0002] Non-toxic, non-polluting, high-performance, low-cost propulsion technology has become the development trend in the field of international aerospace propulsion, and nitrous oxide is a new type of green propellant with its own unique properties. It has a high storage density and can be stored in the form of liquid for a long time; it has a high saturated vapor pressure, which can realize the self-pressurization of raw material supply, so that the system is greatly simplified; it is non-toxic and compatible with general structural materials Well, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/224B01J27/24C06D5/04
Inventor 吕飞丛昱王晓东张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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