GB/T 39718-2020 in English
VALIDHigh mass flux catalyst for hydrogen peroxide decomposition
- Issued on:2020-12-14
- Implemented on:2021-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$185.00
《GB/T 39718-2020高通量过氧化氢分解催化剂》由TC63(全国化学标准化技术委员会)归口,TC63SC10(全国化学标准化技术委员会化工催化剂分会)执行,主管部门为中国石油和化学工业联合会。
Introduction
Analysis of the core content of the standard
High-throughput hydrogen peroxide decomposition catalyst is a key material for aerospace propulsion systems, and its performance directly affects the efficiency of rocket engines. This standard defines the 7 core technical indicators of the catalyst, among which the requirements of decomposition efficiency ≥98% and starting response time ≤600ms reflect the stringent standards of aerospace-grade products.
Comparison of key technical indicators
| Performance parameters | Standard requirements | Test methods | Engineering significance |
|---|---|---|---|
| Silver mass fraction | ≥10.0% | ICP-OES method | Determine the density of catalytic active centers |
| Pressure bearing performance | ≥12.0MPa | 1980.5N pressure test | Ensure structural integrity under high pressure conditions |
| Start-up response time | ≤600ms | QJ3310 hot test | Influence on engine ignition reliability |
Innovation of test method
Determination of catalytic decomposition rate
The dynamic mass loss method is used: immerse a 20×20mm sample in a 90% hydrogen peroxide solution and record the time required for the mass to decrease by 20g. This method simulates the liquid phase mass transfer process during actual operation and is closer to the actual working conditions than traditional gas phase testing.
Hot test verification system
A three-level verification procedure is established based on the QJ3310 standard:
- 10s short-range test verifies starting performance
- 3 repeated tests assess durability
- 200s long-range test evaluates steady-state characteristics
Application Cases in Aerospace Engineering
In the hydrogen peroxide/kerosene engine, the catalyst must meet the following requirements:
- Chamber pressure roughness ≤5% to ensure combustion stability
- Decomposition efficiency ≥98% to ensure specific impulse performance
- Reused more than 3 times to reduce mission costs
Recommendations for the implementation of the standard
1. Raw material control: The silver loading process should ensure the uniform distribution of active components. 2. Process inspection: Each square meter of mesh needs to be inspected for appearance and pressure bearing performance. 3. Storage management: The humidity of vacuum packaging should be ≤10% to avoid oxidation of active components. 4. Application verification: New batches of products must pass a 200s hot test before installation.

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