在紧密包装的固体推进剂能量颗粒上对催化剂的监管:高燃烧性能与低温敏感性
Zhenhua Tang1,2, Suhang Chen, Hongsheng Yu3
1School of Chemical Engineering/Xi'an Key Laboratory of Special Energy Materials, Northwest University, Xi'an 710069, China.
Langmuir : the ACS journal of surfaces and colloids
|August 12, 2024
概括
这项研究通过将高效率催化剂与甲合并,开发了新的固体推进剂能量粒子. 新材料显著降低了燃烧速度的温度灵敏系数,提高了燃烧性能和安全性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 燃烧科学 燃烧科学
背景情况:
- 众所周知,燃烧催化剂可以提高固体推进剂 (SP) 的性能.
- 然而,它们对燃烧速率 (δ) 的温度灵敏系数的影响不太清楚.
- 在SP中实现低 δ 仍然是该领域的一个重大挑战.
研究的目的:
- 为了研究调节的温度灵敏系数燃烧速度 (δ) 在甲 (AP) 丰富的固体推进剂能量粒子 (SPPs).
- 通过用高效催化剂紧密包装AP来合成和表征新型SPP.
- 评估准备好的SPPs的燃烧性能和温度灵敏度.
主要方法:
- 制备石榴结构的SPP,包括AP/亚纤维素 (NC) /Al (SPP),SPP/CoWO4-rGO (SPP-Co),SPP/Bi2WO6-rGO (SPP-Bi) 和SPP/CuCo2O4/GO (SPP-Cu),使用电喷颗粒.
- 通过在恒定体积燃烧室在50,0和-40°C的温度下测量加压率来确定δ.
- 测量松散条的燃烧速度,分析峰值压力和压缩速度.
主要成果:
- 与SPP相比,SPP-Co,SPP-Bi和SPP-Cu的燃烧率分别增加了 (分别为11.1%,8.7%和24.0%).
- 催化SPP显示燃烧过程显著加速,峰值压力和压缩率在0°C时增加.
- 催化SPPs的δ值大幅下降:SPP-Co下降了26.6% (0-50 °C) 和19.5% (-40-0 °C);SPP-Bi下降了60.6% (0-50 °C) 和61.6% (-40-0 °C);SPP-Cu下降了24.7% (0-50 °C) 和27.6% (-40-0 °C).
- SPP-Bi 显示出最佳的 δ 调节,在 -40-50 °C 范围内降低了 61%.
结论:
- 开发的SPP有效地提高了燃烧性能,同时显著降低了温度灵敏度.
- Bi2WO6-rGO催化剂在降低燃烧速度的温度灵敏系数方面表现出卓越的性能.
- 这项研究提出了一种新的化学方法,通过将温度敏感的AP与高效的催化剂紧密集成来减少d.
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