Microflower-like Fe-Co-MOF with enhanced catalytic performance for decomposition of ammonium perchlorate and combustion of ammonium perchlorate-based composite propellants

• Published in: Case studies in thermal engineering Vol. 56; p. 104281
• Main Authors: Feng, Chenhe, Ye, Baoyun, Cheng, Wangjian, Shi, Songchao, Zhao, Fengqi, An, Chongwei, Wang, Jingyu
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2024; Elsevier
• Subjects: Ammonium perchlorate; Catalytic decomposition; Combustion; Fe-Co-MOF; Fe-Co-MOF; Combustion; Catalytic decomposition; Ammonium perchlorate
• ISSN: 2214-157X; 2214-157X
• DOI: 10.1016/j.csite.2024.104281

Ammonium perchlorate (AP) serves as a crucial component in solid propellants. Enhancing its thermal decomposition with catalysts improves the combustion performance of solid propellants significantly. To enhance the catalytic performance of metal-organic frameworks (MOFs) on AP, this study controlled the morphology of MOFs by adding metal atoms, resulting in a Fe-Co-MOF catalyst with higher specific surface area and dual-metal synergistic effect. The catalytic effect of the catalyst on AP was investigated using DSC and TG-IR, followed by studying its influence on the combustion performance of AP-based composite propellants. The results show that the introduction of 5% Fe-Co-MOF reduced the decomposition temperature of AP to 298.6 °C, decreased the activation energy to 151.6 kJ mol-1, and increased the heat release by 110.6%. Additionally, the ignition delay of the propellant decreased by 71 ms, and the combustion rate increased by 43.8%. Mechanistic studies demonstrate that the abundant catalytic sites and oxygen vacancies of Fe-Co-MOF facilitate the charge transfer rate during the AP thermal decomposition process and promote the increase in AP heat release by suppressing the high-temperature conversion of N2O. This research paves the way for enhancing the application of MOF materials in AP-based solid propellants. The bimetallic Fe-Co-MOF with synergistic effect can effectively catalyze AP thermal decomposition and combustion performance. [Display omitted] •Fe-Co-MOF contains the advantages of both bimetallic and MOF structures.•The high-temperature decomposition peak of Fe-Co-MOF/AP was reduced to 298.6 °C.•The rate of catalyst charge transfer affects the rate of AP decomposition.•Enhancing the heat release by inhibiting the high temperature conversion of N2O.