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CoMn‐Spinel Oxides as Supported Catalyst for Rocket‐Grade Hydrogen Peroxide Decomposition
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2020-08-06 , DOI: 10.1002/prep.202000020 Luís Gustavo Ferroni Pereira 1 , Leandro José Maschio 2 , Emmanuel Péres de Araújo 3 , Leonardo Henrique Gouvêa 1 , Ricardo Vieira 2
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2020-08-06 , DOI: 10.1002/prep.202000020 Luís Gustavo Ferroni Pereira 1 , Leandro José Maschio 2 , Emmanuel Péres de Araújo 3 , Leonardo Henrique Gouvêa 1 , Ricardo Vieira 2
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This work presents the application of a cobalt and manganese mixed oxides‐based catalyst with spinel structure to the decomposition of the storable green monopropellant H2O2 90 wt%. The 5.4 % Co0.5Mn2.5O4/Al2O3 catalyst was tested in a series of continuous and pulsed 2 N thruster firings, yielding a fast and repetitive performance, spontaneously and completely decomposing H2O2 90 wt% without undergoing deactivation or fragmentation during the tests. A specific impulse of 104 s and a characteristic velocity of 881 m/s were reached, so that the characteristic velocity efficiency amounted to 93.7 %. The adiabatic decomposition temperature of the monopropellant (756 °C) was also reached, thus evidencing the effectiveness of the 5.4 % Co0.5Mn2.5O4/Al2O3 catalyst. Its excellent activity in the decomposition of H2O2 90 wt% was attributed to the presence of the redox pairs Mn2+/Mn3+ and Co2+/Co3+, therefore making it a feasible material for low and medium thrust propulsive systems.
中文翻译：
CoMn-Spinel氧化物作为火箭级过氧化氢分解的载体催化剂
这项工作介绍了具有尖晶石结构的钴和锰的混合氧化物基催化剂在可存储的绿色单推进剂H 2 O 2 90 wt％的分解中的应用。在一系列连续和脉冲2 N推进器燃烧中测试了5.4％Co 0.5 Mn 2.5 O 4 / Al 2 O 3催化剂，产生了快速，重复的性能，自发且完全分解了H 2 O 290％（重量），在测试过程中不发生失活或断裂。达到了104 s的比脉冲和881 m / s的特征速度，因此特征速度效率达到93.7％。还达到了单推进剂的绝热分解温度（756°C），从而证明了5.4％Co 0.5 Mn 2.5 O 4 / Al 2 O 3催化剂的有效性。其在H 2 O 2 90 wt％分解中的出色活性归因于存在氧化还原对Mn 2+ / Mn 3+和Co 2+ / Co 3+因此，使其成为中低推力推进系统的可行材料。
更新日期：2020-10-05
中文翻译：
CoMn-Spinel氧化物作为火箭级过氧化氢分解的载体催化剂
这项工作介绍了具有尖晶石结构的钴和锰的混合氧化物基催化剂在可存储的绿色单推进剂H 2 O 2 90 wt％的分解中的应用。在一系列连续和脉冲2 N推进器燃烧中测试了5.4％Co 0.5 Mn 2.5 O 4 / Al 2 O 3催化剂，产生了快速，重复的性能，自发且完全分解了H 2 O 290％（重量），在测试过程中不发生失活或断裂。达到了104 s的比脉冲和881 m / s的特征速度，因此特征速度效率达到93.7％。还达到了单推进剂的绝热分解温度（756°C），从而证明了5.4％Co 0.5 Mn 2.5 O 4 / Al 2 O 3催化剂的有效性。其在H 2 O 2 90 wt％分解中的出色活性归因于存在氧化还原对Mn 2+ / Mn 3+和Co 2+ / Co 3+因此，使其成为中低推力推进系统的可行材料。
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