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CoMn‐Spinel Oxides as Supported Catalyst for Rocket‐Grade Hydrogen Peroxide Decomposition
Author(s) -
Ferroni Pereira Luís Gustavo,
Maschio Leandro José,
Péres de Araújo Emmanuel,
Henrique Gouvêa Leonardo,
Vieira Ricardo
Publication year - 2020
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.202000020
Subject(s) - monopropellant , spinel , decomposition , catalysis , hydrogen peroxide , manganese , specific impulse , cobalt , chemistry , rocket (weapon) , materials science , inorganic chemistry , propellant , combustion , metallurgy , organic chemistry , engineering , aerospace engineering
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 H 2 O 2 90 wt%. The 5.4 % Co 0.5 Mn 2.5 O 4 /Al 2 O 3 catalyst was tested in a series of continuous and pulsed 2 N thruster firings, yielding a fast and repetitive performance, spontaneously and completely decomposing H 2 O 2 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 % Co 0.5 Mn 2.5 O 4 /Al 2 O 3 catalyst. Its excellent activity in the decomposition of H 2 O 2 90 wt% was attributed to the presence of the redox pairs Mn 2+ /Mn 3+ and Co 2+ /Co 3+ , therefore making it a feasible material for low and medium thrust propulsive systems.