Evidence of the non-thermal origin of second limit of self-ignition in reaction between fluorine and hydrogen

✍ Scribed by G.A. Kapralova; A.M. Chaikin

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 590 KB
• Volume: 13
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(69)90101-1

✦ Synopsis

LETTERS TO THE EDITORS 557 involving NH3 are rapid enough to allow a redox cycle of the catalyst. In related experimene~ 6 on the reaction with oxygen of a representative organic binder molecrle, such as propylene, the copper chromite catalyst was found to be most etfective in complete oxidation of propylene to CO2 and H20 (at 625°K) without any loss in activity over long periods of time. Most likely the copper chromite catalyst, a spinel structure of CuO'CrzO3, plays a dual role in propellant kinetics: (a) an oxidation catalyst for ammonia and organic binder molecules, and (b) a decomposition catalyst for perchloric acid. While the oxidation process appears to be unaffected by changes in the ehromlura cation valence state (perhaps copper cation is the important partner), the decomposition reaction of perchloric acid seems to be sensitive to the valence state of chromium.