Mixed Oxides of Nitrogen
The term Mixed Oxides of Nitrogen (mostly abbreviated to MON ) comes from English and means "mixed nitrogen oxides".
They are solutions of nitric oxide (NO) in dinitrogen tetroxide / nitrogen dioxide (N 2 O 4 / NO 2 ). They can be used as an oxidizer , for example in rocket engines . A variety of mixing ratios are in use, often referred to as MONi. Here i indicates the percentage of nitrogen monoxide in the mixture (for example MON1 contains 1% nitrogen monoxide and MON3 3% nitrogen monoxide). An upper limit is MON40 (40 percent by weight NO).
When used as a storable oxidizer for rocket engines, the nitrogen monoxide is always dissolved in the, at normal temperatures, liquid oxidizer nitrous oxide and the amount of dissolved nitrogen monoxide is comparatively small. In Europe, MON 1 or 3 is usually used for rocket propulsion, whereas in the USA MON 3 is mostly used.
The melting point of the mixture (MON) of nitrogen monoxide and dinitrogen tetroxide is significantly lower than that of the pure dinitrogen tetroxide of −11 ° C ( lowering of the freezing point ). An increase in the NO content also leads to a lower corrosiveness of the fuel, but the production costs rise sharply and the oxidizing power decreases.
hazards
Like its components nitrogen monoxide and nitrous oxide or nitrogen dioxide, MON is very toxic, oxidizing and, like nitrogen monoxide, also corrosive.
Individual evidence
- ↑ Regulation (EC) No. 117/2008 of the Commission of January 28, 2008 amending Regulation (EC) No. 329/2007 of the Council of March 27, 2007 on restrictive measures against the Democratic People's Republic of Korea . In: Official Journal of the European Union . L, No. 35, February 9, 2008, pp. 57-124.