Annual scientific rept. 1 Jul 1970-30 Jun 1971
NOTTINGHAM UNIV (UNITED KINGDOM) DEPT OF INORGANIC CHEMISTRY
Pagination or Media Count:
The compound FeNO33.N2O4 NOFeNO34- was previously identified as the principal constituent of deposits responsible for flow-decay of liquid propellant N2O4 in steel systems. In the light of this, an extensive investigation of N2O4 adducts of FeNO33 has been carried out including synthesis, analysis, vibrational spectroscopy and X-ray studies. The work indicates that the constituent species of the solid adducts FeNO33xN2O4 where x is typically 1.0-1.5 are NO, NO solvated by NO2 or N2O4, FeNO34-, and N2O4. The behaviour of these adducts has also been studied in HNO3 solution and in HNO3N2O4 mixtures. The properties of the FeNO33xN2O4 HNO3N2O4 system are interpreted in terms of a gross modification of the HNO3 N2O4 phase diagram by FeNO33xN2O4. A flow apparatus has been constructed so that flow-decay deposit may be collected and its chemical identity and physical form studied as a function of the water HNO3 content of N2O4 monitored by H n.m.r.. A number of projected investigations is also discussed.
- Inorganic Chemistry
- Liquid Rocket Propellants