Nitrogen decomposition

Beryllium Nitrate. BeryUium nitrate tetrahydrate [13516-48-0], Be(N02)2 4H2O, is prepared by crystallization from a solution of beryUium hydroxide or beryllium oxide carbonate in a slight excess of dilute nitric acid. After dissolution is complete, the solution is poured into plastic bags and cooled to room temperature. The crystallization is started by seeding. Crystallization from more concentrated acids yields crystals with less water of hydration. On heating above 100°C, beryllium nitrate decomposes with simultaneous loss of water and oxides of nitrogen. Decomposition is complete above 250°C. 

Figure 9.14 reports the data for titanium reacting with air and another 02-N2 mixture at 1 atm under stoichiometric conditions. The temperature-pressure variation for the pure 02-Ti system is also detailed on Fig. 9.13. Table 9.4 reports data similar to those in Table 9.3 for the aluminum system. Note that point 3 (Ti-air) has a combustion temperature of 3450 K and a partial pressure of the non-nitrogen decomposition gases of 0.10 atm. The Ti-02 system...

HAZARD RISK Combustible capable of creating dust explosions incompatible with strong oxidizers combustion will produce carbon dioxide, carbon monoxide and oxides of nitrogen decomposition emits toxic fumes of NOx affected by light NFPA code not available. 

Marcon and Poiteau (595) also have given the equation for plutonium vapor pressure over PuN(s) in the temperature range 1400 to 2000"C. Their data in the lower temperature range are a little higher than those by Kent and Leary [143). Besides these, data on nitrogen decomposition pressures have been reported by several authors (141, 399). 

Hypophosphates are extremely stable to alkali hydroxides. No decomposition occurs in 80% NaOH at 200°C after 1 h, but with fused caustic soda at 320°C there is rapid conversion to orthophosphate (5.244). If silver, mercury or copper hypophosphates are heated below 200°C in nitrogen, decomposition to metal, orthophosphate and a mixture of condensed phosphates occurs. Strong heating gives a mixture of metaphosphate and metal (5.245). 

Phenolic resins give a high char yield on combustion and TGA provides a measure of the expected yield. Typical values are between 40 and 65% in nitrogen. Decomposition begins at 350°C and continues up to 600°C. Autoignition temperature in air is above 900°C. Thermogravimetric analyses have played an important part in the development of carbon-carbon and carbon-graphite-fiber composites... 

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