Nitrogen dioxide opening with

The lid is provided with a rectangular opening (1) (35 x20 cm) for feeding in the naphthalene. After the nitrator has been charged the opening is closed with a sheet iron lid. The nitrator lid is also equipped with pipe (2), connected with a ventilator by means of a stoneware pipe the ventilator itself is connected with an absorption tower for absorption of nitrogen dioxide in water. In addition the nitrator is equipped with stirrer (3) (85-90 r. p. m) and with two baffles (4) located opposite to each other to increase the stirring effect. 

The results of the test showed that the uranium dioxide produced a vigorous reaction with the nitrate melt, beginning at approximately 400°C. At this time the melt was open to the atmosphere, and no nitric acid was being added. Nitrogen dioxide was evolved as a gaseous product of the reaction, but there was no visual indication of any uranium solubility in the molten nitrate eutectic. Complete reaction, indicated by the cessation of gas evolution, required approximately 2.5 hours at 500°C. 

Fig. 3-7. Vertical distribution of nitrogen oxides and nitric acid in the stratosphere. Left Nitric oxide in the sunlit atmosphere the fields enclose data obtained with the chemiluminescence technique (Horvath and Mason, 1978 Roy et at, 1980 Ridley and Schiff, 1981 Ridley and Hastie, 1981) horizontal lines represent measurements by infrared optical techniques (Drummond and Jarnot, 1978 Roscoe etal., 1981 Loewenstein etal., 1978a,b). Center Nitrogen dioxide as observed by optical measurement techniques, day (d) and night (n) points indicate data from Murcray et al. (1974), Goldman et al. (1978), Blatherwick et at (1980) horizontal bars are from Drummond and Jarnot (1978) and Roscoe et al. (1981). The N205 profile was obtained by Toon et al. (1986) at sunrise. Right Nitric acid observed by in situ filter sampling (open points) (Lazrus and Gandrud, 1974) and by infrared spectroscopy and mass spectroscopy (solid points) (Fontanella et at, 1975 Harries et al., 1976 Evans et al., 1978 Arnold et al., 1980 Murcray et al. as quoted by Hudson, 1982 Fischer et at, 1985). The envelope gives the error range.

Produced when a high-tempera-ture heat source, such as an open flame, comes into contact with atmospheric nitrogen. Also a by-product from the burning of fossil fuels in places such as factories, power plants, and motor vehicles. In the home the major sources of nitrogen dioxide are gas cookers, gas or kerosene heaters, open fireplaces, and cigarette smoke... 

Nitrogen is usually preferred for the indifferent gas, but hydrogen, methane, the inert gases and, in acid solution, even carbon dioxide can also be used. With carbon dioxide, open vessels can be used for the polarographic electrolysis. 

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