Oxygen releasing

Pyrolysis. Heating in the absence of oxygen releases moisture at low temperatures, carbon dioxide at temperatures >200° C, and a variety of gaseous products at very high temperatures. Acid washing of the raw coal is used to remove extractable cations, followed by treatment with selected cations. Yields of CO2, CO, CH, H2, and H2O depend on the amounts of inorganic species in the coal (42). 

The oxygen release rate is directly proportional to the cross-sectional area of the candle for a specific composition and also depends on the linear bum rate. Lower fuel contents decrease the bum rate slightly, eg, ca 2 wt % iron is the lower limit for rehable room temperature operation. Low temperature starts require at least 3.5 wt % iron. Another factor is direction of flow of the evolved gas. If the hot oxygen flows over the unbumed portion of the candle, as much as 15% rate iacreases can be produced. The bum time is halved for each 3.4 MPa (500 psi) pressure rise. The highest pressure that can be produced is ca 138 MPa (20,000 psi). 

The oxygen released is recycled to the isobutane oxidation step. GTBA contains some methanol and acetone coproducts and is used as a blending agent for gasoline. 

Chemical sources Peroxides Oxygen release Unstable Decomposition ... 

The most important use of ammonia is in the production of nitric acid (HNO3). Ammonia burns in oxygen, releasing hydrogen to form water and free nitrogen. With the catalysts platinum and rhodium, ammonia is oxidized and reacted with water to form nitric acid. Nitric acid treated... 

Oxygen release Unstable Decomposition Exothermic reaction Catalyst... 

Fig. 6.18. Temperature dependence of 02 emission (f) and triplet oxygen release (2) during linear heating of VgOn sample in vacuum.

Tohgi H, Sasaki K, Chiba K and Nozaki Y (1990). Effect of vinpocetine on oxygen release of hemoglobin and erythrocyte organic polyphosphate concentrations in patients with vascular dementia of the Binswanger type. Arzneimittelforschung, 40, 640-643. 

We shall return to the point that the manganese centre is associated with bicarbonate, Ca2+ and Cl, which act as control ions for oxygen release. A second bicarbonate ion appears to be bound to the single ferrous atom in part of the... 

Adsorptions are exothermic, releasing more than the latent heat of the adsorbate gas, which quasi liquefies and solidifies besides being attracted. The first traces of adsorbed oxygen release even more heat than the combustion of carbon to carbon dioxide but after the first adsorption sites have been occupied, the adsorptive heat — based on unit mass of adsorbed oxygen — gradually drops to the level of condensation heat, far below the heat of combustion. 

Bromine trifluoride calorimetry has considerable development potential both with respect to improved accuracy and with respect to the range of materials which can be examined. Thus the more insoluble or refractory materials could be reacted in "acid or "basic solutions in BrF3 or even in molten acids or bases at higher temperatures. (The, 80/180 ratio in rocks can be measured on the oxygen released by dissolving minerals in such melts.)... 

Mysona, E. S. and Hughes, W. D., 1999, Remediation of BTEX in Groundwater with LNAPL Using Oxygen Releasing Materials (ORM) In In Situ Bioremediation of Petroleum Hydrocarbons and Other Organic Compounds (edited by B. C. Alleman and A. Leeson), Battelle Press, Columbus, OH, Vol. 5, No. 3, pp. 283-288. 

Anaerobic processes circumvent the need for die addition of poorly soluble oxygen or oxygen-releasing compounds ... 

Catalase 1.11.1.6 Hydrogen peroxide Oxygen Oxygen release... 

Figure 5.17 Superoxide generation during oxygen release from haemoglobin...

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