Oxidation of hydrogen by nitrogen dioxide

The direct oxidation of hydrogen by nitrogen dioxide has been studied by Ashmore and Levitt [261], and Rosser and Wise [262]. The reaction proceeds rapidly at 600—700 K without change of pressure, according to the overall stoichiometry 

The rate is much greater than the rate of decomposition of NO 2 to NO and oxygen. The reaction is inhibited by nitric oxide, and the extent of 

The results may be explained by means of the free radical straight chain mechanism 

The sensitization by NOCl may be explained by the addition to the above mechanism of reactions (xxxv) and (xxxvi) 

The overall reaction also shows an ignition boundary in the temperature range 790—840 K. The ignitions are thermal in nature, and the rate law is quantitatively similar to that found in the slow reaction [261]. 

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