The Mercury (3P1) Photo-Sensitized Decomposition of Propane at High Temperatures

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Abstract
The mercury (3P1) photo‐sensitized decomposition of propane has been studied from room temperature to 450°C at pressures between 4 and 300 mm. The high temperature results are explained in terms of the decomposition of the propyl radical to form ethylene or propylene, and activation energies of 20 and 38 kilocalories, respectively, are assigned to these reactions. Experiments are also described where propane and propylene were in competition for hydrogen atoms, the relative rates of reaction being found at three temperatures. The difference in the activation energies of the two reactions is 4 kilocalories. The reactions at lower pressures are more complex and only a qualitative description of them can be given.

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