Rate parameters for CH3+ H2→ CH4+ H in the temperature range 584–671 K

Abstract

A new method of data treatment is described which permits the measurement of the rate constant for the reaction CH₃+ H₂→ CH₄+ H (2) without any assumption of a value for the rate constant for methyl recombination. Experiments in which azomethane was pyrolysed in a large excess of hydrogen were carried out in the ranges 584–671 K and 5–26 Torr total pressure. The results can be expressed in the form log(k₂/cm³ mol^–1 s^–1)= 11.70 – 44 kJ mol^–1/(2.3 RT).

The conditions for which the theory of the method is valid are discussed.