Reaction H+C2H4: Comparison of Three Experimental Techniques

Abstract

The reaction H+C2H4 has been studied as a function of He pressure at room temperature with three independent experimental techniques, and rate constants have been obtained in both the excess ethylene and excess hydrogen-atom environments. The products of the reaction are CH3, CH4, and C2H6. An experimental value for the third-body recombination coefficient for H+CH3+M has been obtained. The over-all stoichiometry of the reaction has been experimentally determined and is found to vary as a function of the initial reactant concentrations. A reaction mechanism is proposed which accounts for all of the experimental data obtained.