Competition Kinetics of the Nonbranched-Chain Addition of Free Radicals to Olefins, Formaldehyde, and Oxygen
Figure 4
(1, 2) Quantum yields of (1) hydrogen peroxide and (2) water resulting from the photochemical oxidation of hydrogen in the hydrogen-oxygen system as a function of the initial oxygen concentration x (light wavelength of 171.9–172.5 nm, total pressure of 105 Pa, room temperature [57]). (3, 4) Hydrogen peroxide formation rate V(H2O2) (dashed curves) as a function of the rate V(H2O2) at which molecular oxygen is passed through a gas-discharge tube filled with (3) atomic and (4) molecular hydrogen. Atomic hydrogen was obtained from molecular hydrogen in the gas-discharge tube before the measurements (total pressure of 25–77 Pa, temperature of 77 K [46]). The symbols represent experimental data.
