The Radiation Synthesis of Hydrogen Cyanide from the Nitrogen–ethylene System. The Effect of Fission-fragment Irradiation

Abstract

Upon irradiation by (FF+n+γ), the G(HCN) value from the nitrogen-ethylene system increased with the rise in the pressure, while upon y and (n+γ) radiations it decreased. This pressure effect was explained in terms of the high concentration of the active species in the FF tracks. At a high pressure, Reaction (5) is considered to take place in the tracks; &N_2^++e^-→2N\ ag5 \intertextAt low pressures, Reaction (6) predominates, as in the γ-ray radiolysis, over Reaction (5) even in the FF tracks, &N_2^++C_2H_4→N_2+C_2H_4^+\ ag6 and nitrogen molecule cations do not contribute to the formation of hydrogen cyanide.

Radiation Chemical Reactions in Carbon Dioxide-Propane System

“…The GFF values thus estimated are shown in The high G(CO) value (6.7) and the low G(C 2 H 6 ) value (0.04) with FF irradiation under 1% propane addition suggest that reaction ( 3 ) prevails over reaction ( 2) in the FF radiolysis, whereas in that with r and (n+r).…”

“…However, in a nitrogen-ethylene system, FF has been observed to stimulate the formation of hydrogen cyanide at relatively low pressures (2).…”

Radiation Chemical Reactions in Carbon Dioxide-Propane System Formation of Carbon Monoxide by Fission Fragments

“…However, in a nitrogen-ethylene system, FF has been observed to stimulate the formation of hydrogen cyanide at relatively low pressures (2). The effect of FF irradiation has been observed mostly in condensed phase, or in gas phase at very high pressures where density In the present work, the radiolysis of CO. by FF and by mixed reactor radiations (n+r) or 6°C o r. was examined under the influence of propane as additive, and measurements were made of the yields of carbon monoxide (CO) and ethane which are the main decomposition products of C0 2 and propane, respectively.…”

“…(11') The first term in Eq. (11') represents the rate of diffusion out of the core, the second the rate of reaction ( 2) and the third that of reaction ( 3 ).…”

“…With rise in total pressure, reaction ( 3 ) comes to predominate over the others. This will naturally favor the formation of excess CO by the reaction ( 3 ) from C0 2 cations, which would otherwise be 507 dissipated by the reaction ( 2 ).…”