Radiation-induced chemical reactions of carbon monoxide and hydrogen mixture—II. Effects of reactant pressure and temperature on the yields of oxygen containing products

The radiation chemical reaction of CO-H₂ mixture up to 8.4 x 10⁵ Pa has been studied. The G values of oxygen containing organic compounds except methanol increased with increasing total pressure of reactant. The G values of most of products except trioxane and tetraoxane were increased with raising of temperature in the range from 210 to 350 K, while the G values of trioxane and tetraoxane reached the maxima at 243 K and decreased rapidly with raising of temperature. From the dependencies of G values of these cyclic ethers on pressure and temperature of the reactant, it is considered that these cyclic ethers produced from the neutralization reaction of HCO⁺ (CO)_n cluster ions with electrons in an atmosphere of relatively large amount of hydrogen. The effects of CO content on G values of products did not change with the pressure change of the reactant.