Kinetics and mechanism of thermoradiation decomposition of water vapour and its mixtures with acceptors

Water-vapour radiolysis under accelerated electrons in a one-pass flow system was investigated. The radiolysis parameters were changed over a wide range. Pure water vapour and its mixture with carbon monoxide were irradiated. The maximum radiation hydrogen yieldG_m = 8 in pure water vapour independent of dose rate was obtained at temperatures higher thanT_c. In mixtures of H₂O + CO at definite parameters the radical processes of water vapour decomposition transforms into a chain mechanism (the chain lengthv ≲ 200). The kinetics and the mechanisms of radical and chain processes of water vapour decomposition were considered.