Abstract
Abstract The formation of H2, CH4 and CO2 by a chain mechanism has been ascertained in the gamma-radiolysis of powdered paraformaldehyde with lower doses and dose rates. Since almost no effect was observed on the product yields by adding an electron scavenger, while these were influenced significantly by adding C2H4, a radical chain mechanism is supposed to be the main path for this reaction. The successive decomposition of radicals produced by the dehydration of primary paraformaldehyde radicals was considered as the initiation step of this reaction by examining the effect of additives, such as water, and electron- and radical-scavengers, and the IR-spectra of irradiated samples. Practical use of this reaction on the treatment of the high level radioactive waste was suggested to develop the energy conversion system.
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