Electron-beam radiolysis of gaseous propane in the presence of water under circulation conditions

Electron-beam radiolysis of gaseous alkanes under circulation conditions: Gas-to-liquid transformation

“…Indeed, heavy alkanes are being efficiently destroyed, while protecting methane and ethane from conversion. Obviously, the irradiation time for larger components should be minimized, while that for methane and ethane should be increased, i.e., it is expedient to perform radiolysis with gas circulation, so that after a short-term irradiation stage, condensable products (nX6) are extracted from the reaction mixture as fully as possible, excess molecular hydrogen is removed, while fragmental light alkanes and alkenes are recycled to the reactor (Ponomarev et al, 2002;Ponomarev, 2006).…”

“…Due to high volatility, hexanes (boiling points from 49 to 69 1C) are carried by the flow of non-condensable gas and again participate in the radiolysis. In the irradiation area, hexane is converted mainly into the hexyl radical (Ponomarev et al, 2002). The subsequent recombination of the hexyl and propyl radicals gives (23) The main nonane isomers, 2,3,3,4-tetramethylpentane, 2,3,3-trimethylhexane, and 3-ethyl-2-methylhexane, are apparently formed via reaction (24) involving 2,3-dimethylbutane and 2-methylpentane radicals.…”

“…Earlier (Ponomarev et al, 2000(Ponomarev et al, , 2002, we had elaborated the circulating mode of an irradiation of gas at high dose rate. This mode consists in continuous removal of liquid radiolytic products from a recirculated gas, on the one hand, and in accumulation of light alkanes and alkenes inside a recirculated gas, on the other hand.…”

Application of Electron Beams for the Treatment of VOC Streams

“…Electron-beam technology is a promising method for treating VOCs at low concentrations. Many studies on the electron-beam treatment of VOCs have been performed at both the laboratory − and pilot − scales. However, few data are available for a feasibility study of this technology.…”

Electron-beam decomposition of phytogenous substances: Solid-to-liquid conversion

“…Promptly formed unsaturated compounds (in particular, by disproportionation of radicals) capture the d H and d OH radicals, depressing a yield of H 2 O and H 2 formation. Water can also participate in radiolytic processes, being the predecessor of alcohol and other oxychemicals (Ponomarev et al, 2002;Woods and Pikaev, 1994).…”