Abstract
Flowing ethane, typically at 80 Torr, 1000°C, and 10 ms contact time, through a supersonic nozzle made of nickel or molybdenum converts roughly 40% to higher hydrocarbons. In the mass spectra of the products, C n H m , the most prominent peaks contain even numbers of carbon atoms ( n = 4, …, 12), but there are also substantial peaks with odd carbon atom numbers ( n = 3, …, 11). The largest peaks have m ≈ n hydrogen atoms, but many others also appear. For n = 6 the mass spectrum indicates benzene is probably the sole product, with yield up to 15%. Under the same conditions methane does not form higher hydrocarbons.
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