Abstract
The heating of fused silica by the absorption of laser infrared radiation is the basis for the design of a short-residence-time high-temperature reactor. When a CO 2 laser is focused on the exit orifice of a silica flow tube, a dilute mixture of a reactant gas in helium is exposed to the high orifice temperature for only about 20 μs. During such short time intervals, secondary reactions tend to be reduced. This heating method was applied to the multichannel decomposition of cyclobutanone. The formation of propylene was shown to arise directly from the cyclobutanone in a third decomposition channel and not from the secondary isomerization of cyclopropane.
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