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APPARATUS FOR SHORT TIME MEASUREMENTS IN A FIXED-BED, GAS/SOLID REACTOR
Citation:
Gullett*, B K., K. Bruce, AND R. Machilek. APPARATUS FOR SHORT TIME MEASUREMENTS IN A FIXED-BED, GAS/SOLID REACTOR. REVIEW OF SCIENTIFIC INSTRUMENTS. American Institute of Physics, NEW YORK, NY, 61(2):904-906, (1990).
Description:
An apparatus for exposure of a solid to reactive process gas is described which makes possible short time (≥ 0.3 to 15 s) exposures in a fixed-bed reactor. Operating conditions for differential reaction with respect to the gas concentration and rapid quench for arresting high-temperature reactions are made possible by high gas flowrates through the sample bed. The residence time of solid exposure to the reactive gases is timed by a photosensor emitter/detector and oscilloscope. For times under 2 s, the standard deviation of the residence times is less than 10 ms. The ease of apparatus construction and operation, the operable temperature range (ambient to 850 °C), and the reproducibility of residence times down to 0.3 s makes the apparatus ideal for kinetic studies of rapid gas/solid reactions. Review of Scientific Instruments is copyrighted by The American Institute of Physics.