Thermal radiation controlled ignition/extinction phenomena in a system of separated catalyst layers with exothermal chemical reaction
✍ Scribed by D. Vortmeyer; R. Stahl
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 630 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
Ah&act-In
analogy to tixed beds ignition/extinction phenomena were observed in an exotbermic and adiabatic chemical tubular reactor containing ten separated layers of catalyst particles. Obviously the thermal feed back by radiative exchange caused the system to perform like a quasihomogeneous medium. The application of the two phase homogeneous model equations revealed that the predicted ignition temperatures, which agreed welt with those measured in a packed bed, were on the average IO K lower than those measured in the multilayer system. This result is attributed to the missing eontact points which in packed beds are privileged areas for the progress of ignition.