Calibration measurements in a catalysis reaction chamber using thermographic phosphors
Sammanfattning: Accurate temperature measurements using thermocouples inside a catalysis reaction chamber is problematic due to the difficulties to attach the thermocouple to the catalysis sample. It is also of interest to accurately know the pressure inside the reaction chamber. In this work, thermographic phosphors have been utilized in order to determine the temperatures occurring inside a catalysis reaction chamber for typical catalysis measurement environments, and a pressure calibration has been performed. The phosphor was coated on top of the sample holder inside the reaction chamber and on phantom samples imitating real catalytic samples. The results show that the measured temperatures are higher at all locations on the sample holder compared to the temperature readings of the thermocouple, and that the heat transfer to the phantom samples can be said to be fairly efficient. The results also shows that the pressure inside the chamber changes quadratically with a change in flow through the chamber.
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