The
complexity and challenges in noncontact temperature measurements
inside microwave-heated catalytic reactors are presented in this paper.
A custom-designed microwave cavity has been used to focus the microwave
field on the catalyst and enable monitoring of the temperature field
in 2D. A methodology to study the temperature distribution in the
catalytic bed by using a thermal camera in combination with a thermocouple
for a heterogeneous catalytic reaction (methane dry reforming) under
microwave heating has been demonstrated. The effects of various variables
that affect the accuracy of temperature recordings are discussed in
detail. The necessity of having at least one contact sensor, such
as a thermocouple, or some other microwave transparent sensor, is
recommended to keep track of the temperature changes occurring in
the catalytic bed during the reaction under microwave heating.
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