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To control a fuel processor, a simple yet accurate kinetic model is necessary. For this purpose, a new experimental optically accessible channel reactor was built to investigate the kinetics of autothermal gasoline reforming in monoliths. The reactor allows surface temperature measurements (infrared thermography) of the catalyst, through a quartz window without affecting the flow in the reactor. First experiments were performed, where a Fecralloy plate was placed in the reactor. The plate was coated with a proprietary reforming catalyst containing 1 wt.% of Rh. Preliminary experiments to test the concept of infrared surface temperature measurements were performed with an infrared pyrometer. The temperature on the surface of the catalytic plate was measured during methane reforming. The active regions exhibited temperature differences of up to 50 K compared to a blank experiment with nitrogen. At locations further downstream, where oxygen is completely consumed, a temperature decrease is observed. Fluid dynamic modeling of the channel reactor was performed to check the velocity field in the channel for different operating conditions. Buoyancy forces were insignificant at the conditions studied, the parabolic inlet flow profile was maintained along the reactor channel.