This document summarizes a CFD analysis of a new spiral microreactor design for catalytic propane combustion. The analysis showed that the spiral design improved heat recirculation and stability over straight channel designs. Higher inlet velocities, thermal conductivity, number of turns, and equivalence ratios led to higher combustion temperatures and conversion. The spiral microreactor showed better performance than planar helical and U-bend microreactor designs in terms of operating range and maximum temperature.