Dehydrogenation of 2-propanol was in a microreactor operated under forced periodic temperature cycling, and the reactivity was compared with that under steady-state operation. The microreactor for the forced periodic temperature cycling operation was made of an anodized aluminum substrate that was used as the catalyst plate. The reactivity test was conducted at the average temperature of 150 degrees C with temperature cycle times of 0.5, 1, 3, 5 and 10 min. It was found that the reactivity under non-steady state operation was higher than that under steady state operation. The power supplied during reaction under non-steady-state operation was lower than that under steady-state operation for the same 2-propanol conversion. From the viewpoint of cycle time, higher reactivity and lower supplied power were obtained with longer cycle times.