If your dehydrating etoh with seives, you will need to dry them to an acceptible level before heating them. Forced air ovens work well, just make sure your aren’t creating a fuel air mixture in your lab! 175-260c is an acceptible range to regenrate your seives. Make sure to let them cool under vaccum. If you want to test the seives you can add a small amount of water to the dehydrated beads, they will display an exothermic reaction and create heat.