Heat transfer analysis is used to determine the potential for selective heating of metallic catalyst particles attached to a support through the use of microwaves. Important parameters are identified and estimated. Using these estimates, it is concluded that selective heating is possible with microwave fields of high frequency heating catalyst beds cooled by gases at low pressures. Selective heating is found to have a strong dependence on catalyst particle size, with optimum sizes in the 40-80 nm range. There is also strong dependence on microwave frequency. Areas of greatest uncertainty are discussed.