Two general modes of reactor operation are described in this study. In one situation only electrical heating occurs. This mode of operation is considered to be “adiabatic” since no air cooling of the process occurs in the interleaved cooling channels. In another situation counter-current air is introduced in the cooling channels. Process gas and air cooling are introduced into the reactor on opposite sides. The reactor is hotter on the front-end due to the large exothermic reaction occurring and cooler at the exit due to the air cooling effect. This counter-current mode provides a “temperature differential”.