The Gas Technology Institute—in collaboration with Superior Graphite Company and SCHMIDTSCHE SCHACK, a division of ARVOS Group, Wexford business unit (formerly Alstom Power Energy Recovery)—developed an energy-efficient process of petroleum coke calcination in a fluidized bed with an advanced CHP system using the off-gases and the waste heat from the calcined coke. The recycled heat from the newly developed coke calcination process enables the CHP system to produce process stream and generate most of the electricity used by the fluidized bed.