[kən¦tin·yə·wəs ¦kän‚takt ′kōk·iŋ] (chemical engineering) A thermal conversion process using the mass-flow lift principle to give continuous coke circulation; oil-wetted particles of coke move downward into the reactor in which cracking, coking, and drying take place; pelleted coke, gas, gasoline, and gas oil are products of the process.