The paper describes the results of the combustion of carbon black slurries. (NOTE: The Hydrocarb process is being evaluated as a method of producing methanol hydrogen-rich fuel gas, and carbon black.) Since carbon black has significant heating value (33.78 million J/kg, 14,100 Btu/lb) and contains neither sulfur, nitrogen, nor inorganic ash, there is potential for its use as a clean burning fuel or fuel extender in boilers and industrial furnaces. To obtain a preliminary assessment of the potential, experiments were performed to examine the pumpability, atomization, and combustion characteristics of slurries made of mixtures of carbon black with No. 2 fuel oil and methanol.