Ignition characteristics of co-fired mixtures of petroleum coke and bituminous coal in a pilot-scale furnace

► Addresses ignition characteristics encountered when co-firing petroleum coke with coal. ► Lean ignition limit is reached between 62% and 67% petroleum coke. ► Effect of burner aerodynamics is relatively small. ► Volatile matter was between 19.9% and 21.0% at the time of flame extinction.