As described previously in ASME papers, an effort has been underway to apply the emission reduction advantages of catalytic oxidation to practical burners for the large combustion turbines used in electrical power generation. A two-stage design is used to cover the operating range. Results are presented for high pressure combustion rig tests in the primary, secondary, and combined modes, as well as during transition. The fuel for this series, was No. 2 distillate oil. The work was supported by the Electric Power Research Institute, the Westinghouse Electric Corp., and the Engelhard Corp. The results define more clearly the highest priority areas for further development with this technology.