After many years of experimental testing and development work, coal-fired pressurized fluidized bed (PFB) combustion combined-cycle power plants are moving toward reality. Under the US Department of Energy's Clean Coal Technology Program, a 70-MWe PFB combustion retrofit, utilizing a 1525/degree/F gas turbine inlet temperature, is to be built as a demonstration plant at the American Electric Power Company's Tidd Plant in Brilliant, Ohio. The targeted goals are a 45-percent efficiency and a cost of electricity (COE) that is at least 20 percent lower than the COE of a conventional pulverized-coal (PC)-fired plant with stack gas scrubbing. In addition, plant emissions should be within New Source Performance Standards (NSPS) and the plant should have high availability, be able to burn different ranks of coal, and incorporate modular construction technologies. The program is structured into three phases. During Phase 1, the system was defined and optimized. The major thrust of Phase 2 is to design, construct, test, and evaluate the performance of the key components of the proposed plant, (i.e., carbonizer, CPFBC, ceramic cross-flow filter, and multiannular swirl burner (MASB) topping combustor), all as separate components. In Phase 3 these key components will be designed, constructed, and tested at a 5-MWe (equivalent) scale as a fully integrated subsystem. This effort will allow component performance data to be collected on a larger scale and, most important, integrated subsystem performance data obtained and proposed plant operating modes/philosophies investigated. In Phases 2 and 3, the commercial/baseline plant design and R and D program plan prepared in Phase 1 will be updated to reflect the results of Phases 2 and 3 testing. This report discusses Phase 2. 20 figs., 6 tabs.