Cottrell Environmental Sciences designed and furnished a horizontal flow, plate type electrostatic precipitator for testing at the government furnished Pressurized Fluidized Bed Combustor (PFBC) located at New York University's (NYU) facility in Westbury, Long Island. The overall purpose was to gather applications data on a sub-pilot scale to evaluate factors such as capital and operating costs. A test program was developed with this purpose and the major parameters to be evaluated where (a) collecting surface area of precipitator, (b) precipitator operating power, and (c) the gas velocity through the precipitator. 9 refs., 28 figs., 3 tabs.