AbstractThe team of Research‐Cottrell and Riley Stoker is conducting a proof‐of‐concept demonstration of an Integrated Dry Injection process for coal‐fired boiler SO2and NOxcontrol under a U.S. Department of Energy contract with co‐funding by the Electric Power Research Institute. The SO2and NOxremoval technologies, which are combined in this demonstration test, have been independently evaluated but have not yet been tested as an integrated system. The integrated tests are important to determine and characterize any interactions between the technologies, either positive or negative.Subscale tests were conducted to determine the best calcium and sodium sorbents to use in the proof‐of‐concept demonstration. The demonstration is being conducted on the large combustor at the Riley Stoker Research Facility. The parametric test program consists of a series of tests for the purpose of demonstrating SO2and NOxreductions and is designed to allow a determination of the influence of each parameter on SO2a