ADDITIVES FOR NOX EMMISSIONS CONTROL FROM FIXED SOURCES

SEVERAL EXHAUST GAS NOX ABATEMENMT PROCESSES EXIST BASED ON HETEROGENEOUS REACTION OF A REDUCED NITROGEN CONTAINING ADDITIVE SUCH AS NH3. THESE EXISTING PROCESSES ARE NOT ADEQUATETO MEET PROPOSED NOX EMISSIONS REGULATIONS FOR MOST RETROFITPOWER PLANT STACKS AND INCINERATORS. THE INVESTIGATORS PRO-POSE TO TEST COMBINATIONS OF ADDITIVES AND CATALYSTS THAT HAVE THE POTENTIAL TO LEAD TO A NEW PROCESS OF THE SELECTIVECATALYTIC REDUCTION (SCR) TYPE THAT CAN FILL THIS NEED. IN COMMERCIALLY AVAILABLE SCR PROCESSES ALMOST HALF OF THE REV-ENUE REQUIRED IS FOR THE COST OF THE CATALYST REPLACEMENT. BY USING A MORE REACTIVE ADDITIVE, A SIMPLER AND, THEREFORELONGER LIVED, LESS EXPENSIVE CATALYST MAY BE USED TO PROVIDEA PREFERRED PROCESS. THE INVESTIGATORS PROPOSED PHASE I PROJECT CONSISTS OF FIXEDBED ADDITIVE/CATALYST SCREENING TESTS AND SUBSEQUENT EN- TRAINED FLOW TESTS OF PROMISING CANDIDATE COMBINATIONS. THEDATA ACQUIRED FROM THESE TESTS WILL ESTABLISH THE FEASIBILI-TY. OF OUR APPROACH AND PROVIDE NECESSARY DATA FOR THE DESIGN OF A BENCH SCALE PROTOTYPE IN A PHASE II PROGRAM. SUCCESS OF THIS PROPOSED RESEARCH PROGRAM WOULD LEAD TO DEVELOPMENT OF A MORE ECONOMICAL, MORE COMPACT NOX EMISSIONSCONTROL PROCESS FOR APPLICATION TO POST COMBUSITON, EXHAUST GAS STREAMS. THE PROPOSED PROJECT WOULD EMPHASIZE DEVELOP- MENT OF SUCH A PROCESS FOR APPLICATION IN DUCTS OF COAL- FIRED POWER PLANTS AND INCINERATOR EXHAUST GASES.