The symposium was the sixth in a biennial series devoted to the international exchange of information on recent technological and regulatory developments for stationary combustion NOx control. Topics covered included the significant increase in active full-scale retrofit demonstrations of low-NOx combustion systems in the United States and abroad over the past two years; full-scale operating experience in Europe with selective catalytic reduction (SCR); pilot- and bench-scale SCR investigations in the United States; increased attention on selective noncatalytic reduction in the United States; and NOx controls for oil- and gas-fired boilers. Papers from the following sessions are contained in Volume 3: Post Combustion Developments II; Combustion NOx Developments II; New Developments I; New Developments II; Oil/Gas Combustion Applications.

Key words: pollution; nitrogen oxides; combustion; catalysis; fossil fuels; pollution control; stationary sources; catalytic reduction; noncatalytic reduction. Includes bibliographical references. Prepared for the U.S. Environmental Protection Agency, Office of Research and Development; and the Electric Power Research Institute; by William Nesbit and Associates. Microfiche.

Performance of urea NOx reduction systems on utility boilers -- Widening the urea temperature window -- Catalytic fabric filtration for simultaneous NOx and particulate control -- Heterogeneous decomposition of nitrous oxide in the operating temperature range of circulating fluidized bed combustors -- NOx control in a slagging combustor for a direct-fired utility gas turbine -- Low NOx coal burner development and application -- Preliminary test results : high energy urea injection deNOx on a 215 MW utility boiler -- Evaluation of the ADA continuous ammonia slip monitor -- Ontario Hydro's SONOX process for controlling acid gas emissions -- Pilot plant test for the NOXSO flue gas treatment system -- The practical application of tunable diode laser infrared spectroscopy to the monitoring of nitrous oxide and other combustion process stream gases -- In-furnace low NOx solutions for wall fired boilers -- NOx reduction on natural gas-fired boilers using fuel injection recirculation (FIR) : laboratory demonstration -- Advanced reburning for NOx control in coal fired boilers -- Large scale trials and development of fuel staging in a 160 MW coal fired boiler -- Computer modeling of Nb2sO production by combustion systems -- Low NOx levels achieved by improved combustion modification on two 480 MW gas-fired boilers -- NOx reduction and operational performance of two full-scale utility gas/oil burner retrofit installations -- Comparative assessment of NOx reduction techniques for gas- and oil-fired utility boilers -- Analysis of minimum cost control approach to achieve varying levels of NOx emission reduction from the Consolidated Edison Co. of NY Power Generation Systems -- Reduced NOx particulate and opacity on the Kahe Unit 6 low-NOx burner system -- Demonstration of advanced low-NOx combustion techniques at the gas/oil-fired Flevo Power Station Unit 1.