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Abstract

This final report presents the results of experimental studies which were undertaken with the objective to improve the understanding of the fate of the fuel-nitrogen in both fluidized bed and pulverized coal combustion systems. The results obtained within the scope of this project confirmed that the main source of NO(x) in both combustion systems is fuel-N, although thermal-NO could contribute up to 25% of the total NO(x) formed in pulverized coal systems if no measures are taken. N(2)O is a particular problem associated with fluidized beds resulting from relatively lower combustion temperatures used for the reason of controlling SO(2) emissions. Results confirmed the previous observations that the temperature was the principal parameter that influenced the level of N(2)O formed. Most of N(2)O formed appeared to be through the combustion of volatiles, whilst NO formation was mainly through the combustion of char. Most N(2)O reduction results in the formation of N(2) through heterogeneous reaction with char, however, some very small amount is also converted to NO. The reduction of NO by char could produce significant amounts of N(2)O at temperatures below 850 C.

Additional information

Authors: GULYURTLU I, INETI, Lisboa (PT);ESPARTEIRO H M, INETI, Lisboa (PT);CABRITA I, INETI, Lisboa (PT)
Bibliographic Reference: EUR 15737 EN (1997) 39pp., FS, ECU 7.00
Availability: Available from the (2)
ISBN: ISBN 92-827-9222-6
Record Number: 199710151 / Last updated on: 1997-04-01
Category: PUBLICATION
Original language: en
Available languages: en