Postflame behavior of nitrogenous species in the presence of fuel sulfur I. Rich, moist, CO/Ar/O2 flames

✍ Scribed by J.O.L. Wendt; E.C. Wootan; T.L. Corley

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 797 KB
• Volume: 49
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(83)90169-4

✦ Synopsis

Experimental measurements of NO, N 2, and other nitrogenous species in the postflame gases of rich (0 = 2.17) premixed laminar CO/Ar/O 2 (trace H 2) flames, with fuel nitrogen as NO, C2N 2, and NH3and fuel sulfur as SO2, allowed the nitrogen balance to be closed to within 7%. In the absence of hydmcarhons, and with only a trace of hydrogen, NO decayed homogeneously to form N 2 at high temperatures, and the fate of fuel nitrogen was independent of the type of fuel nitrogen species. The effect of fuel sulfur was to decrease postflame NO levels and increase N 2 more rapidly. The observed decay in NO and formation ofN 2 were consistent with detailed kinetic calculations employing only the reverse Zeldovich mechanisms to form N and N 2. There was no evidence of nther N 2 formation mechanisms being important for these hydrogen-poor flames, at either high or low temperatures. Calculations also showed that the most plausible effect of SO 2 in the mixture was to increase the steady-state N-atom concentration through direct interactions between, N, NO, S, and SO. N + NO --, N 2 + 0 [reverse Zeldovich] (I)