“…[Or [N] g mole 1 cm 3 sec. compared to the prompt NO expression of De Soete (De Soete, 1975 equivalence ratios to avoid reaction at stoichiometric interfaces which generate large quantities of NO (Shouse et at, 1996) , and to minimize the post-flame residence time (commensurate with accomplishing CO burn-up) (Sturgess et at, 1996) . Most low-NOx designs involve staging of some form, and the bulk equivalence ratios may be either fuel-lean (with a pilot for stability), or, rich-then-lean.…”