Experimental Investigation of NOx and CO Emissions from Fuel Rich-Lean Flame of Natural Gas
NOx and CO emissions of fuel rich-lean flame of natural gas water heaters were experimentally investigated. Fuel-rich and fuel-lean flame with different air factors were analyzed separately. Emission of fuel-rich flame is CO whereas emission of fuel-lean is NOx, and fuel rich-lean ratio is the most important factor for NOx and CO emission. If fuel-rich flame α1 is changed with constant fuel-lean flame α2, NOx emission decreases and CO emission increases evidently. If α2 is changed with constant α1, NOx decreases slightly and CO increases initially and then decreases. Depressing fuel-lean flame can strengthen excess O2 diffusion to fuel-rich flame, and then reduces NOx and CO emissions.
Weiguo Pan, Jianxing Ren and Yongguang Li
Y. Z. Cui et al., "Experimental Investigation of NOx and CO Emissions from Fuel Rich-Lean Flame of Natural Gas", Advanced Materials Research, Vols. 347-353, pp. 3821-3825, 2012