Reburning is a useful technology in reducing nitric
oxide through injection of a secondary hydrocarbon fuel. In this paper,
an experimental study has been conducted to evaluate the effect of fuel
lean reburning on NOx/CO reduction in LNG flame. Experiments
were performed in flames stabilized by a co-flow swirl burner, which
was mounted at the bottom of the furnace. Tests were conducted using
LNG gas as the reburn fuel as well as the main fuel. The effects of
reburn fuel fraction and injection manner of the reburn fuel were
studied when the fuel lean reburning system was applied. The paper
reports data on flue gas emissions and temperature distribution in the
furnace for a wide range of experimental conditions. At steady state,
temperature distribution and emission formation in the furnace have
been measured and compared. This paper makes clear that in order to
decrease both NOx and CO concentrations in the exhaust when the
pulsated fuel lean reburning system was adapted, it is important that
the control of some factors such as frequency and duty ratio. Also it
shows the fuel lean reburning is also effective method to reduce NOx
as much as reburning.
 J. Prataps, J. Bluestein, Natural Gas Reburn : Cost Effective NOx Control,
Power eng. Vol. 98, 1994, pp. 47-50.
 S. L. Chen, J. A. Cole, M. P. Heap, J. C. Kreamlich, J. M. McCarthy, D.
W. Pershing, Advanced NO Reduction Processes Using -NH and -CN
Compounds in Conjunction with Staged Air Addition, 22th Symposium
(International) on Combustion, Pittsburge, 1998, pp.1135-1145.
 J. Brouwer, M. Heap, W. Owens, D. W. Pershing, Advanced Low NOx
Concepts for High Efficiency Power Generation System, 10th Annual
ACERC Technology Conference, Salt Lake City, March, 1996.
 J. Brouwer, N. S. Harding, W. D. Owens, The Use of Wood as a
Reburning Fuel in Combustion Systems, Proc. 6th National Bioenergy
Conference, 1994, pp.123-130.
 C. Casaca, M. Costa, NOx Control through Reburning Using Biomass in a
Laboratory Furnace: Effect of Particle Size, Proc. Combust. Inst. 32 ,
 H. S. Hura, B. P. Breen., Nitrogen Oxide Reduction by Gaseous Fuel
Injection in Low Temperature, Overall Fuel-Lean Flue Gas, U. S. Patent
 A. K. Gupta, D. G. Lilley and N. Syred, 1984, Swirl Flows, ABACUS