
314 Oxygen-Enhanced Combustion
Li et al. experimentally studied a swirl-stabilized
burner with varying oxygen concentrations in the oxi-
dizer and methane as the fuel.
48
Two different types of
oxidizers were tested: O
2
+ CO
2
and O
2
+ N
2
. The former
simulates an oxidizer created by recycling ue gases in
a process using pure oxygen where the water has been
removed prior to recycle. This could be used to con-
centrate CO
2
emissions for easier removal. The latter
oxidizer simulates a more traditional air/fuel combus-
tion system that has been enhanced with oxygen. NO
measured with the O
2
+ CO
2
oxidizer was negligible,
but rose rapidly with oxygen concen ...