Maintaining acceptable burning intensity and stability under lean premixed combustion is a challenge in gas turbine operation. Enhancing flame stability under such conditions is accomplished by preheating the fuel or by regulating its composition. Preheating increases the flame speed and resistance to extinction, but also increases the NOx emissions. since the combustion temperatures are higher. Regulating the composition is typically accomplished through H-2 addition. which even at small amounts can noticeably increase combustion stability and reduce NOx emissions. H-2 is expensive to produce. and CH4 steam reforming with the use of waste heat has been proposed as a viable solution. Furthermore, it is far more economical to add the reformate mixture to the fuel, which in addition to H-2 also contains CO, CO2, unreacted steam, and CH4, rather than H-2. Prior studies by our group have focused on the dynamics and structure of names of lean mixtures of air with CH4/H-2/CO/CO2/H2O2 the five-gas fuel mix resulting when combining the reformer product with fresh CH4. In this article, the focus is on quantifying the NOx emissions characteristics, Experiments and simulations were carried out in a single jet-wall configuration. The experimental data compare favorably with the numerical predictions and indicate that adding the reformate mixture to CH4 results in lower NOx emissions under the same burning intensity.