in this study, the effect of hydrogen on methane combustion characteristic was tested. The ignition temperature (T-10) and burn off temperature (T-90) was carried out in a quartz reactor at atmospheric pressure with the mixture flow rate of 800 mL/min. The compositions of outlet gas were measured online by Gasmet DX4000 FTIR gas analyzer. The results showed that hydrogen enhanced the activity of methane. For all methane concentration range, the T-10 of methane could decrease 50 degrees C-70 degrees C with the H-2/CH4 mole ratio at 0.1. For 1 vol.% methane combustion, when the H2/CH4 was equal to 0.05, the T-10 and T-90 could decrease 45 degrees C and 42 degrees C, respectively. When the H-2/CH4 was 2.5, the T-10 and T-90 could decrease about 170 degrees C and 180 degrees C respectively. Further more, CO generated in a wider temperature range when the hydrogen was added. (C) 2008 Elsevier B.V. All rights reserved.