Abstract
Combustion properties of coal gasification gas with CO_2 dilution were investigated for a newly proposed IGCC power generation system with CO_2 capture. In this system, the gasification gas is burned under high CO_2 concentration atmosphere. The laminar and turbulent burning velocities were measured for outwardly propagating stoichiometric H_2/O_2/CO_2 flames under the condition of constant flame temperature of 1300, 1500, 1700 and 2135℃ with initial mixture pressure, P_i of 0.10 and 0.25MPa. Increase in the turbulence Karlovitz number and decrease in the Markstein number by the CO_2 dilution might cause the increase in the ratios of the turbulent burning velocities at the flame radius 30mm, u_<tn(30mm)> to the unstretched laminar burning velocities, u_l of H_2/O_2/CO_2 flames.
Published Version
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