Abstract
Combustion properties of coal gasification gas with CO<SUB>2</SUB> dilution were investigated for a newly proposed IGCC power generation system with CO<SUB>2</SUB> capture. In this system, the gasification gas is burned under high CO<SUB>2</SUB> concentration atmosphere. In order to clarify the combustion properties of the gasification gas under such atmosphere, the laminar and turbulent burning velocities were investigated for outwardly propagating stoichiometric H<SUB>2</SUB>/O<SUB>2</SUB>/CO<SUB>2</SUB> flames at the mixture pressures of 0.10 to 0.50MPa, comparing them with those of H<SUB>2</SUB>/O<SUB>2</SUB>/N<SUB>2</SUB> flames. The unstretched laminar burning velocities of H<SUB>2</SUB>/O<SUB>2</SUB>/CO<SUB>2</SUB> flames were smaller than those of H<SUB>2</SUB>/O<SUB>2</SUB>/N<SUB>2</SUB> flames. The ratios of the turbulent burning velocity at the flame radius 30mm, u<SUB>tn(30mm)</SUB> to the unstretched laminar burning velocity were found to be larger than those of H<SUB>2</SUB>/O<SUB>2</SUB>/N<SUB>2</SUB> flames at the same turbulence intensity. Increase in the turbulence Karlovitz number and decrease in the Lewis number by the CO<SUB>2</SUB> dilution might cause the increase in the ratio of the turbulent burning velocity to unstretched laminar one of H<SUB>2</SUB>/O<SUB>2</SUB>/CO<SUB>2</SUB> flames.
Translated title of the contribution | Effects of CO2 Dilution on Laminar and Turbulent Combustion of Hydrogen Mixtures Simulating Coal Gasification Gas |
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Original language | Japanese |
Pages (from-to) | 45-50 |
Number of pages | 6 |
Journal | Nenryo Kyokai-Shi/Journal of the Fuel Society of Japan |
Volume | 90 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2011 |