Shock Tube Study of the Ignition of Lean CO/H₂ Fuel Blends at Intermediate Temperatures and High Pressure

Abstract

The study of the combustion characteristics of H₂/CO fuel blends is of fundamental and technical interest because the H₂/CO system is very important in the hierarchical structure of oxidation models of hydrocarbon fuels and in advanced combustion technologies such as Integrated Gasification Combined Cycle (IGCC) which are currently developed allowing a reduction of the emissions of the power generation using biogenic sources and coal as fuel. Therefore, ignition delay times of 6 different H₂/CO/O₂/Ar-mixtures (fuel: 5% H₂/95% CO and 50% H₂/50% CO, Φ = 0.5) were measured at pressures of about 16 bar and temperatures between 1020 and 1260 K. The data were compared to predictions of different literature mechanisms.

Keywords:

• High pressure
• Ignition delay
• Shock tube
• Syngas

The authors thank Dr. F. van Dijen from Laborelec CVBA for financial support (contract no. 4500007215).