Ignition of syngas/air and hydrogen/air mixtures at low temperatures and high pressures: Experimental data interpretation and kinetic modeling implications

• Published in: Combustion and flame Vol. 152; no. 1; pp. 293 - 299
• Main Authors: Dryer, Frederick L., Chaos, Marcos
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01.01.2008; Elsevier Science
• Subjects: 08 HYDROGEN; 10 SYNTHETIC FUELS; AIR; Applied sciences; COMBUSTION KINETICS; Energy; Energy. Thermal use of fuels; Exact sciences and technology; GAS FUELS; GAS TURBINES; HYDROGEN; IGNITION; MIXTURES; PRESSURE RANGE MEGA PA 01-10; TEMPERATURE RANGE 0400-1000 K; Theoretical studies. Data and constants. Metering; Hydrogen; Ignition; Low pressure; Combustion; Kinetics; High temperature; Synthesis gas; Modeling; Low temperature
• ISSN: 0010-2180; 1556-2921
• DOI: 10.1016/j.combustflame.2007.08.005

The magnitude of ignition delay observations and homogeneous kinetic calculations seen elsewhere is a result in large measure of departures of the experimental configurations from behavior dominated solely by homogeneous gas phase kinetics. In the regime of interest (higher pressures, lower temperatures), the hydrogen-oxygen chemical induction processes can be significantly perturbed by several nonhomogeneous effects, which include catalytic aberrations. The multiple perturbations that can significantly affect induction chemistry are very difficult to remove in research experiments and nearly impossible to control in engineering applications. The implications for developing lean premixing schemes for advanced syngas gas turbine applications are that designs must consider the inherent presence of these perturbations on ignition delay as well as those that might occur from potential particle contamination of the air stream exiting the compressor, if stimulated flashback into the mixing region is to be precluded.