Mass spectrometric detection of neutral radicals and ions by alkali element ion attachment and application to highly-preheated air combustion
The use of highly preheated and low oxygen concentration air as the oxidizer using regenerative combustion has become of increasing interest because this technology provides higher thermal efficiency, low energy consumption and reduced emission of pollutants such as NO{sub x} and CO{sub 2}. In this study, the authors provide information on the effect of preheating and diluting the air on combustion mechanism by direct detection of chemical ions and neutral radicals formed in flames using mass spectrometry. The intact ionic species were detected only at downstream position of the flames. By applying an alkali element (Li{sup +}) ion attachment technique, neutral radicals, such as Li{sup +}-attached ions, were also detected successfully. Drastic changes in the spectra of the intact ionic species and the Li{sup +}-adduct neutral radicals were found during combustion with the three cases of normal air, preheated air, and preheated air with low (diluted) oxygen concentration in air. All the changes indicated that the number of the chemical species formed in the flame were increased by preheating the air, and decreased by diluting the air.
- Research Organization:
- Nagoya Univ., (JP)
- OSTI ID:
- 20006903
- Resource Relation:
- Conference: 1999 International Joint Power Generation Conference, Burlingame, CA (US), 07/25/1999--07/28/1999; Other Information: PBD: 1999; Related Information: In: Proceedings of the 1999 international joint power generation conference (FACT-vol. 23). Volume 1: Fuels and combustion technologies; Gas turbines; and Nuclear engineering, by Penfield, S.R. Jr.; Moussa, N.A. [eds.], 651 pages.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Two-dimensional distribution of flame fluctuation during highly preheated air combustion
Investigating the effect of oxy-fuel combustion and light coal volatiles interaction: A mass spectrometric study