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TECHNICAL PAPERS: Fuels and Combustion Technology

Mass Spectrometric Detection of Ionic and Neutral Species During Highly Preheated Air Combustion by Alkali Element Ion Attachment

[+] Author and Article Information
T. Ishiguro, K. Matsumoto

Department of Applied Chemistry, Graduate School of Engineering

A. Matsunami, K. Kitagawa

Research Center for Advanced Energy Conversion

N. Arai

Research Center for Advanced Energy Conversion, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

A. K. Gupta

Department of Mechanical Engineering, University of Maryland, College Park, MD 20742e-mail: akgupta@end.umd.edu

J. Eng. Gas Turbines Power 124(4), 749-756 (Sep 24, 2002) (8 pages) doi:10.1115/1.1473158 History: Received October 03, 2000; Revised January 28, 2002; Online September 24, 2002
Copyright © 2002 by ASME
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Figures

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Experimental setup for the detection of ionic species and neutral species in flames. A: Electric heater; B: mass spectrometer (Shimadzu QP1100EX); 1 sampling cone interface (orifice diameter 0.2 mm); 2 skimmer cone interface (orifice diameter 0.2 mm); 3 ion lends (15 mm i.d., 54 mm o.d., and 14 mm in thickness); 4 quadrupole mass analyzer; 5 channeltron detector; 6 vacuum pump (pressure in MS: 2.7×10−3 Pa); C: quartz burner head (4.0 mm i.d.); D lithium dry aerosol generator.
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The measurement locations used for investigating the spatial profiles in the flames. The value in the parentheses represents the relatively long flame obtained with highly preheated and diluted air under conditions of TN2+O2= 1000°C, O2 conc. in air=10%, and ϕ=2.0.
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Lithium dry aerosol generator
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The mass spectra detected at five different locations in the flame (from the upstream position PA to the downstream PE shown in Fig. 2). Conditions: TN2+O2=20°C, O2 conc. in air=21%, and ϕ=1.0 (flame I).
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The mass spectra detected at the downstream position PE (10 mm from the flame tip). Conditions of TN2+O2= 1000°C, O2 conc. in air=21%, and ϕ=1.0 (flame II).
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The mass spectra at the downstream position PE (10 mm from the flame tip). Conditions TN2+O2=1000°C, O2 conc. in air=10%, and ϕ=2 (flame III).
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The mass spectra detected with lithium ion attachment technique at position PE (10 mm from the flame tip). The flame conditions used were (a) TN2+O2=20°C, O2 conc. in air=21%, and ϕ=1.0 (flame I); (b) TN2+O2=1000°C, O2 conc. in air=21%, and ϕ=1.0 (flame II); (c) TN2+O2=1000°C, O2 conc. in air=10%, and ϕ=2.0 (flame III).
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The mass spectra obtained at position PB with lithium ion attachment technique. The flame conditions used were (a) TN2+O2=20°C, O2 conc. in air=21%, and ϕ=1.0 (flame I); (b) TN2+O2=1000°C, O2 conc. in air=21%, and ϕ=1.0 (flame II); (c) TN2+O2=1000°C, O2 conc. in air=10%, and ϕ=2.0 (flame III).
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The calculated mass spectra of neutral species at position PE with lithium attachment technique. The flame conditions were (a) TN2+O2=20°C, O2 conc. in air=21%, and ϕ=1.0 (flame I); (b) TN2+O2=1000°C, O2 conc. in air=21 %, and ϕ=1.0 (flame II); (c) TN2+O2=1000°C, O2 conc. in air=10%, and ϕ=2.0 (flame III).
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The spectra of the C2 swan band from the flames; (a) flame I, (b) flame II, (c) flame III
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Fluctuation of TIM at positions PB in the flame; (a) flame I, (b) flame II, (c) flame III

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