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A new apparatus for study of pressure-dependent laminar premixed flames with vacuum ultraviolet photoionization mass spectrometry
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10.1063/1.4773541
/content/aip/journal/rsi/84/1/10.1063/1.4773541
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/1/10.1063/1.4773541

Figures

Image of FIG. 1.
FIG. 1.

(a) A photograph of the combustion apparatus. (b) The vertical cut view of the apparatus showing the arrangement of the main components.

Image of FIG. 2.
FIG. 2.

Photographs of the sampling orifices at the tip of quartz nozzles used for different pressures.

Image of FIG. 3.
FIG. 3.

Timing diagram of the operation of the ion trap.

Image of FIG. 4.
FIG. 4.

Zoomed view of the time-of-flight mass spectrum of Ar showing the peak shape and peak width. The dashed line is Gaussian fitting of the histogram.

Image of FIG. 5.
FIG. 5.

Response curve for Ar concentration. The peak area is normalized by photon intensity (○, nitrogen-diluted air; ●, nitrogen-diluted Ar; —, linear fitting). The inset view shows mass spectrum of Ar in 1000 times nitrogen-diluted air.

Image of FIG. 6.
FIG. 6.

Mass spectrum of Xe obtained at the photon energy of 16.5 eV.

Image of FIG. 7.
FIG. 7.

Photoionization mass spectra of the premixed C2H4/O2/Ar flames at the photon energy of 11.27 eV. The pressures of flames are (a) 30 Torr, (b) 150 Torr, and (c) 760 Torr, and the distances of the sampling nozzles above the burner surface are (a) 5.0 mm, (b) 2.0 mm, and (c) 1.5 mm, respectively.

Image of FIG. 8.
FIG. 8.

Photonionization efficiency spectra of C3H4 and C2H4O from ethylene flame with pressure of 30 Torr. Measured ionization energies were labeled above the corresponding thresholds.

Image of FIG. 9.
FIG. 9.

Aromatics observed in the premixed C2H4/O2/Ar flames at the photon energy of 11.27 eV. The pressures of flames are (a) 30 Torr, (b) 150 Torr, and (c) 760 Torr, and the heights of sampling nozzles above the burner surface are (a) 5.0 mm, (b) 2.0 mm, and (c) 1.5 mm, respectively.

Image of FIG. 10.
FIG. 10.

Experimental mole fraction profiles of selected flame species (C2H4, O2, CH3, H2CO, C4H6, CH3OH) at pressures of 30 Torr (squares), 150 Torr (circles), and 760 Torr (triangles).

Tables

Generic image for table
Table I.

Vacuum system of the apparatus.

Generic image for table
Table II.

Experimental conditions for the fuel-rich C2H4/O2/Ar flames.

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/content/aip/journal/rsi/84/1/10.1063/1.4773541
2013-01-08
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A new apparatus for study of pressure-dependent laminar premixed flames with vacuum ultraviolet photoionization mass spectrometry
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/1/10.1063/1.4773541
10.1063/1.4773541
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