2007 Fiscal Year Final Research Report Summary
Development of real-time multi-species laser concentration measurement by standard addition method
| Project/Area Number |
17206018
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
YOSHIKAWA Norihiko Nagoya University, Graduate School of Engineering, Professor (60135423)
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| Co-Investigator(Kenkyū-buntansha) |
HAYASHI Shigeru Japan Aerospace Exploration Agency, Aviation Program Group, Clean Engine Them Leader (10358492)
HASEGAWA Tatsuya Nagoya University, Eco Topia Science Institute, Professor (40164818)
SAITO Hiroyasu Nagoya University, Graduate School of Engineering, Assistant, Professor (80362284)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Thermal Engineering / Monitoring / Measurement / Pollution protection and control |
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| Research Abstract |
New quantitative laser measurement techniques for combustion exhausts were developed using a standard addition method.
1.Laser-Induced Fluorescence(LIF)measurement of nitrogen monoxide(NO)in flames was achieved using a standard addition method. Absorption lines of P_<11>(23.5), P_<21>+Q_<11>(14.5), and Q_<22>+R_<12>(20.5)in A^2Σ^+←X^2 II(0,0) band at 226.03nm were used and the fluorescence intensity of A^2Σ^+←X^2II(0,2)band in 246-248nm were measured. Temperature was determined by two-line method using P_<11>(36.5)line at 225.18 nm and R_<22>(20.5)line at 225.59 nm. Methane-air premixed flames and methane and propane diffusion flames in small burners were examined. The results showed that the new LIF technique provides reliable data. The sampling probe method was not applicable for high temperature combustion gases. The measurement technique was tested for gas turbine exhaust gases. The concentration measu rement gave reliable data. The thermometry was obtained using O<12>(1.5)line at 226.89nm and O^_<12>(19.5)line at 226.90nm line for relatively lower temperature. The selections of the excitation lines were not adequate for getting accurate data.
2.A standard addition measurement technique by Laser-Induced Breakdown Spectroscopy(LIBS)was developed for low-concentration elements in solids. The technique was applied to the element detection in coal burnt ashes. Mass fractions of Mn and Cr were obtained. The mass fraction of Mn was 453±17ppm in good agreement with the other chemical analysis data of 464ppm. The Cr concentration was determined 145ppm by saturation curve fitting. The method was also introduced in the measurement of soil contamination. The concentrations of Cd and Pb were 129±12ppm and 28.7ppm, respectively. It was demonstrated that these techniques are viable diagnostic tools in practical use.
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Research Products
(24 results)
