Application of linear Raman spectroscopy for the determination of acetone decomposition.

Acetone (CH3)2CO is a common tracer for laser-induced fluorescence (LIF) to investigate mixture formation processes and temperature fields in combustion applications. Since the fluorescence signal is a function of temperature and pressure, calibration measurements in high pressure and high temperature cells are necessary. However, there is a lack of reliable data of tracer stability at these harsh conditions for technical application. A new method based on the effect of spontaneous Raman scattering is proposed to analyze the thermal stability of the tracer directly in the LIF calibration cell. This is done by analyzing the gas composition regarding educts and products of the reaction. First measurements at IC engine relevant conditions up to 750 K and 30 bar are presented.

[1]  A. Leipertz,et al.  Simultaneous Quantitative Measurements of Temperature and Residual Gas Fields Inside a Fired SI-Engine Using Acetone Laser-Induced Fluorescence , 2009 .

[2]  G. Ingram,et al.  The pyrolytic identification of organic molecules: II. A quantitative evaluation , 1974 .

[3]  Thomas Seeger,et al.  Application of 266-nm and 355-nm Nd:YAG laser radiation for the investigation of fuel-rich sooting hydrocarbon flames by raman scattering. , 2004, Applied optics.

[4]  Ronald K. Hanson,et al.  Simultaneous Imaging of Exhaust Gas Residuals and Temperature During HCCI Combustion , 2009 .

[5]  Volker Sick,et al.  Toluene laser-induced fluorescence for in-cylinder temperature imaging in internal combustion engines , 2008 .

[6]  R. Hanson,et al.  Temperature imaging with single- and dual-wavelength acetone planar laser-induced fluorescence. , 1997, Optics letters.

[7]  Tinggang Li,et al.  The combustion of simple ketones II—Mechanism at ‘high’ temperatures , 1968 .

[8]  Investigation of toluene LIF at high pressure and high temperature in an optical engine , 2009 .

[9]  C. Hinshelwood,et al.  A Homogeneous Unimolecular Reactions-The Thermal Decomposition of Acetone in the Gaseous State , 1926 .

[10]  Volker Sick,et al.  Measurement of temperature, fuel concentration and equivalence ratio fields using tracer LIF in IC engine combustion , 2000 .

[11]  Kenji Fukui,et al.  2-D Temperature Measurements of Unburned Gas Mixture in an Engine by Two-line Excitation LIF Technique , 2006 .

[12]  Ronald K. Hanson,et al.  CW laser-induced fluorescence of toluene for time-resolved imaging of gaseous flows , 2010 .

[13]  H. Wagner,et al.  Untersuchungen zum thermischen Zerfall von Acetaldehyd und Aceton , 1976 .

[14]  Y. Hidaka,et al.  Shock-tube and modeling study of acetone pyrolysis and oxidation , 2000 .