Abstract
Profiles of SiO mole fraction have been obtained in low pressure premixed hydrogen/oxygen/hexamethyldisilazane (HMDS) flames by laser-induced fluorescence and emission spectroscopy. SiO is observed to form early in the flame at temperatures near 1100 K. The flame equivalence ratio has only a small effect on the SiO mole fraction, but the precursor concentration has a marked effect on both the peak mole fraction and shape of the profile. The SiO observed in the flame appears to be from two sources: SiO produced directly from precursor pyrolysis, and SiO that is generated as the partial pressure from the solid SiO in the flame. A comparison of ground state and excited state profiles indicates that the emission from SiO is chemiluminescence rather than thermal emission. A computational flow model incorporating current Si/H/O chemical mechanisms is able to qualitatively reproduce some aspects of the observed profiles, but significant discrepancies remain. The profiles presented in this study can serve as a test against which future chemical and process models may be validated.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
