Environmental Chemistry of Soot Particles
EMSL Project ID
40027
Abstract
We propose to examine molecular composition of laboratory-generated and aircraft engine soot using complementary methods of chemical analysis. First, soot will be examined using IR spectroscopy in a micro-FTIR setup. Composition of soot will be determined as a function of engine power setting and particle size. Molecular content of soot particles will be probed using novel method of Discharge-Induced Oxidation in Desorption Electrospray Ionization - Mass Spectrometry (DESI-MS) analysis approach. Non-polar molecular constituents of soot may be speciated with this technique to further understand soot chemistry. The same technique will be applied to soot generated in laboratory flat flame burner setup. Correlations will be made between soot chemistry and flame temperature, sampling height and particle size. Performing micro-FTIR and DESI-MS measurements on both samples will allow comparisons to between laboratory generated and real world samples and will indicate how the concentration of molecular functionalities changes at different combustion conditions.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2010-10-01
End Date
2013-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Cain JP, J Camacho, DJ Phares, H Wang, and A Laskin. 2011. "Evidence of Aliphatics in Nascent Soot Particles in Premixed Ethylene Flames." Proceedings of the Combustion Institute 33(1):533-540. doi:doi:10.1016/j.proci.2010.06.164