Chemical Characterization of Heterogeneous Inclusions in Soot Particles
EMSL Project ID
7804
Abstract
The objective of the work proposed herein is to characterize the heterogeneous inclusions and their influence on the hydroscopic properties of Diesel and laboratory-generated soot. Laboratory soot will be generated from a laminar premixed flat flame at the University of Delaware. The experimental configuration has been extensively used in our previous study of soot nucleation and the role of iron in soot formation. Soot will be synthesized and collected on a substrate using a rapid insertion technique. The morphology, structure, and composition of soot will be varied by varying the flame temperature, flow velocity, and equivalence ratio. The soot sample will be prepared prior to the proposed study at EMSI. If required, additional samples can be prepared by the research personnel at UDel. Diesel soot will be collected by Dr. Laskin from dynamometer engine facility located at Oak Ridge National Lab (ORNL). Test sampling of diesel soot at ORNL is scheduled for April 2004. It will include sampling at different engine regimes and sampling from engine running with different lubricants and oil additives which are known sources of the heteroelement inclusions in soot. We plan to use Computer Controlled Scanning Electron Microscope coupled with X-ray Microanalysis System (CCSEM/EDX) to map the chemical composition of soot, and high resolution Transmission Electron Microscopy to determine the microstructure of soot. Fourier-transform Infrared Spectroscopy (FTIR) coupled to optical microscope with hydration cell will be explored in this project to probe the surface functional group that is responsible for the hygroscopic properties. The Environmental Scanning Electron Microscopy (ESEM) will be used to monitor hygroscopic changes of soot particles in real time.
Project Details
Project type
Exploratory Research
Start Date
2004-02-25
End Date
2007-01-08
Status
Closed
Released Data Link
Team
Principal Investigator
Related Publications
Xu J, M Blaakmeer, AS Lipton, TM Mcdonald, MY Liu, B Smit, JR Long, APM Kentgens, and J Reimer. 2017. "Uncovering the Local Magnesium Environment in the Metal–Organic Framework Mg2(dobpdc) Using 25Mg NMR Spectroscopy." Journal of Physical Chemistry C 121(36):19938–19945. doi:10.1021/acs.jpcc.7b07809
Xu J., M. Liu, A.S. Lipton, J. Ye, G. Hoatson, P.J. Milner, and T.M. Mcdonald, et al. 2019. "Amine Dynamics in Diamine-Appended Mg2(dobpdc) Metal-Organic Frameworks." Journal of Physical Chemistry Letters 10, no. 22:7044-7049. PNNL-SA-131857. doi:10.1021/acs.jpclett.9b02883