HRTEM Study of Diesel Soot Collected from Diesel Particulate Filters
HRTEM study of several soot samples collected on Diesel Particulate Filters (DPF) under conditions relevant to practical applications of DPF technology, revealed nano-structure, to our knowledge, not reported previously for diesel soot. In particular, some of the primary particles were found to have hollow interior, and the outer shell exhibiting evidence of graphitization, with a higher crystallinity compared to the non-hollowed particles. The percentage of such particles varied between different soot samples and tentatively appeared to be related to the oxidation history of the sample. Remarkably, similar effect was not reproduced for a carbon black sample, Printex-U, suggesting that propensity to such oxidation-induced graphitization is related to the original nano-structure of the particle. These initial observations were independently confirmed for the same set of soot samples by two different HRTEM facilities, at NASA-Glenn and PNNL.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 900920
- Report Number(s):
- PNNL-SA-51531; CRBNAH; 8391; VT0401000; TRN: US200713%%24
- Journal Information:
- Carbon, 45(1):70-77, Vol. 45, Issue 1; ISSN 0008-6223
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nondestructive X-ray Inspection of Thermal Damage, Soot and Ash Distributions in Diesel Particulate Filters
Differential kinetic analysis of diesel particulate matter (soot) oxidation by oxygen using a step–response technique