HRTEM Study of diesel soot collected from diesel particulate filters

被引：222
作者：
Vander Wal, Randy L.
Yezerets, Aleksey
Currier, Neal W.
Kim, Do Heui
Wang, Chong Min
机构：
[1] NASA, Glenn Res Ctr, USRA, Cleveland, OH 44135 USA
[2] Cummins Inc, Columbus, IN 47201 USA
[3] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA
来源：
CARBON | 2007年 / 45卷 / 01期
关键词：
D O I：
10.1016/j.carbon.2006.08.005
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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. (c) 2006 Elsevier Ltd. All rights reserved.
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收藏
页码：70 / 77
页数：8
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