Structure and size of soot nanoparticles in laminar premixed flames at different equivalence ratios

Structure and size of soot nanoparticles in laminar premixed flames at different equivalence ratios In this work, the physicochemical properties of flame-formed soot particles are investigated in a set of ethylene/air premixed flames as function of the equivalent ratio. The objective of this study is to highlight the peculiar characteristics of the particles produced under quasi-clean combustion conditions in comparison with soot formed in richer flames.The size distribution of flame-formed soot nanoparticles was measured by differential mobility analysis; particle composition by Raman and UV–vis light absorption spectroscopy and morphology by atomic force microscopy.Our results evidence that the particle size distribution is strongly affected by the flame equivalence ratio. Slightly rich flames produce mono-modal PSD with very small particles of only few nanometers. Bi-modal size distribution are found in richer flames when larger particles, i.e., 5–20 nm, are formed. Change from a mono-modal to a bi-modal particle size distribution can be related to changes in particle graphitization as evidenced by a slight increase of the in plane average size of the polyaromatic units within the particles, La, and a change in particle optical properties. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Fuel Elsevier

Structure and size of soot nanoparticles in laminar premixed flames at different equivalence ratios

Loading next page...
 
/lp/elsevier/structure-and-size-of-soot-nanoparticles-in-laminar-premixed-flames-at-X9nZJk10i9
Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0016-2361
D.O.I.
10.1016/j.fuel.2017.12.032
Publisher site
See Article on Publisher Site

Abstract

In this work, the physicochemical properties of flame-formed soot particles are investigated in a set of ethylene/air premixed flames as function of the equivalent ratio. The objective of this study is to highlight the peculiar characteristics of the particles produced under quasi-clean combustion conditions in comparison with soot formed in richer flames.The size distribution of flame-formed soot nanoparticles was measured by differential mobility analysis; particle composition by Raman and UV–vis light absorption spectroscopy and morphology by atomic force microscopy.Our results evidence that the particle size distribution is strongly affected by the flame equivalence ratio. Slightly rich flames produce mono-modal PSD with very small particles of only few nanometers. Bi-modal size distribution are found in richer flames when larger particles, i.e., 5–20 nm, are formed. Change from a mono-modal to a bi-modal particle size distribution can be related to changes in particle graphitization as evidenced by a slight increase of the in plane average size of the polyaromatic units within the particles, La, and a change in particle optical properties.

Journal

FuelElsevier

Published: Mar 15, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial