Effects of fuel additives on the microstructure of combustion engine deposits

Effects of fuel additives on the microstructure of combustion engine deposits The microstructure of spark-ignition (SI) engine deposits produced from fuels with two commonly used gasoline additives, polyether amine and polybutene amine, were studied by gas adsorption technique and Raman spectroscopy. The lateral sizes of graphitic crystallites were found to increase upon addition of the additives. The surface areas of the deposits were evaluated using the BET and DR theories. Density functional theory was used to evaluate pore size distribution. The majority of the internal surface area of the deposits is due to narrow pores of widths of about 0.5 nm. The surface area of the deposits decreases with increased concentration of the additives, and this process is more efficient for polybutene amines than polyether amines. The structure of the deposits removed from the combustion chamber’s cylinder heads is more porous than that of piston top deposits. Likewise, intake valve deposits were seen to be less porous than combustion chamber deposits. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Carbon Elsevier

Effects of fuel additives on the microstructure of combustion engine deposits

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Publisher
Elsevier
Copyright
Copyright © 2001 Elsevier Science Ltd
ISSN
0008-6223
D.O.I.
10.1016/S0008-6223(00)00287-6
Publisher site
See Article on Publisher Site

Abstract

The microstructure of spark-ignition (SI) engine deposits produced from fuels with two commonly used gasoline additives, polyether amine and polybutene amine, were studied by gas adsorption technique and Raman spectroscopy. The lateral sizes of graphitic crystallites were found to increase upon addition of the additives. The surface areas of the deposits were evaluated using the BET and DR theories. Density functional theory was used to evaluate pore size distribution. The majority of the internal surface area of the deposits is due to narrow pores of widths of about 0.5 nm. The surface area of the deposits decreases with increased concentration of the additives, and this process is more efficient for polybutene amines than polyether amines. The structure of the deposits removed from the combustion chamber’s cylinder heads is more porous than that of piston top deposits. Likewise, intake valve deposits were seen to be less porous than combustion chamber deposits.

Journal

CarbonElsevier

Published: Aug 1, 2001

References

  • A comparison of diesel engine soot with carbon black
    Clague, A.D.H.; Donnet, J.B.; Wang, T.K.; Peng, J.C.M.
  • Surface area, pore size distribution and microstructure of combustion engine deposits
    Zerda, T.W.; Yuan, X.; Moore, S.M.; Leon y Leon, C.A.
  • Raman spectrum of graphite
    Tuinstra, F.; Koenig, J.L.

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