The effect of Mg-based additive on aerosol characteristics in medium-speed diesel engines operating with residual fuel oils

Jussi Lyyränen, Jorma Jokiniemi (Corresponding Author), Esko Kauppinen

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26 Citations (Scopus)

Abstract

Aerosol measurements were carried out to determine particle formation and characteristics produced in a 4-stroke, turbo-charged diesel engine operating with high ash-content heavy fuel oil with and without a Mg-based additive.
The mass size distributions are bimodal (modes at 0.1 and , aerodynamic size) without additive and have three modes (additional mode at ) with the additive. It was found that the mode was generated by magnesium together with some vanadium, nickel and sulphur.
The primary particles are formed by nucleation of the volatilised fuel oil ash species that further grow by condensation and agglomeration. The mode particles are mainly re-entrained from deposits and fuel residue particles of different sizes. Primary particle size is about 40– as observed in the SEM and TEM micrographs.
It appears that the fine particles ( mode) are more spheroidal and catenulate with the additive than without.
Original languageEnglish
Pages (from-to)967-981
JournalJournal of Aerosol Science
Volume33
Issue number7
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

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Keywords

  • diesel engines
  • corrosion
  • aerosols
  • hot corrosion

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