Influence of major biodiesel components on soot formation in biodiesel co-flow jet flames

Authors

  • Royston Mwikathi Kiraithe
  • Josephat Kipyegon Tanui Dedan Kimathi University of Technology
  • Paul Ndirangu Kioni

Keywords:

Soot formation, Biodiesel, Methyl esters, Soot model, Jet flame, Co-flow

Abstract

Soot formation in biodiesel combustion was studied by focusing on the major components in isolation. The aim of the study was to establish the influence of major components on soot production in combustion of biodiesel in co-flow jet flames. The components investigated in this study were methyl linolenate (MLe), methyl stearate (MS), methyl oleate (MO), methyl linoleate (MLi) and methyl palmitate (MP). The study was based on Moss-Brooke’s soot model.  A reduced kinetic mechanism for the pyrolysis and combustion of biodiesel surrogates with 177 chemical species and 2904 chemical reactions was implemented. Nucleation rate, coagulation rate, oxidation rate and soot volume fraction were investigated under laminar flow conditions. It was established that unsaturated methyl esters had higher soot formation rates than their saturated counterpart. MLe had a greatest influence in soot formation due to its relatively higher nucleation rate, coagulation rate, oxidation rate and soot volume fraction while MS had the least at the same boundary conditions. Analysis of the flame structure reveals that the higher nucleation rates are correlated to higher content of aromatic species in the immediate chemical reactions.

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Published

2024-04-23

How to Cite

Kiraithe, R. M., Tanui, J. K., & Kioni, P. N. (2024). Influence of major biodiesel components on soot formation in biodiesel co-flow jet flames. JOURNAL OF SUSTAINABLE RESEARCH IN ENGINEERING, 8(1), 1-16. Retrieved from https://jsre.jkuat.ac.ke/index.php/jsre/article/view/184