167933 20260122172506.0 doi 10.1016/j.combustflame.2020.03.033 sideral 117739 ART-2020-117739 eng Muelas, Álvaro Universidad de Zaragoza (orcid)0000-0003-1337-0310 Pyrolysis effects during high-temperature vaporization of alkane droplets 2020 The temporal evolution of the droplet radius is measured experimentally in high-temperature inert atmospheres for three different alcohols (ethanol, n-butanol, and glycerol) and three alkanes (n-heptane, n-dodecane, and n-hexadecane). It is shown that, while accompanying theoretical predictions of droplet-radius variations show excellent accuracy for the three alcohols, the three alkanes exhibit vaporization rates that are significantly smaller than those predicted theoretically. The accompanying observation of significant soot formation suggests that endothermic fuel pyrolysis may be responsible for the diminished vaporization rate. The quantification of this phenomenon is investigated here using a one-step irreversible reaction with an Arrhenius rate to model the fuel decomposition. It is shown how an analytical description developed on the basis of activation-energy asymptotics can be used in combination with the experimental measurements of the temporal droplet-radius evolution to adjust the fuel-pyrolysis kinetics, embodied at leading order in an effective pyrolysis temperature, which is obtained for n-heptane, n-dodecane, and n-hexadecane. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MEC/FPU15-01866 info:eu-repo/grantAgreement/ES/MINECO-FEDER/ENE2016-76436-R info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 4.185 2020 ENGINEERING, MECHANICAL 24 / 133 = 0.18 2020 Q1 T1 THERMODYNAMICS 9 / 60 = 0.15 2020 Q1 T1 ENGINEERING, MULTIDISCIPLINARY 17 / 90 = 0.189 2020 Q1 T1 ENGINEERING, CHEMICAL 44 / 143 = 0.308 2020 Q2 T1 ENERGY & FUELS 52 / 114 = 0.456 2020 Q2 T2 1.89 2020 Chemical Engineering (miscellaneous) 2020 Q1 Chemistry (miscellaneous) 2020 Q1 Physics and Astronomy (miscellaneous) 2020 Q1 Fuel Technology 2020 Q1 Energy Engineering and Power Technology 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Carpio, Jaime Ballester, Javier Universidad de Zaragoza (orcid)0000-0003-2863-4681 Sánchez, Antonio L. Williams, Forman A. 5001 600 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Mecánica de Fluidos 217 (2020), 38-47 Combust. flame Combustion and Flame 0010-2180 9291114 http://zaguan.unizar.es/record/167933/files/texto_completo.pdf Postprint 1427448 http://zaguan.unizar.es/record/167933/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:167933 articulos driver 2026-01-22-16:07:13 ARTICLE