The role of CO on microexplosion of iron particle in methane-air premixed flames

Aris Purwanto, Bo Cheng Zhuang, Yueh Heng Li

Research output: Contribution to conferencePaperpeer-review

Abstract

When aluminum is mixed with zirconium, aluminum would evaporate and oxidize with oxygen. Alumina would attach with zirconium. Nitrogen and oxygen would dissolve into zirconium particles and form bubbles. Then, bubbles would grow gradually due to nucleation. However, the severe growth rate of bubbles led to micro-explosion phenomena. It is a so-called particle microexplosion for Al-Zr hybrid metal combustion. In the previous study, an iron-coal mixture was delivered to methane-air premixed flames, and an exciting particle microexplosion phenomenon was observed during this experiment. In our proposed speculation, the presence of CO may dissolve in iron particles and produce bubbles. A portion of CO bubbles may react with iron and yield iron carbonyl (Fe(CO)5).Consequently, the merged bubbles would gradually increase their inner pressure, and meantime combustible mixture of iron carbonyl and oxygen may induce the microexplosion. To elucidate the role of CO in the microexplosion mechanism, a hybrid iron-methane air premixed flame diluted with different concentrations of CO was used to observe the mechanism of particle microexplosion. The particle concentration varied from 0 – 350 g/m3. Therefore, it conjectures that CO was dissolved into iron particles, giving rise to expanding the volume of a metal particle and inducing microexplosion.

Original languageEnglish
Publication statusPublished - 2021 Aug 31
Event15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021 - Edinburgh, United Kingdom
Duration: 2021 Aug 292021 Sept 2

Conference

Conference15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021
Country/TerritoryUnited Kingdom
CityEdinburgh
Period21-08-2921-09-02

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

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