Particle Combustion Characteristics of Iron Iron mixed with Aluminum and Iron mixed with Coal in Methane-Air Premixed Flames

  • 馮 椲程

Student thesis: Doctoral Thesis

Abstract

High energetic metal fuels regarded as a clean and recyclable energy carrier are promising reactive materials to apply for the future low-carbon emission Higher energy density materials are the potential to substitute fossil fuel in energy sectors for coping with the imminent global warming and energy crisis issues In this study the main purpose is to analyze and investigate the combustion behaviors of pure iron particles and mixing particles namely iron?aluminum and iron?coal in hybrid methane?air premixed flames The mechanically mixing particles were prepared based on the weight with a ratio of 1:1 Thermal gravimetry analysis for Fe and Fe?Coal illustrates similar oxidation range in a quite low-temperature region whilst Fe?Al mixture presents a multi-stage oxidation process Methane?air conical premixed flame in the stoichiometric condition was seeded with micron-sized solid fuels over a small range of feeding rates It appeared that an increase of solid particles seeding would alter the hybrid flame front A series of relevant experiments explore the interdependency between solid fuels and a methane?air premixed flame and some underlying issues such as changes in burning velocity flame temperature gas emission and metal oxide product Uniquely particle micro-explosion phenomena were observed in the Fe?Coal hybrid combustion It conjectures that CO gas was trapped inside the thin porous iron oxide and led to the inception of iron carbonyl production Combustible CO and iron carbonyl induced the inner combustion leading to the particle torn or cracked Ultimately adding CO and metal organic frameworks (MOF) powder in a hybrid Fe flame was engaged to support the speculation of the proposed particle micro explosion mechanism
Date of Award2020
Original languageEnglish
SupervisorYueh-Heng Li (Supervisor)

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