碩士生: 馮椲裎
畢業年月: 2020年7月
論文名稱: 甲烷/空氣預混火焰通入鐵、鐵-鋁，與鐵-煤之顆粒燃燒特性探討 / Particle combustion characteristics of iron, iron mixed with aluminum, and iron mixed with coal in methane-air premixed flames
中文摘要:
高能金屬燃料是潔淨且可回收的能源載體，有望用於未來低碳應用。本研究分析純鐵顆粒，以及重量比1:1機械混合的鐵—鋁與鐵—煤顆粒，在甲烷—空氣預混火焰中的燃燒行為。熱重分析顯示Fe與Fe—煤在相近的低溫區間氧化，Fe—Al則為多階段氧化。實驗將微米級固體燃料以小進料率摻入化學計量比的錐形甲烷—空氣火焰，探討火焰鋒面、燃燒速度、火焰溫度、氣體排放與金屬氧化物的變化。Fe—煤燃燒時觀察到顆粒微爆，推測CO被困於薄而多孔的氧化鐵殼內並生成羰基鐵，其內部燃燒使顆粒破裂；於鐵火焰中添加CO與金屬有機框架（MOF）粉末亦支持此機制。
英文摘要:
High-energy metal fuels are promising clean, recyclable energy carriers for low-carbon applications. This thesis analyzes the combustion of pure iron particles and 1:1 (by weight) mechanically mixed iron-aluminum and iron-coal particles in methane-air premixed flames. Thermogravimetric analysis shows Fe and Fe-coal oxidizing over a similar low-temperature range, while Fe-Al oxidizes in multiple stages. Micron-sized fuels are seeded into a stoichiometric conical methane-air flame at small feed rates, and changes in flame front, burning velocity, temperature, emissions, and oxide products are examined. Particle micro-explosions are observed with Fe-coal: CO trapped in the thin porous iron oxide shell is thought to form iron carbonyl, and the resulting internal combustion tears the particle. Adding CO and metal organic framework powder to an iron flame supports this mechanism.
