碩士生: 多亞立 Aris Purwanto
畢業年月: 2021年10月
論文名稱: 微米級鐵顆粒在甲烷/空氣預混火焰之微爆現象研究 / Study of microexplosion mechanism of iron microparticles in premixed methane/air flames
中文摘要:
金屬顆粒具有高體積能量密度，金屬混合火焰比氣態碳氫火焰具更高的能量與火焰溫度。本研究探討鐵顆粒粒徑（2–10 μm、50 μm、100 μm與150 μm）對微爆的影響，在化學計量比的預混錐形甲烷—空氣火焰中以不同進料率摻入鐵顆粒。氧化劑擴散進入顆粒並形成薄氧化殼層，有限的氧在表面生成中間產物FeO，使顆粒在燃燒中閃爍與收縮。加入CO後，CO穿透殼層與內部氧化物反應，產生氣泡並生成五羰基鐵Fe(CO)5；氣泡凝聚使顆粒逐漸膨脹為空心球，在特殊條件下五羰基鐵會引發微爆。
英文摘要:
Metal particles have high volumetric energy density, and metal-mixed flames are hotter and more energetic than gaseous hydrocarbon flames. This thesis investigates how iron particle size (2-10 μm, 50 μm, 100 μm, and 150 μm) influences micro-explosion, feeding iron into a stoichiometric premixed methane-air conical flame at various feed rates. Oxidizer diffuses into a particle and forms a thin iron oxide shell, with limited oxygen producing FeO at the surface and causing flickering and contraction. When CO is added, it penetrates the shell and reacts with the oxide inside, generating bubbles and iron pentacarbonyl, Fe(CO)5. As bubbles coalesce the particle expands into a hollow sphere, and under certain conditions the iron pentacarbonyl triggers micro-explosion.
