近年來，豐富且大量的甲烷/燃料水合物蘊藏量吸引了世界各地能源策略和研究觀點上廣泛的注意。已有團隊提出了在水合甲烷蘊藏區經直接燃燒水合甲烷並將其燃燒能轉換成電能，而燃後的產物-二氧化碳直接於水合甲烷蘊藏區置換成二氧化碳水合物的概念。但水合甲烷的直接(對流)燃燒是不穩定的，並且由於水合物表面水層的累積或是因自保效應的現象導致水合甲烷火焰熄滅。本研究提出並開發了一種新型的多孔性燃燒器，用於維持水合甲烷火焰穩定燃燒以利進行進一步的研究。 並以一通過火焰之碳化矽纖維的輻射量，利用顏色比率薄絲測溫法 (Thin filament pyrometry, TFP)來量測水合甲烷火焰的軸向溫度，火焰位置和火焰寬度，而水合甲烷火焰溫度約1700K。同時還利用實驗與數值模擬的方法來研究甲烷水合物的特徵火焰型態、火焰結構。此外，還針對了高比例的水蒸氣添加於非預混的CH4 /Air中的化學反應途徑影響進行數值模擬之研究，其結果表示，通過大量的水分子會經由R86被分解，使OH自由基生成率提升，並促進CH4逐步脫氫轉換成CH3和CH3轉化為CH2 (s)，CH2O轉化為HCO，最後CO氧化成CO2，皆為水合甲烷之氧化反應提供了另一條途徑。

The tremendously large amount of methane/fuel hydrate reserves attracts extensive attentions both from strategic and research viewpoints. The concept of direct energy conversion into electricity and direct waste carbon dioxide replacement by in situ combustion has been proposed. The free (convection) burning of methane hydrates is unstable and flame extinction can occur due to water film layer buildup or self-preservation phenomena. A novel porous burner to maintain a stable methane hydrate flame for further experimental investigation is proposed and developed in this study. Axial temperature, flame location, and flame width were measured using color-ratio thin filament pyrometry (TFP) from the radiative emission of a Silicon Carbide fiber that is oriented across the flame. The hydrate flame temperatures are found to be close to 1700 K. The characteristic flame patterns, flame structure of methane hydrate flame are studied using experimental and numerical methods. Furthermore, the chemical effects of high percentage of water vapor addition on the reaction pathway of non-premixed CH4/Air flame are numerically investigated and the results show that the enhanced OH radical production through water decomposition (R86) promotes progressive dehydrogenations of CH4 to CH3 and CH3 to CH2(s) and CH2O to HCO, and finally oxidation of CO to CO2, providing other pathways for methane hydrate oxidation reaction.

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