本研究主要於介觀型燃燒器中，利用創意分段式觸媒搭配空腔的流道配置型態，以實驗與模擬的方式顯現觸媒反應與氣相反應共同存在的燃燒特性與機制。在固定觸媒總長度的前提之下，傳統單段式觸媒與分段式觸媒比較後可以發現，分段式觸媒可有效幫助此介觀型燃燒器中的流道於非觸媒段處順利引燃出氣相反應，達到觸媒反應與氣相反應互相輔助共同存在的特點；分段式觸媒相鄰的間隔處因周遭的觸媒反應產生的熱能及中間產物可有助於氣相反應的產生與維持，同時也由數值模擬可以看出，氫氣燃料在單段式觸媒中僅少部分的消耗，但於分段式觸煤的配置中因觸媒反應與氣相反應共存的環境下，可將大部份的燃料H2快速消耗掉，減少未燃氣體排出燃燒器的機會，而分段式觸媒中，又以2mm × 8的配置方式，其觸媒與氣相反應共存的範圍較廣些，但於高流速下火焰會很容易被吹出流道外，因此將分段式觸媒之間的間隔處改以空腔的配置方式，藉由空腔可有效提供一低速迴流區，提供流道中的火焰於高流速下一個穩駐機制，且有效擴展了觸媒與氣相反應共存的操作區間。

This research mainly addresses the combustion characteristics and mechanism of multi-segment catalyst and cavity in a meso-scale burner by means of experiments and numerical simulation with detailed hetero- and homogeneous reaction. Compared with traditional single catalyst and multi-segment catalyst with the same total catalyst length, it found that multi-segment catalyst can induce the gas reaction anchoring in non-catalyst walls in a meso-scale burner, and yield the coexistence of surface reaction and gas reaction in the channel instead of competition between hetero- and homogeneous reaction. In the proposed catalyst configuration, the surface (heterogeneous) reaction in a prior catalyst segment produces chemical radicals and catalytically induced exothermicity, and the gas (homogeneous) reaction is subsequently induced and anchored in the following non-catalyst wall/or cavity. In a meantime, numerical simulation indicates that hydrogen has rare fuel consumption in a single catalyst burner, but has rush fuel consumption in a multi-segment catalyst via cooperating between hetero- and homogeneous reaction. Among multi-segment catalyst layouts, the catalyst layout with 2mm×8 sections has an extensive operation of hetero- and homogeneous coexistence. Nevertheless, flames are prone to be blow out in high flow velocity conditions, so that the inert walls between adjacent segment catalysts are further replaced with cavities implement. The cavities can effectively provide a low-velocity recirculation zone to stabilize flames in relatively high flow rates and successfully extend the operational range of hetero- and homogeneous coexistence.

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