燃燒化學中重要自由基之反應動力學研究(IV)

Abstract

我們計畫研究燃燒化學中重要自由基的反應動力學。首先利用一套無膜震波管／原子 吸收光譜系統，研究在高溫下(> 1500 K) CH2 自由基與CH4 及C2H4 之反應動力學。CH2 由熱解CH2I2 而得，以原子共振吸收技術偵測氫原子濃度之時間變化，並與詳細之反 應機制比對配合以電腦模擬來得到動力學資訊。研究所得結果將與理論計算之結果相 比較，可提供重要的動力學資料。

The reaction kinetics of CH2 radicals with CH4 and C2H4 will be studied in our laboratory using a diaphragmless shock tube coupled with atomic resonance absorption spectroscopy technique at elevated temperatures (1700 - 2100 K). Thermal decomposition of CH2I2 will be used to generate CH2 radicals and H atom will be detected. Kinetic information will be yielded by fitting the temporal profiles of the atomic species to detailed mechanisms. Our results will be compared with that of theoretical calculations and offer valuable information to the combustion of hydrocarbon fuel.