Kinetic Study of the Equilibrium between C2H5S and O2 and the Reaction of C2H5SO2 with NO2

• Main Authors: Tsai. Ming Chang, 蔡明蒼
• Other Authors: 王念夏
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/49581744726288911036

碩士 === 國立交通大學 === 應用化學系 === 89 === A Laser Photolysis─Laser Induced Fluorescence (LP─LIF) system has been used to study the reaction kinetics of the equilibrium between C2H5S and O2 and the reaction of C2H5SO2 with NO2 at 223－258 K, and 50－200 torr of total pressure.C2H5S radicals were produced by photolyzing C2H5SSC2H5 molecules with an excimer laser output at 248 nm.The concentration of C2H5S radicals was monitored at 410.3 nm with an excimer-pumped dye laser. We observed bi-exponential decay of C2H5S in the presence of O2 which implied an equilibrium between them.The equilibrium constants were determined at temperatures 228－258 K, Keq(T)＝(1.44±0.35) ×10－27 exp[(5325±512)/T] cm3 molecule－1.The rate constant of C2H5SO2 with NO2 was also derived as k2(T)＝(4.88±1.35) ×10－12 exp [(886±219)/T] cm3 molecule-1 s-1 at 234－254 K.