Kinetics of Cl Atom Reactions with Methane, Ethane, and Propane from 292 to 800 K
Kinetics of Cl Atom Reactions with Methane, Ethane, and Propane from 292 to 800 K
复制标题
292 至 800 K 范围内 Cl 原子与甲烷、乙烷和丙烷反应的动力学
DOI：
--
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
C. Taatjes
中科院分区：
文献类型：
--
作者：
J. Pilgrim;†‡ and Andrew McIlroy;C. Taatjes
用激光光解/连续波红外长程吸收法（LP/cwIRLPA）测定了氯原子与甲烷和乙烷在292 ~ 800 K以及与丙烷在292 ~ 700 K反应的绝对速率系数。一种新颖的反应器设计和光学布置允许长的吸收路径，并精确控制探测体积中的温度。甲烷的速率系数在292 - 800 K之间表现出明显的曲率，在此温度范围内可以用修正的阿克里尼乌斯表达式描述，kCH 4（T）= [3.7（）× 10-13 cm 3 molecule-1 s-1]（T/298）2.6（±0.7）exp[−385（±320）/T]（所有误差条仅为±2σ精度）。在292 - 600 K的温度范围内，乙烷的反应速率与早期的研究结果吻合得很好，符合一个简单的阿克里尼乌斯表达式kC 2 H6（T）= 8.6（±0.5）× 10-11 exp[-135（±26）/T] cm 3 molecule-1 s-1。然而，随着温度升高超过600 K，阿克里乌斯图表现出显着的向上弯曲。在292 - 8的范围内...
Absolute rate coefficients for the reactions of chlorine atom with methane and ethane between 292 and 800 K and with propane between 292 and 700 K have been determined using the laser photolysis/continuous wave infrared long-path absorption method, LP/cwIRLPA. A novel reactor design and optical arrangement allow long absorption paths with precise control of the temperature in the probed volume. The rate coefficient for methane exhibits significant curvature between 292 and 800 K and can be described over this temperature range by a modified Arrhenius expression, kCH4(T) = [3.7( ) × 10-13 cm3 molecule-1 s-1](T/298)2.6(±0.7) exp[−385(±320)/T] (all error bars are ±2σ precision only). In the temperature range 292−600 K the rate with ethane agrees well with earlier investigations, fitting a simple Arrhenius expression kC2H6(T) = 8.6(±0.5) × 10-11 exp[−135(±26)/T] cm3 molecule-1 s-1. However, as the temperature increases beyond 600 K the Arrhenius plot exhibits significant upward curvature. Over the range 292−8...