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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Shock-Tube Measurement of Acetone Dissociation Using Cavity-Enhanced Absorption Spectroscopy of CO
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Shock-Tube Measurement of Acetone Dissociation Using Cavity-Enhanced Absorption Spectroscopy of CO

机译：利用腔腔吸收吸收光谱法对丙酮离解进行冲击管测量

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A direct measurement for the rate constant of the acetone dissociation reaction (CH3COCH3 = CH3CO + CH3) was conducted behind reflected shock wave, utilizing a sub-ppm sensitivity CO diagnostic achieved by cavity-enhanced absorption rspectroscopy (CEAS). The current experiment eliminated the influence from secondary reactions and temperature change by investigating the clean pyrolysis of <20 ppm acetone in argon. For the first time, the acetone dissociation rate constant (k(1)) was directly measured over 5.5 orders of magnitude with a high degree of accuracy: k(1) (1004-1494 K, 1.6 atm) = 4.39 X 10(55) T-11.394 exp(-52 140K/T) +/- 24% s(-1). This result was seen to agree with most previous studies and has bridged the gap between their temperature and pressure conditions. The current work also served as an example demonstration of the potential of using the CEAS technique in shock-tube kinetics studies.
机译：在反射冲击波之后，利用通过腔增强吸收光谱法（CEAS）实现的亚ppm灵敏度的CO诊断，直接测量了丙酮离解反应的速率常数（CH3COCH3 = CH3CO + CH3）。当前的实验通过研究氩气中<20 ppm丙酮的纯净热解，消除了副反应和温度变化的影响。首次以高准确度直接在5.5个数量级上直接测量了丙酮的解离速率常数（k（1））：k（1）（1004-1494 K，1.6 atm）= 4.39 X 10（55） ）T-11.394 exp（-52 140K / T）+/- 24％s（-1）。该结果被认为与大多数先前的研究一致，并弥合了它们的温度和压力条件之间的差距。当前的工作还作为示例演示了在冲击管动力学研究中使用CEAS技术的潜力。

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