中文摘要：

论文研究乙醇对正庚烷氧化过程的影响。采用同步辐射方法测量当量比为1．0时正庚烷／氧气／氩气，以及正庚烷／乙醇／氧气／氩气低压层流预混火焰中主要成分的浓度。研究结果表明，添加乙醇改变了正庚烷向己烷裂解的路线，促进了庚烷直接裂解成丁烯基的趋向，但丁烷、戊烷都仍是正庚烷的主要裂解产物。添加乙醇，火焰中环己二烯、环戊二烯浓度增加，而且出现了乙烯醇、丁醇。研究结果可作为乙醇燃烧特性进一步研究的参考依据。

英文摘要：

Low-pressure, laminar, premixed flames of n-heptane/oxygen/argon and n-heptane/ ethanol/oxygen/argon were studied at an equivalence ratio of 1.0 to determine the effects of ethanol on n-heptane decomposition. The experiment was performed with tunable synchrotron vacuum ultraviolet （VUV） photoionization and molecular-beam mass spectrometry. With the addition of ethanol, the route of n-heptane decomposition to hexene was changed, and n-heptane decomposed more toward butene than toward pentene. 1,3-Cyclohexadiene, ethanol and butanol were formed in the flame of n-heptane/ethanol/oxygen/argon. The results are a useful database for testing detailed chemical kinetic mechanisms of heptane decomposition and ethanol oxidation.