Develpoment of a Simple Method for Prediction of Vapor Pressure and Flash Point of Gasoline by Gas Chromatography and Its Application to Evaporated Gasoline

YOSHIDA Hiroaki, OKAMOTO Katsuhiro, HINO Tomonori, HIRAMATSU Muneyuki, MIYAMOTO Hiroki, HONMA Masakatsu, WATANABE Norimichi, HAGIMOTO Yasuaki

doi:10.2116/bunsekikagaku.61.569

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Other Title

ガスクロマトグラフィーによるガソリンの蒸気圧及び引火点の簡便な予測法の開発と蒸発ガソリンの分析への適用
ガスクロマトグラフィーニヨルガソリンノジョウキアツオヨビインカテンノカンベンナヨソクホウノカイハツトジョウハツガソリンノブンセキエノテキヨウ
Development of a simple method for prediction of vapor pressure and flash Point of gasoline by gas chromatography and its application to evaporated gasoline

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Description

The vapor pressure and flash point of motor gasoline were determined using gas chromatography (GC). The contents of 24 major hydrocarbon components of gasoline and ethyl t-butyl ether (ETBE) were measured by GC. The saturated vapor pressure of each component was calculated using Antoine’s equation. The vapor pressure of gasoline was found to be calculated as the sum of the product of the content value and the saturated vapor pressure of each of the 25 components. The calculated vapor pressures of regular gasoline and bio-gasoline (regular gasoline containing bio-ETBE) were in good accordance with vapor pressures measured by Reid method, which is established in Japanese Industrial Standards (JIS). The vapor pressure of 0–50 wt% evaporated gasoline in the 10–40°C temperature range was calculated in the same way. The calculated vapor pressures of evaporated gasoline also agreed well with values obtained by Reid method. The flash point of 0–50 wt% evaporated gasoline was calculated by Le Chatelier’s law using the content value measured by GC. The calculated flash points were found to be about the same as the measured values by Tag closed cup method, the official method in JIS. The method is effective for assessing the flammability of gasoline used in arson cases because GC is widely available, and requires a smaller amount of the sample compared to the conventional methods in JIS.

Journal

BUNSEKI KAGAKU

BUNSEKI KAGAKU 61 (7), 569-576, 2012

The Japan Society for Analytical Chemistry

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