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摘要: 建立了一套低停留时间流动法测定物质临界性质的实验装置，样品在加热区停留10s~50s,有效的抑制了被测流体的热分解和热聚合反应。采用正戊烷、正己烷及环己烷为标准物对装置进行了可靠性校验，测定了RP-3和仿JP-7两种吸热燃料的临界温度和压力。同时选用了四种以体积平均沸点和相对密度为主要参数的估算方法，对燃料的临界性质进行了估算，比较了实验值与估算值的偏差,表明API(American Petroleum Institute) 方法 和 RiaziDaubert关联式相对较准确。Abstract: A short residence time flow equipment for the measurement of the critical temperature and pressure of fluids was developed to determine the critical properties of endothermic hydrocarbon fuels. The short residence time (about 10s~50s) at elevatedtemperature minimized the decomposition and other reactions of fuels. Taking n-pentane, n-hexane and cyclohexane as standard reagents, the reliability of the apparatus was checked. The critical properties of endothermic hydrocarbon fuelsSimulate JP-7 and RP-3 were determined. Four estimation methods based on the volume average boiling point and relative density were also used to estimate the critical properties of the fuels. The comparisons between the experimental and predicted values indicated that the correlations suggested by API (American Petroleum Institute) and RiaziDaubert were reliable to predict the critical properties of fuels.
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Key words:
- endothermic fuels /
- low residence time flow method /
- critical properties
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