کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
216638 1426276 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of the vapor pressure of ethyl esters by Differential Scanning Calorimetry
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Determination of the vapor pressure of ethyl esters by Differential Scanning Calorimetry
چکیده انگلیسی

Differential Scanning Calorimetry (d.s.c.) was used to determine the vapor pressure of the following ethyl esters: ethyl laurate, ethyl myristate, ethyl palmitate, ethyl stearate, ethyl oleate and ethyl linoleate in the range from 1.33 to 9.33 kPa. These esters are the major constituents of the biodiesel obtained from the transesterification of some vegetable oils with ethanol. Samples of 2 to 5 mg were used in the analysis, with a heating rate of 25 °C · min−1 and a pinhole with a diameter of 0.25 mm. The results showed that Differential Scanning Calorimetry was a suitable technique for measuring the vapor pressure of organic compounds like fatty esters. The constants of the Antoine equation were determined from the experimental data and the validity of this equation in representing the vapor pressure and vaporization enthalpy of the compounds under study was examined.

Research highlights
► Vapor pressure of ethyl esters.
► Measurements of vapor pressure by Differential Scanning Calorimetry.
► Antoine equation constants for ethyl esters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 43, Issue 6, June 2011, Pages 943–947
نویسندگان
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