کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
216542 1426279 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The precise measurement of the (vapour + liquid) equilibrium properties for (CO2 + isobutane) binary mixtures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
The precise measurement of the (vapour + liquid) equilibrium properties for (CO2 + isobutane) binary mixtures
چکیده انگلیسی

Recently, it has been suggested that natural working fluids, such as CO2, hydrocarbons, and their mixtures, could provide a long-term alternative to fluorocarbon refrigerants. (Vapour + liquid) equilibrium (VLE) data for these fluids are essential for the development of equations of state, and for industrial process such as separation and refinement. However, there are large inconsistencies among the available literature data for (CO2 + isobutane) binary mixtures, and therefore provision of reliable and new measurements with expanded uncertainties is required. In this study, we determined precise VLE data using a new re-circulating type apparatus, which was mainly designed by Akico Co., Japan. An equilibrium cell with an inner volume of about 380 cm3 and two optical windows was used to observe the phase behaviour. The cell had re-circulating loops and expansion loops that were immersed in a thermostatted liquid bath and air bath, respectively. After establishment of a steady state in these loops, the compositions of the samples were measured by a gas chromatograph (GL Science, GC-3200). The VLE data were measured for CO2/propane and CO2/isobutane binary mixtures within the temperature range from 300 K to 330 K and at pressures up to 7 MPa. These data were compared with the available literature data and with values predicted by thermodynamic property models.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 43, Issue 3, March 2011, Pages 244–247
نویسندگان
, , ,