کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7841979 | 1506506 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Estimating density of ionic liquids under very high pressure
ترجمه فارسی عنوان
برآورد چگالی مایعات یونی تحت فشار بسیار بالا
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
مایع یونی، تراکم، فشار بالا، رامان،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
Equation of state according to the Carnahan-Starling-van der Waals model has been proposed for ionic liquids based on the anions tetrafluoborate, [BF4]â, hexafluorophosphate, [PF6]â, and bis(trifluoromethanesufonyl)imide, [NTf2]â, from available volumetric data within the MPa range of pressure. Then, the equation of state is used to estimate density in the GPa range of pressure. The hard sphere part of the equation considered a binary mixture of cation and anion spheres whose diameters exhibit a satisfactory degree of transferability among different systems with a common ion. It is shown that pressure induced vibrational frequency shift, âν, of the characteristic Raman band of the stretching mode of [BF4]â, [PF6]â, and [NTf2]â collapses into a master curve when âν is plotted as a function of reduced density for each group of ionic liquids. Thus, Raman spectroscopy provides a validation test of the high-pressure extrapolation of the equation of state for ionic liquids.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 265, 1 September 2018, Pages 510-516
Journal: Journal of Molecular Liquids - Volume 265, 1 September 2018, Pages 510-516
نویسندگان
Tatiana C. Penna, Vitor H. Paschoal, Luiz F.O. Faria, Mauro C.C. Ribeiro,