کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5413184 | 1506618 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural investigation on supercritical carbon dioxide and its mixture with alcohol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Small-angle neutron scattering (SANS) experiments were carried out for three different systems, pure CO2, CO2 + methanol (1 mol%) and CO2 + ethanol (1 mol%), along the isotherm of 311.15 K in their supercritical states. All the SANS profiles were well analyzed with Ornstein-Zernike equation. With addition of the alcohols, the maximum values of the correlation length, ξ, and the scattering intensity at Q = 0, I(0), became larger, and the pressure at which ξ and I(0) became maxima was shifted to be lower. These changes can be explained qualitatively with van der Waals equation of state by regarding CO2 + alcohol mixture as a system consisting of a single kind of virtual molecules. From this analysis, both the molecular attractive interaction and volume are suggested to be increased in the mixture. These changes were considered to be strongly connected with the increase of solubility and selectivity on entrainer effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 147, Issues 1â2, 20 July 2009, Pages 102-106
Journal: Journal of Molecular Liquids - Volume 147, Issues 1â2, 20 July 2009, Pages 102-106
نویسندگان
Takashi Sato, Masaaki Sugiyama, Masakatsu Misawa, Kei Hamada, Keiji Itoh, Kazuhiro Mori, Toshiharu Fukunaga,