Investigation on structural fluctuation of supercritical cyclohexane by small-angle X-ray scattering

被引:6
作者
Arai, Asako Ayusawa [1 ]
Morita, Takeshi [1 ]
Nishikawa, Keiko [1 ]
机构
[1] Chiba Univ, Div Divers Sci, Grad Sch Sci & Technol, Inage Ku, Chiba 2638522, Japan
关键词
density fluctuation; correlation length; supercritical fluid; small-angle X-ray scattering; cyclohexane;
D O I
10.1016/j.fluid.2007.01.002
中图分类号
O414.1 [热力学];
学科分类号
摘要
Small-angle X-ray scattering (SAXS) study on supercritical cyclohexane was made to obtain density fluctuation and correlation length, which are quantitative expressions for structural fluctuation. The measurements were carried out along three isothermal conditions at the reduced temperatures of T-r =T/T-c = 1.02, 1.04 and 1.06. The SAXS measurements for supercritical benzene were also carried out as a reference to estimate absolute values of the density fluctuation for supercritical cyclohexane. The density fluctuation and the correlation length for cyclohexane were compared with those for CO2, CHF3, C2H4 and benzene, which were already reported, focusing on the differences of intermolecular interaction and the molecular size. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:114 / 118
页数:5
相关论文
共 21 条
[1]  
AMBROSE D, 1972, PROCESS TECHNOL INT, V17, P968
[2]   DESIGN OF A SMALL-ANGLE X-RAY DIFFRACTOMETER USING SYNCHROTRON RADIATION AT THE PHOTON-FACTORY [J].
AMEMIYA, Y ;
WAKABAYASHI, K ;
HAMANAKA, T ;
WAKABAYASHI, T ;
MATSUSHITA, T ;
HASHIZUME, H .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH, 1983, 208 (1-3) :471-477
[3]  
ANDREW ER, 1961, PHYS CHEM SOLIDS, V18, P9
[4]  
[Anonymous], 1962, NASA TECHNICAL REPOR
[5]   Analysis to obtain precise density fluctuation of supercritical fluids by small-angle X-ray scattering [J].
Arai, AA ;
Morita, T ;
Nishikawa, K .
CHEMICAL PHYSICS, 2005, 310 (1-3) :123-128
[6]   Investigation of structural fluctuation of supercritical benzene by small-angle x-ray scattering [J].
Arai, AA ;
Morita, T ;
Nishikawa, K .
JOURNAL OF CHEMICAL PHYSICS, 2003, 119 (03) :1502-1509
[7]   Construction of a sample cell of poisonous organic solvents in supercritical state for small-angle X-ray scattering measurements [J].
Ayusawa, A ;
Morita, T ;
Kusano, K ;
Miyagi, H ;
Shimokawa, Y ;
Matsuo, H ;
Nishikawa, K .
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2001, 40 (6A) :4260-4261
[8]  
Bochynski Z, 1999, ACTA PHYS SLOVACA, V49, P409
[9]   VAN DER WAALS VOLUMES + RADII [J].
BONDI, A .
JOURNAL OF PHYSICAL CHEMISTRY, 1964, 68 (03) :441-+
[10]  
BONSEN C, COMMUNICATION