Local excess density about substituted benzene compounds in supercritical CO2 based on FT-IR spectroscopy

被引：38

作者：

Wada, N ^{[1
]}

Saito, M ^{[1
]}

Kitada, D ^{[1
]}

Smith, RL ^{[1
]}

Inomata, H ^{[1
]}

Arai, K ^{[1
]}

Saito, S ^{[1
]}

机构：

[1] TOHOKU UNIV,RES CTR SUPERCRIT FLUID TECHNOL,DEPT CHEM ENGN,SENDAI,MIYAGI 980779,JAPAN

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1997年 / 101卷 / 50期

关键词：

D O I：

10.1021/jp972309j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

IR spectra of substituted benzene compounds were measured in supercritical CO2 with an apparatus capable of in situ measurement. An experimental procedure was developed which provided reliable data and allowed quantitative analyses. The molar absorption coefficient of substituent deformation stretch and C-C ring stretch were found to vary with the system density but their density dependence was different. A method for determining the local excess density of benzene derivatives in supercritical CO2 is proposed. The expression obtained for the local excess density can be represented by a single function in terms of bulk density and exhibits a maximum just below the critical density.

引用

页码：10918 / 10922

页数：5

共 16 条

[1]

BARROW GM, 1982, INTRO MOL SPECTROSCO

[2] SPECTROSCOPIC DETERMINATION OF SOLUTE FLUID CLUSTER SIZE IN SUPERCRITICAL N2O [J].

BETTS, TA ;

ZAGROBELNY, J ;

BRIGHT, FV .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (21) :8163-8171

[3] PHASE-EQUILIBRIA FOR SUPERCRITICAL FLUID PROCESS DESIGN [J].

BRENNECKE, JF ;

ECKERT, CA .

AICHE JOURNAL, 1989, 35 (09) :1409-1427

[4] CLUSTERING IN DILUTE, BINARY SUPERCRITICAL MIXTURES - A FLUCTUATION ANALYSIS [J].

DEBENEDETTI, PG .

CHEMICAL ENGINEERING SCIENCE, 1987, 42 (09) :2203-2212

[5] SOLUTE PARTIAL MOLAL VOLUMES IN SUPERCRITICAL FLUIDS [J].

ECKERT, CA ;

ZIGER, DH ;

JOHNSTON, KP ;

KIM, S .

JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (12) :2738-2746

[6] THE USE OF PARTIAL MOLAL VOLUME DATA TO EVALUATE EQUATIONS OF STATE FOR SUPERCRITICAL FLUID MIXTURES [J].

ECKERT, CA ;

ZIGER, DH ;

JOHNSTON, KP ;

ELLISON, TK .

FLUID PHASE EQUILIBRIA, 1983, 14 (OCT) :167-175

[7] DENSITY-DEPENDENCE OF THE MOLAR ABSORPTION-COEFFICIENT - APPLICATION OF THE BEER-LAMBERT LAW TO SUPERCRITICAL CO2-NAPHTHALENE MIXTURE [J].

INOMATA, H ;

YAGI, Y ;

SAITO, M ;

SAITO, S .

JOURNAL OF SUPERCRITICAL FLUIDS, 1993, 6 (04) :237-240

[8] CHARGE-TRANSFER-STATE FORMATION IN SUPERCRITICAL FLUID - (N,N-DIMETHYLAMINO)BENZONITRILE IN CF3H [J].

KAJIMOTO, O ;

FUTAKAMI, M ;

KOBAYASHI, T ;

YAMASAKI, K .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (05) :1347-1352

[9] MOLECULAR-INTERACTIONS IN DILUTE SUPERCRITICAL FLUID SOLUTIONS [J].

KIM, S ;

JOHNSTON, KP .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1987, 26 (06) :1206-1213

[10] MOLECULAR-DYNAMICS STUDY ON SOLVENT CLUSTERING IN SUPERCRITICAL-FLUID SOLUTIONS BASED ON PARTICLE RADIAL KINETIC-ENERGY [J].

LIEW, CC ;

INOMATA, H ;

SAITO, S .

FLUID PHASE EQUILIBRIA, 1995, 104 :317-329

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