DIFFUSION-COEFFICIENTS OF LONG-CHAIN ESTERS IN SUPERCRITICAL CARBON-DIOXIDE

被引：55

作者：

LIONG, KK ^{[1
]}

WELLS, PA ^{[1
]}

FOSTER, NR ^{[1
]}

机构：

[1] UNIV NEW S WALES,SCH CHEM ENGN & IND CHEM,POB 1,KENSINGTON,NSW 2033,AUSTRALIA

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1991年 / 30卷 / 06期

关键词：

D O I：

10.1021/ie00054a039

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Binary diffusion coefficients, D12, of C18:0, C22:0, and C22:6 ethyl esters and C20:5 and C22:6 methyl esters were measured in supercritical carbon dioxide in the temperature range 308-318 K and at pressures between 96.7 and 210.5 bar. Measurements were obtained using a capillary peak broadening technique. The experimentally determined diffusion coefficients were approximately 1 x 10(-4) cm2/s at 313 K and 97 bar, decreasing to approximately 0.5 x 10(-4) cm2/s with an isothermal rise in pressure to 210 bar. The applicability of several correlations to the experimental diffusivity data was examined. In particular, the free-volume-type diffusion model was found to correlate the experimental data to within +/- 3%.

引用

页码：1329 / 1335

页数：7

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