MASS-TRANSFER AND HYDRAULIC CHARACTERISTICS IN SPRAY AND PACKED EXTRACTION COLUMNS FOR SUPERCRITICAL CARBON-DIOXIDE ETHANOL-WATER SYSTEM

被引：31

作者：

LIM, JS ^{[1
]}

LEE, YW ^{[1
]}

KIM, JD ^{[1
]}

LEE, YY ^{[1
]}

机构：

[1] KOREA UNIV, DEPT CHEM ENGN, SUNGBUK KU, SEOUL 136701, SOUTH KOREA

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 1995年 / 8卷 / 02期

关键词：

MASS-TRANSFER COEFFICIENTS; SUPERCRITICAL CARBON DIOXIDE; EXTRACTION; ETHANOL; COLUMN CONTACTOR;

D O I：

10.1016/0896-8446(95)90025-X

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：

Mass-transfer efficiencies and hydraulic characteristics of a 3.18-cm spray and a packed column for extracting ethanol from aqueous ethanol solution with supercritical carbon dioxide were investigated. Experiments were performed at 308.2, 313.2, and 323.2 K over a pressure range from 9.1 to 12.2 MPa. The influences of fluid properties, phase flow rates, column internals, and phase dispersion on mass-transfer efficiencies and hydraulic characteristics are discussed. An extension of a model for predicting mass-transfer efficiency in conventional liquid-liquid extraction to supercritical-fluid extraction was attempted. The model for mass-transfer efficiencies, developed for conventional spray and packed liquid-liquid extraction columns, was in good agreement with our experimental results.

引用

页码：127 / 137

页数：11

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