SEPARATION OF ETHANOL FROM AQUEOUS-SOLUTIONS BY SUPERCRITICAL CARBON-DIOXIDE - COMPARISON BETWEEN SIMULATIONS AND EXPERIMENTS

被引：21

作者：

BERNAD, L ^{[1
]}

KELLER, A ^{[1
]}

BARTH, D ^{[1
]}

PERRUT, M ^{[1
]}

机构：

[1] SEPAREX,F-54250 CHAMPIGNEULLES,FRANCE

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 1993年 / 6卷 / 01期

关键词：

SUPERCRITICAL CARBON DIOXIDE; ETHANOL; EXTRACTION; SIMULATION; MASS TRANSFER COEFFICIENTS;

D O I：

10.1016/0896-8446(93)90004-H

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：

In order to evaluate the mass transfer coefficient between liquid and supercritical phases in counter-current flow, we have studied the extraction of ethanol from an aqueous solution by supercritical carbon dioxide, as the equilibrium data are relatively well known. Extensive mass transfer results at a pressure of 10 MPa and a temperature of 313 K are obtained in our pilot plant equipped with a 1.4 m high, 54 mm i.d. column packed with stainless steel BX 64 Sulzer packing. From these results, we calculate the extraction efficiency in terms of height equivalent to a theoretical stage (HETS: 0.5 to 1 m) and the overall mass transfer coefficient (k(G)a = 4 x 10(-3) to 12 x 10(-3) sec-1) on the basis of (1) a two-film mass transfer description, and (2) an equation-of-state derived from the Redlich-Kwong-Soave equation proposed by Schwartzenruber and Renon.1

引用

页码：9 / 14

页数：6

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