Hydrodynamics and mass transfer in a rotating disk supercritical extraction column

Antero Laitinen (Corresponding Author), Juha Kaunisto

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

A novel rotating disk column (RDC) designed for high-pressure extraction was tested by extracting ethanol from aqueous solutions using supercritical carbon dioxide at 10 MPa and 313 K as a solvent.
Mass-transfer efficiencies and hydraulic characteristics were measured as functions of a specific power input group (N3R5H-1D-2) and solvent-to-feed ratio. Agitation generally increased the value of the overall mass-transfer coefficient (Koda) and decreased the value of the height equivalent to a theoretical stage (HETS). The Koda values ranged from 0.006 to 0.015 s-1, and the HETS values ranged from 0.37 to 0.8 m.
The dispersed-phase drop size decreased with the agitator rotor speed. The measured values were between 1.3 and 1.8 mm. Agitation and increasing solvent flow rate increased the dispersed-phase holdup from 0.04 to 0.2. The measured slip velocities ranged from 0.08 to 0.14 m s-1.
The highest total throughput of the RDC column was approximately 74 m3 h-1 m-2.
Original languageEnglish
Pages (from-to)2529-2534
JournalIndustrial & Engineering Chemistry Research
Volume37
Issue number6
DOIs
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed

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Rotating disks
Mass transfer
Hydrodynamics
Carbon Dioxide
Carbon dioxide
Ethanol
Rotors
Flow rate
Throughput
Hydraulics

Cite this

@article{4df733ceffd8444f9d222cdad8611739,
title = "Hydrodynamics and mass transfer in a rotating disk supercritical extraction column",
abstract = "A novel rotating disk column (RDC) designed for high-pressure extraction was tested by extracting ethanol from aqueous solutions using supercritical carbon dioxide at 10 MPa and 313 K as a solvent. Mass-transfer efficiencies and hydraulic characteristics were measured as functions of a specific power input group (N3R5H-1D-2) and solvent-to-feed ratio. Agitation generally increased the value of the overall mass-transfer coefficient (Koda) and decreased the value of the height equivalent to a theoretical stage (HETS). The Koda values ranged from 0.006 to 0.015 s-1, and the HETS values ranged from 0.37 to 0.8 m. The dispersed-phase drop size decreased with the agitator rotor speed. The measured values were between 1.3 and 1.8 mm. Agitation and increasing solvent flow rate increased the dispersed-phase holdup from 0.04 to 0.2. The measured slip velocities ranged from 0.08 to 0.14 m s-1. The highest total throughput of the RDC column was approximately 74 m3 h-1 m-2.",
author = "Antero Laitinen and Juha Kaunisto",
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doi = "10.1021/ie970658u",
language = "English",
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journal = "Industrial & Engineering Chemistry Research",
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Hydrodynamics and mass transfer in a rotating disk supercritical extraction column. / Laitinen, Antero (Corresponding Author); Kaunisto, Juha.

In: Industrial & Engineering Chemistry Research, Vol. 37, No. 6, 1998, p. 2529-2534.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Hydrodynamics and mass transfer in a rotating disk supercritical extraction column

AU - Laitinen, Antero

AU - Kaunisto, Juha

PY - 1998

Y1 - 1998

N2 - A novel rotating disk column (RDC) designed for high-pressure extraction was tested by extracting ethanol from aqueous solutions using supercritical carbon dioxide at 10 MPa and 313 K as a solvent. Mass-transfer efficiencies and hydraulic characteristics were measured as functions of a specific power input group (N3R5H-1D-2) and solvent-to-feed ratio. Agitation generally increased the value of the overall mass-transfer coefficient (Koda) and decreased the value of the height equivalent to a theoretical stage (HETS). The Koda values ranged from 0.006 to 0.015 s-1, and the HETS values ranged from 0.37 to 0.8 m. The dispersed-phase drop size decreased with the agitator rotor speed. The measured values were between 1.3 and 1.8 mm. Agitation and increasing solvent flow rate increased the dispersed-phase holdup from 0.04 to 0.2. The measured slip velocities ranged from 0.08 to 0.14 m s-1. The highest total throughput of the RDC column was approximately 74 m3 h-1 m-2.

AB - A novel rotating disk column (RDC) designed for high-pressure extraction was tested by extracting ethanol from aqueous solutions using supercritical carbon dioxide at 10 MPa and 313 K as a solvent. Mass-transfer efficiencies and hydraulic characteristics were measured as functions of a specific power input group (N3R5H-1D-2) and solvent-to-feed ratio. Agitation generally increased the value of the overall mass-transfer coefficient (Koda) and decreased the value of the height equivalent to a theoretical stage (HETS). The Koda values ranged from 0.006 to 0.015 s-1, and the HETS values ranged from 0.37 to 0.8 m. The dispersed-phase drop size decreased with the agitator rotor speed. The measured values were between 1.3 and 1.8 mm. Agitation and increasing solvent flow rate increased the dispersed-phase holdup from 0.04 to 0.2. The measured slip velocities ranged from 0.08 to 0.14 m s-1. The highest total throughput of the RDC column was approximately 74 m3 h-1 m-2.

U2 - 10.1021/ie970658u

DO - 10.1021/ie970658u

M3 - Article

VL - 37

SP - 2529

EP - 2534

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

SN - 0888-5885

IS - 6

ER -