Eutectic freeze crystallization in a new apparatus: The cooled disk column crystallizer

Frank van der Ham; Marcelo Martins Seckler; Geert Jan Witkamp

doi:10.1016/S0255-2701(03)00018-7

Eutectic freeze crystallization in a new apparatus: The cooled disk column crystallizer

Frank van der Ham, Marcelo Martins Seckler, Geert Jan Witkamp^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

Eutectic freeze crystallization (EFC) is a technique for simultaneous crystallization of ice and salt that is energetically more efficient than conventional evaporative crystallization. In this paper, a new type of crystallizer is introduced for simultaneously conducting EFC and separating the ice from the salt crystals, the cooled disk column crystallizer (CDCC). Crystallization is achieved by indirect cooling with wiped disks and separation by means of gravity. The liquid feed stream enters the column at the center, ice leaves the column at the top and salt is discharged at the bottom. The heat flux from bulk fluid to disk in a 14 l CDCC using CuSO₄-water as a model system (eutectic temperature -1.6 °C) was 1.9 kW m^-2 for a temperature difference between disk and bulk of 4.5 K. The CuSO₄ · 5H₂O crystals formed were well faceted with an average size of 200 μm. Ice crystals were disk shaped with an average size 150 μm. Both ice and salt crystals were easily filtered. The impurity level in the ice crystals was below 100 ppm Cu.

Original language	English (US)
Pages (from-to)	161-167
Number of pages	7
Journal	Chemical Engineering and Processing: Process Intensification
Volume	43
Issue number	2
DOIs	https://doi.org/10.1016/S0255-2701(03)00018-7
State	Published - Feb 2004
Externally published	Yes

Bibliographical note

Funding Information:
The authors wish to thank NOVEM-The Netherlands Agency for Energy as well as the Ministry of Economic Affairs, the Ministry of Housing, Spatial Planning and Environment and the Ministry of Education and Science of the Netherlands through the EET program for their financial support.

Keywords

Cooled disk column crystallizer
Copper sulfate pentahydrate
Eutectic freeze crystallization
Ice

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Energy Engineering and Power Technology
Industrial and Manufacturing Engineering

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10.1016/S0255-2701(03)00018-7

Cite this

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title = "Eutectic freeze crystallization in a new apparatus: The cooled disk column crystallizer",

abstract = "Eutectic freeze crystallization (EFC) is a technique for simultaneous crystallization of ice and salt that is energetically more efficient than conventional evaporative crystallization. In this paper, a new type of crystallizer is introduced for simultaneously conducting EFC and separating the ice from the salt crystals, the cooled disk column crystallizer (CDCC). Crystallization is achieved by indirect cooling with wiped disks and separation by means of gravity. The liquid feed stream enters the column at the center, ice leaves the column at the top and salt is discharged at the bottom. The heat flux from bulk fluid to disk in a 14 l CDCC using CuSO4-water as a model system (eutectic temperature -1.6 °C) was 1.9 kW m-2 for a temperature difference between disk and bulk of 4.5 K. The CuSO4 · 5H2O crystals formed were well faceted with an average size of 200 μm. Ice crystals were disk shaped with an average size 150 μm. Both ice and salt crystals were easily filtered. The impurity level in the ice crystals was below 100 ppm Cu.",

keywords = "Cooled disk column crystallizer, Copper sulfate pentahydrate, Eutectic freeze crystallization, Ice",

author = "{van der Ham}, Frank and Seckler, {Marcelo Martins} and Witkamp, {Geert Jan}",

note = "Funding Information: The authors wish to thank NOVEM-The Netherlands Agency for Energy as well as the Ministry of Economic Affairs, the Ministry of Housing, Spatial Planning and Environment and the Ministry of Education and Science of the Netherlands through the EET program for their financial support.",

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doi = "10.1016/S0255-2701(03)00018-7",

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AU - Seckler, Marcelo Martins

AU - Witkamp, Geert Jan

N1 - Funding Information: The authors wish to thank NOVEM-The Netherlands Agency for Energy as well as the Ministry of Economic Affairs, the Ministry of Housing, Spatial Planning and Environment and the Ministry of Education and Science of the Netherlands through the EET program for their financial support.

PY - 2004/2

Y1 - 2004/2

N2 - Eutectic freeze crystallization (EFC) is a technique for simultaneous crystallization of ice and salt that is energetically more efficient than conventional evaporative crystallization. In this paper, a new type of crystallizer is introduced for simultaneously conducting EFC and separating the ice from the salt crystals, the cooled disk column crystallizer (CDCC). Crystallization is achieved by indirect cooling with wiped disks and separation by means of gravity. The liquid feed stream enters the column at the center, ice leaves the column at the top and salt is discharged at the bottom. The heat flux from bulk fluid to disk in a 14 l CDCC using CuSO4-water as a model system (eutectic temperature -1.6 °C) was 1.9 kW m-2 for a temperature difference between disk and bulk of 4.5 K. The CuSO4 · 5H2O crystals formed were well faceted with an average size of 200 μm. Ice crystals were disk shaped with an average size 150 μm. Both ice and salt crystals were easily filtered. The impurity level in the ice crystals was below 100 ppm Cu.

AB - Eutectic freeze crystallization (EFC) is a technique for simultaneous crystallization of ice and salt that is energetically more efficient than conventional evaporative crystallization. In this paper, a new type of crystallizer is introduced for simultaneously conducting EFC and separating the ice from the salt crystals, the cooled disk column crystallizer (CDCC). Crystallization is achieved by indirect cooling with wiped disks and separation by means of gravity. The liquid feed stream enters the column at the center, ice leaves the column at the top and salt is discharged at the bottom. The heat flux from bulk fluid to disk in a 14 l CDCC using CuSO4-water as a model system (eutectic temperature -1.6 °C) was 1.9 kW m-2 for a temperature difference between disk and bulk of 4.5 K. The CuSO4 · 5H2O crystals formed were well faceted with an average size of 200 μm. Ice crystals were disk shaped with an average size 150 μm. Both ice and salt crystals were easily filtered. The impurity level in the ice crystals was below 100 ppm Cu.

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Eutectic freeze crystallization in a new apparatus: The cooled disk column crystallizer

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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