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Multi-Objective Optimization of Chromatographic Rare Earth Element Separation

Knutson, Hans-Kristian LU ; Holmqvist, Anders LU and Nilsson, Bernt LU (2015) In Journal of Chromatography A 1416. p.57-63
Abstract
The importance of rare earth elements in modern technological industry grows, and as a result the interest for developing separation processes increases. This work is a part of developing chromatography as a rare earth element processing method. Process optimization is an important step in process development, and there are several competing objectives that need to be considered in a chromatographic separation process. Most studies are limited to evaluating the two competing objectives productivity and yield, and studies of scenarios with tri-objective optimizations are scarce. Tri-objective optimizations are much needed when evaluating the chromatographic separation of rare earth elements due to the importance of product pool... (More)
The importance of rare earth elements in modern technological industry grows, and as a result the interest for developing separation processes increases. This work is a part of developing chromatography as a rare earth element processing method. Process optimization is an important step in process development, and there are several competing objectives that need to be considered in a chromatographic separation process. Most studies are limited to evaluating the two competing objectives productivity and yield, and studies of scenarios with tri-objective optimizations are scarce. Tri-objective optimizations are much needed when evaluating the chromatographic separation of rare earth elements due to the importance of product pool concentration along with productivity and yield as process objectives. In this work, a multi-objective optimization strategy considering productivity, yield and pool concentration is proposed. This was carried out in the frame of a model based optimization study on a batch chromatography separation of the rare earth elements samarium, europium and gadolinium. The findings from the multi-objective optimization were used to provide with a general strategy for achieving desirable operation points, resulting in a productivity ranging between 0.61 and 0.75 kg Eu/(m3 column h) and a pool concentration between 0.52 and 0.79 kg Eu/m3, while maintaining a purity above 99% and never falling below an 80% yield for the main target component europium. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Rare earth elements, Chromatography, Multi-objective optimization, Pareto optimal surface, Parameter estimation
in
Journal of Chromatography A
volume
1416
pages
57 - 63
publisher
Elsevier
external identifiers
  • pmid:26375205
  • wos:000362304800007
  • scopus:84942190824
ISSN
0021-9673
DOI
10.1016/j.chroma.2015.09.010
language
English
LU publication?
yes
id
8ea5c4cd-f62a-4b29-b338-0789ee455616 (old id 7992153)
date added to LUP
2015-09-25 12:46:17
date last changed
2017-07-30 03:00:56
@article{8ea5c4cd-f62a-4b29-b338-0789ee455616,
  abstract     = {The importance of rare earth elements in modern technological industry grows, and as a result the interest for developing separation processes increases. This work is a part of developing chromatography as a rare earth element processing method. Process optimization is an important step in process development, and there are several competing objectives that need to be considered in a chromatographic separation process. Most studies are limited to evaluating the two competing objectives productivity and yield, and studies of scenarios with tri-objective optimizations are scarce. Tri-objective optimizations are much needed when evaluating the chromatographic separation of rare earth elements due to the importance of product pool concentration along with productivity and yield as process objectives. In this work, a multi-objective optimization strategy considering productivity, yield and pool concentration is proposed. This was carried out in the frame of a model based optimization study on a batch chromatography separation of the rare earth elements samarium, europium and gadolinium. The findings from the multi-objective optimization were used to provide with a general strategy for achieving desirable operation points, resulting in a productivity ranging between 0.61 and 0.75 kg Eu/(m3 column h) and a pool concentration between 0.52 and 0.79 kg Eu/m3, while maintaining a purity above 99% and never falling below an 80% yield for the main target component europium.},
  author       = {Knutson, Hans-Kristian and Holmqvist, Anders and Nilsson, Bernt},
  issn         = {0021-9673},
  keyword      = {Rare earth elements,Chromatography,Multi-objective optimization,Pareto optimal surface,Parameter estimation},
  language     = {eng},
  pages        = {57--63},
  publisher    = {Elsevier},
  series       = {Journal of Chromatography A},
  title        = {Multi-Objective Optimization of Chromatographic Rare Earth Element Separation},
  url          = {http://dx.doi.org/10.1016/j.chroma.2015.09.010},
  volume       = {1416},
  year         = {2015},
}