Factors influencing separation selectivity of rare earth elements in flat sheet supported liquid membranes

J. Martínez; R. Rodríguez Varela; K. Forsberg; Rasmuson

doi:10.1016/j.ces.2018.06.018

Factors influencing separation selectivity of rare earth elements in flat sheet supported liquid membranes

J. Martínez, R. Rodríguez Varela, K. Forsberg, Rasmuson

KTH Royal Institute of Technology

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

Abstract

Separation selectivity of the mixture yttrium-neodymium-dysprosium using bis (2-ethylhexyl) hydrogen phosphate (D2EHPA) as extractant in a flat sheet supported liquid membrane was studied by simulations. A new definition of selectivity and a diffusional-kinetic transient model were used in the calculations. Resistance distribution between the phases, stripping phase pH, extractant concentration and initial feed concentration have great influence on selectivity and process time and their appropriate management would improve separation. The analysis of selectivity using the present model would be a useful tool to design a multistage process aimed at the separation of a multicomponent mixture of rare earth elements into its constituents.

Original language	English
Pages (from-to)	134-155
Number of pages	22
Journal	Chemical Engineering Science
Volume	191
DOIs	https://doi.org/10.1016/j.ces.2018.06.018
Publication status	Published - 14 Dec 2018
Externally published	Yes

Keywords

Extraction
Lanthanide
Modeling
Selectivity
Separation
Supported liquid membrane extraction

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10.1016/j.ces.2018.06.018

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title = "Factors influencing separation selectivity of rare earth elements in flat sheet supported liquid membranes",

abstract = "Separation selectivity of the mixture yttrium-neodymium-dysprosium using bis (2-ethylhexyl) hydrogen phosphate (D2EHPA) as extractant in a flat sheet supported liquid membrane was studied by simulations. A new definition of selectivity and a diffusional-kinetic transient model were used in the calculations. Resistance distribution between the phases, stripping phase pH, extractant concentration and initial feed concentration have great influence on selectivity and process time and their appropriate management would improve separation. The analysis of selectivity using the present model would be a useful tool to design a multistage process aimed at the separation of a multicomponent mixture of rare earth elements into its constituents.",

keywords = "Extraction, Lanthanide, Modeling, Selectivity, Separation, Supported liquid membrane extraction",

author = "J. Mart{\'i}nez and {Rodr{\'i}guez Varela}, R. and K. Forsberg and Rasmuson",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

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doi = "10.1016/j.ces.2018.06.018",

language = "English",

volume = "191",

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journal = "Chemical Engineering Science",

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T1 - Factors influencing separation selectivity of rare earth elements in flat sheet supported liquid membranes

AU - Martínez, J.

AU - Rodríguez Varela, R.

AU - Forsberg, K.

AU - Rasmuson,

PY - 2018/12/14

Y1 - 2018/12/14

N2 - Separation selectivity of the mixture yttrium-neodymium-dysprosium using bis (2-ethylhexyl) hydrogen phosphate (D2EHPA) as extractant in a flat sheet supported liquid membrane was studied by simulations. A new definition of selectivity and a diffusional-kinetic transient model were used in the calculations. Resistance distribution between the phases, stripping phase pH, extractant concentration and initial feed concentration have great influence on selectivity and process time and their appropriate management would improve separation. The analysis of selectivity using the present model would be a useful tool to design a multistage process aimed at the separation of a multicomponent mixture of rare earth elements into its constituents.

AB - Separation selectivity of the mixture yttrium-neodymium-dysprosium using bis (2-ethylhexyl) hydrogen phosphate (D2EHPA) as extractant in a flat sheet supported liquid membrane was studied by simulations. A new definition of selectivity and a diffusional-kinetic transient model were used in the calculations. Resistance distribution between the phases, stripping phase pH, extractant concentration and initial feed concentration have great influence on selectivity and process time and their appropriate management would improve separation. The analysis of selectivity using the present model would be a useful tool to design a multistage process aimed at the separation of a multicomponent mixture of rare earth elements into its constituents.

KW - Extraction

KW - Lanthanide

KW - Modeling

KW - Selectivity

KW - Separation

KW - Supported liquid membrane extraction

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U2 - 10.1016/j.ces.2018.06.018

DO - 10.1016/j.ces.2018.06.018

M3 - Article

AN - SCOPUS:85049097105

SN - 0009-2509

VL - 191

SP - 134

EP - 155

JO - Chemical Engineering Science

JF - Chemical Engineering Science

ER -

Factors influencing separation selectivity of rare earth elements in flat sheet supported liquid membranes

Abstract

Keywords

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