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- Title
Evaluation of tertiary pyridine resin for the separation of lanthanides by simulated moving-bed chromatography.
- Authors
Sreedhar, Balamurali; Suzuki, Tatsuya; Hobbs, David T.; Kawajiri, Yoshiaki
- Abstract
Lanthanide separation by simulated moving-bed chromatography was studied as a model system for separating lanthanide fission products and minor actinides from used nuclear fuels. The simulated moving-bed system was modeled for a tertiary pyridine anion-exchange resin supported on silica particles as the stationary phase and a mixture of methanol and 1M nitric acid as the mobile phase. Pulse injection tests using a single packed column were used to obtain chromatographic parameters for mathematical modeling of the simulated moving-bed system. Higher concentrations of methanol improved the separation, but the chromatograms showed evidence of nonlinearity of the isotherms. The mathematical model of the simulated moving-bed process predicted a production rate of purified samarium and neodymium at 118 g solute/L resin/day and a purity of 99.5%. The optimal methanol ratio for the production rate for various product purities was determined from the model. The excellent separation of Nd and Sm suggests that the simulated moving-bed system could be applied to the separation of minor actinides such as americium and curium.
- Subjects
RARE earth metals; CHROMATOGRAPHIC analysis; FISSION products; ACTINIDE elements; NUCLEAR fuels
- Publication
Journal of Separation Science, 2014, Vol 37, Issue 20, p2892
- ISSN
1615-9306
- Publication type
Article
- DOI
10.1002/jssc.201400516