Comparison of Mass Transfer Coefficient Approach and Nernst鈥揚lanck Formulation in the Reactive Transport Modeling of Co, Ni, and Ag Removal by Mixed-Bed Ion-Exchange Resins

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• 作者：Martin Bachet ; Lo茂c Jauberty ; Laurent De Windt ; Etienne Tevissen ; Caroline de Dieuleveult ; H茅l猫ne Schneider
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：July 9, 2014
• 年：2014
• 卷：53
• 期：27
• 页码：11096-11106
• 全文大小：501K
• ISSN：1520-5045

文摘

Experiments performed under chemical and flow conditions representative of pressurized water reactors (PWR) primary fluid purification by ion exchange resins (Amberlite IRN9882) are modeled with the OPTIPUR code, considering 1D reactive transport in the mixed-bed column with convective/dispersive transport between beads and electrodiffusive transport within the boundary film around the beads. The effectiveness of the purification in these dilute conditions is highly related to film mass transfer restrictions, which are accounted for by adjustment of a common mass transfer coefficient (MTC) on the experimental initial leakage or modeling of species diffusion through the bead film by the Nernst鈥揚lanck equation. A detailed analysis of the modeling against experimental data shows that the Nernst鈥揚lanck approach with no adjustable parameters performs as well as, or better than, the MTC approach, particularly to simulate the chromatographic elution of silver by nickel and the subsequent enrichment of the solution in the former metal.