Production of 75–150 µm and &lt;75 µm of cerium dioxide microspheres in high yield and throughput using the internal gelation process

Hunt, Rodney D.; Collins, Jack L.; Johnson, Jared A.; Cowell, Brian S.

doi:10.1016/j.anucene.2017.03.010

Production of 75–150 µm and <75 µm of cerium dioxide microspheres in high yield and throughput using the internal gelation process

Journal Article · Fri Mar 17 04:00:00 EDT 2017 · Annals of Nuclear Energy (Oxford)

DOI:https://doi.org/10.1016/j.anucene.2017.03.010· OSTI ID:1408635

Hunt, Rodney D. ^[1]; Collins, Jack L. ^[1]; Johnson, Jared A. ^[1]; Cowell, Brian S. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Hundreds of grams of calcined cerium dioxide (CeO₂) microspheres were produced in this paper using the internal gelation process with a focus on 75–150 µm and <75 µm diameter sizes. To achieve these small sizes, a modified internal gelation system was employed, which utilized a two-fluid nozzle, two static mixers for turbulent flow, and 2-ethyl-1-hexanol as the medium for gel formation at 333–338 K. This effort generated over 400 g of 75–150 µm and 300 g of <75 µm CeO₂ microspheres. The typical product yields for the 75–150 µm and <75 µm microspheres that were collected and processed were 72 and 99%, respectively, with a typical throughput of 66–73 g of CeO₂ microspheres per test, which could generate a maximum of 78.6 g of CeO₂. The higher yield of very small cerium spheres led to challenges and modifications, which are discussed in detail. Finally, as expected, when the <75 µm microspheres were targeted, losses to the system increased significantly.

Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1408635

Alternate ID(s):: OSTI ID: 22638397
OSTI ID: 1397015

Journal Information:: Annals of Nuclear Energy (Oxford), Journal Name: Annals of Nuclear Energy (Oxford) Vol. 105; ISSN 0306-4549

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (7)

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Cited By (4)

Production of monodisperse cerium oxide microspheres with diameters near 100 µm by internal-gelation sol–gel methods Katalenich, Jeffrey A.; Kitchen, Brian B.; Pierson, Bruce D. Journal of Sol-Gel Science and Technology, Vol. 86, Issue 2 https://doi.org/10.1007/s10971-018-4641-y	journal	April 2018
Preparation of cerium dioxide microspheres by internal gelation with cerium citrate as precursor Ding, Xueqiang; Ma, Jingtao; Zhou, Xiangwen Journal of Sol-Gel Science and Technology, Vol. 90, Issue 2 https://doi.org/10.1007/s10971-019-04965-w	journal	March 2019
Fabrication of CeO2–Nd2O3 microspheres by internal gelation process using M(OH)m and [MCit∙xH2O] (M=Ce3+, Ce4+, and Nd3+) as precursors Ding, Xueqiang; Ma, Jingtao; Zhou, Xiangwen Journal of Sol-Gel Science and Technology, Vol. 92, Issue 1 https://doi.org/10.1007/s10971-019-05058-4	journal	July 2019
Impurity levels in cerium oxide microspheres prepared by internal gelation sol–gel methods Katalenich, Jeffrey A. Journal of Sol-Gel Science and Technology, Vol. 94, Issue 3 https://doi.org/10.1007/s10971-019-05165-2	journal	November 2019

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
cerium oxide spheres
internal gelation

Production of 75–150 µm and <75 µm of cerium dioxide microspheres in high yield and throughput using the internal gelation process

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