Polysiloxane coatings on microspheres based on Multiphase Flow with Interface Exchange-Discrete Element Modelling

Singh, Sanjay Kumar Devendhar; Dietiker, Jean-François; Lu, Kathy

doi:10.1016/j.partic.2021.12.003

Title: Polysiloxane coatings on microspheres based on Multiphase Flow with Interface Exchange-Discrete Element Modelling

Journal Article · 15 December 2021 · Particuology

DOI: https://doi.org/10.1016/j.partic.2021.12.003 · OSTI ID:1958814

^[1]; Dietiker, Jean-François ^[2];

^[1]

Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)

Polysiloxane coatings on yttria stabilized zirconia (YSZ) microspheres of 500 μm were simulated in a spout fluidized bed coater using Multiphase Flow with Interface Exchange-Discrete Element Modelling (MFiX-DEM). In this work, two different coater configurations were developed to study the influence of gas velocity and its distribution on particle dynamics. The presence of the Wurster tube not only enhances the distribution but also increases the overall residence time of the particles. Investigations were also carried out with different Wurster tube positions (normal, 10% and 20% lowered from its initial position). Among these, 20% lowered Wurster tube position demonstrated the most effective coating process. The effects of gas inlet pressure on the average gas velocity and the distribution of particles were analyzed. More than 97% of the particles can be retained. The derived results, including average gas velocity, particle retention percentage, and distribution of particles with gas velocity, are being used to guide the experimental work in obtaining defect-free coatings for YSZ microspheres.

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Research Organization:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE); USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: 89243318CFE000003; NE0008807

OSTI ID:: 1958814

Journal Information:: Particuology, Journal Name: Particuology Vol. 69; ISSN 1674-2001

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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