Print Email Facebook Twitter Effect of vibrational modes on fluidization characteristics and solid distribution of cohesive micro- and nano-silica powders Title Effect of vibrational modes on fluidization characteristics and solid distribution of cohesive micro- and nano-silica powders Author Kamphorst, R. (TU Delft ChemE/Product and Process Engineering) Wu, K. (TU Delft ChemE/Product and Process Engineering) van Baarlen, M. (TU Delft Sanitary Engineering) Meesters, G.M.H. (TU Delft ChemE/Product and Process Engineering) van Ommen, J.R. (TU Delft ChemE/Product and Process Engineering) Date 2024 Abstract In this study, the impact of different vibrational modes on the fluidization characteristics of cohesive micro- and nano-silica powder was examined. Fractional pressure drop, bed expansion measurements, and X-ray imaging were utilized to characterize the fluidization quality. The densities of the emulsion phase at the top and bottom of the column were quantified and compared, providing insights into the solid distribution within the fluidized bed. In the absence of vibration, neither powder could be fluidized within the considered range of superficial gas velocities. Vertical vibration was found to initiate fluidization for both powders. In contrast, elliptical vibration failed to overcome the channelling behavior when fluidizing the micro-powder. For nano-powder, combined channelling and powder compaction occurred when the bed was subjected to elliptical vibration. For the micro-powder, it was observed that bed homogeneity was independent of vertical vibration intensity but improved with increasing superficial gas velocity. For nano-powder, intensifying vertical vibration led to segregation, likely due to agglomerate densification. Furthermore, fractional pressure drop measurements proved to be a strong tool in assessing fluidization quality, providing insights that could not be attained by conventional indicators. Subject AgglomerationAssistance methodsCohesive particlesNano-particlesVibro-fluidized bedX-ray imaging To reference this document use: http://resolver.tudelft.nl/uuid:64563d5b-e4ff-4e7b-b835-947b88063a72 DOI https://doi.org/10.1016/j.ces.2024.119911 ISSN 0009-2509 Source Chemical Engineering Science, 291 Part of collection Institutional Repository Document type journal article Rights © 2024 R. Kamphorst, K. Wu, M. van Baarlen, G.M.H. Meesters, J.R. van Ommen Files PDF 1-s2.0-S0009250924002112-main.pdf 2.28 MB Close viewer /islandora/object/uuid:64563d5b-e4ff-4e7b-b835-947b88063a72/datastream/OBJ/view