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- W2792404054 abstract "The fluidization of millimeter-sized media to mitigate the membrane fouling by micron-sized particles has received increasing attention, but a question that remained unanswered is the effect of the sphericity of the fluidized media on the energy-efficiency of fouling mitigation, which motivated the current study. Four millimeter-sized fluidized media types, of which three had similar equivalent volume diameters, were investigated, with micron-sized polystyrene particles serving as the particulate foulant. The direct observation through the membrane (DOTM) technique was used to determine the local critical flux, while a high-speed video camera was used to capture the local fluidization hydrodynamics (namely, particle velocity, particle rotation velocity, particle contact area and particle momentum). The results indicate that (i) although smaller media mitigated fouling better among higher-sphericity media, the smallest, low-sphericity media here performed similarly or worse; (ii) lower-sphericity media gave lower particle rotation, greater contact area with the membrane, and lower particle momentum; (iii) in contrast to higher-sphericity media, the extent of local fouling mitigation decreased as the particle velocities increased and the local critical flux was not the most strongly correlated with particle momentum; (iv) lower-sphericity media generally gave lower overall critical flux for the same hydrodynamic characteristic; (v) particle sphericity is a negligible factor in the energy-efficiency of fouling mitigation by similar-sized fluidized media, but, between low-sphericity media, the larger media was more energy-efficient. The findings here highlight the non-negligible influence of the particle sphericity of the fluidized media, and are expected to be valuable in the optimization of the properties of the fluidized media towards more energy-efficient membrane fouling mitigation." @default.
- W2792404054 created "2018-03-29" @default.
- W2792404054 creator A5013259692 @default.
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- W2792404054 date "2018-08-01" @default.
- W2792404054 modified "2023-10-12" @default.
- W2792404054 title "Characteristics of non-spherical fluidized media in a fluidized bed–membrane reactor: Effect of particle sphericity on critical flux" @default.
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- W2792404054 doi "https://doi.org/10.1016/j.seppur.2018.03.047" @default.
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