Microscopic Observation of Gas-Solid Two-Phase Flow with Adhesive Fine Particles

Adhesive fine powder of micron-order diameter affects flow properties of gassolid two-phase flow. However, only a few fundamental research studies have been performed. In this study, flow of a mixture of FCC (dp=70μm, ρp=1400kg/m3) and aluminum hydroxide (dp=7 μm, ρp=2400kg/m3) in a two-dimensional...

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Bibliographic Details
Published inKAGAKU KOGAKU RONBUNSHU Vol. 16; no. 4; pp. 841 - 843
Main Authors Hatano, Hiroyuki, Matsuda, Hiromitsu, Kono, Hisashi
Format Journal Article
LanguageJapanese
Published The Society of Chemical Engineers, Japan 10.07.1990
Subjects
Adhesion
Fine Powder
Flocculated Powder
Fluidization
Micrograph
Two-Phase Flow
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Summary:Adhesive fine powder of micron-order diameter affects flow properties of gassolid two-phase flow. However, only a few fundamental research studies have been performed. In this study, flow of a mixture of FCC (dp=70μm, ρp=1400kg/m3) and aluminum hydroxide (dp=7 μm, ρp=2400kg/m3) in a two-dimensional bed (5×60×400 mm) is observed with a long-distance focus microscope. It is found that individual FCC particles are coated with aluminum hydroxide. Large flocculated powder of FCC produced by medium adhesion force of aluminum hydroxide is observed. Size and number of flocculated powder are a function of gas velocity and concentration of fine particles.
ISSN:0386-216X
1349-9203
DOI:10.1252/kakoronbunshu.16.841