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Unique properties of 30‐μm particles as the catalyst of fluidized‐bed reactors
Author(s) -
Yang Guoqiang,
Wei Fei,
Jin Yong,
Yu Zhiqing,
Wang Yao
Publication year - 1997
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690430509
Subject(s) - bubble , fluidized bed , particle (ecology) , emulsion , materials science , particle size , fluidization , phase (matter) , mineralogy , chemical engineering , mechanics , chemistry , thermodynamics , geology , physics , organic chemistry , engineering , oceanography
The collapse properties of three kinds of fine particles (19, 30, and 59 μm) are studied with a new type of bed‐collapse technique, “isolated dilute‐phase bed collapse,” to determine the dense‐phase properties under high superficial gas velocities. The properties of the emulsion and bubble phases are investigated by a video camera. The influence of particle size on particle collapse properties is also discussed. When gas velocities are high the 30‐μm particles take the longest to collapse, have the smallest emulsion density, and have largest bubble volumetric fraction. These observations indicate that the 30‐μm particles have a property that the others lack.