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Three hollow borosilicate glass particles 7040S‐R, 7040S‐F1, and 7040S‐F2 with different particle size distributions were prepared. The size of fluidized particles of 7040S‐F2 was similar with that of the primary particles such as fluid catalytic cracking (FCC), while the bed height was more than twice the static bed height. The small bubbles were uniformly dispersed in the bed, and the high magnitude...