id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-15380		cet-15380		6	.pdf	application/pdf	3229	130	43	Hilligardt K., Werther J., 1987, Influence of temperature and properties of solids on the size and growth of bubbles in gas fluidized beds, Chemical Engineering & Technology, 10, 272–280. Sh – Sherwood number, - U – superficial gas velocity, m/s Ub – bubble velocity, m/s Ue – emulsion phase velocity, m/s Umf – minimum fluidization velocity, m/s X – bubble-emulsion phase mass transfer index, - xCO – CO conversion, -  – bubble fraction, - ε – voidage, - εe – emulsion phase voidage, - εmf – voidage at minimum fluidization conditions, - ρp – particle density, kg/m3 𝜙 – sphericity, - ρp – particle density, kg/m3 Acknowledgments The authors gratefully acknowledge Mr. Antonio Cammarota for the set-up of the experimental apparatus, and Mr. Antonio Russo, University of Naples, for the support during the experimental campaign.	cache/cet-15380.pdf	txt/cet-15380.txt