Effects of Particle Concentration and Slurry Height on Gas Holdup in a Slurry Bubble Column

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Kosuke Hayashi¹  Kengo Uchida¹  Akio Tomiyama¹  Shohei Sasaki¹ 

[1] Graduate School of Engineering, Kobe University

关键词: Slurry Bubble Column;    Gas Holdup;    Initial Slurry Height;    Froude Number;   

DOI  :  10.1252/jcej.15we280

来源: Maruzen Company Ltd

【 摘 要 】

References(13)Total gas holdups αG in a cylindrical slurry bubble column were measured at various values of the superficial gas velocity JG, the mean particle volumetric concentration CS and the initial slurry height H0 to investigate their effects on αG. The column diameter DH and height were 200 mm and 2000 mm, respectively. The gas, liquid and solid phases were air, water and hydrophilic silica particles of 100 µm in mean diameter, respectively. Experimental conditions were 0.025≤JG≤0.40 m/s, 0≤CS≤0.50 and 1.5≤H0*≤ 5.0, where H0*=H0/DH. The conclusions obtained are as follows: (1) αG decreases with increasing H0 and becomes independent of H0 for H0*>4 at low JG, whereas it depends on H0 at higher JG even for H0*>4, (2) the increase in CS decreases αG up to CS ∼0.40, whereas αG becomes independent of CS at larger CS, and (3) αG in the slurry bubble column at various CS, H0 and JG are well correlated in terms of the Froude number FrH using H0 as a characteristic length.

【 授权许可】

Unknown