Void fraction, bubble size and interfacial area measurements in co-current downflow bubble column reactor with microbubble dispersion
作者： Freddy Hernandez-Alvarado , Dinesh V. Kalaga , Damon Turney , Sanjoy Banerjee , Jyeshtharaj B. Joshi
DOI: 10.1016/J.CES.2017.05.006
关键词: Analytical chemistry 、 High mass 、 Mechanics 、 Porosity 、 Bubble column reactor 、 Bubble 、 Microbubbles 、 Bubble column 、 Void (astronomy) 、 Chemistry
摘要: Abstract Microbubbles dispersed in bubble column reactors have received great interest recent years, due to their small size, stability, high gas-liquid interfacial area concentrations and longer residence times. The lead mass transfer rates compared conventional reactors. In the present work, experiments been performed a downflow reactor with microbubbles generated by novel mechanism determine measuring void fraction size distributions. Gamma-ray densitometry has employed axial radial distributions of speed camera equipped borescope is used measure variations sizes. Also, effects superficial gas liquid velocities on two-phase flow characteristics investigated. Further, reconstruction techniques profiles from gamma densitometry's chordal measurements are discussed for microbubbles. Empirical correlations also proposed predict Sauter mean diameter. results demonstrate that new generation technique offers (1000–4500 m 2 /m 3 ) sub-millimeter bubbles (500–900 µm) overall fractions (10–60%) comparison previous designs.
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