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Intensification of the Rate of Heat and Liquid‐Solid Mass Transfer at the Wall of a Bubble‐Column Reactor by Turbulence Promoters
Author(s) -
Fathalla Ahmed Salah,
Amin Nevine Kamal,
El-Ashtoukhy El-Sayed Zakaria,
Sedahmed Gomaa Hanafy
Publication year - 2021
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202000616
Subject(s) - turbulence , mass transfer , bubble , bubble column reactor , heat transfer , chemistry , mechanics , turbulence kinetic energy , mass transfer coefficient , thermodynamics , chromatography , physics , gas bubble
Rates of heat and liquid‐solid mass transfer in a square bubble column with semicylindrical turbulence promoters at its wall were measured using the electrochemical technique in the bubbly flow regime. Turbulence promoters enhanced the wall liquid‐solid mass or analogous heat transfer coefficients and the corresponding volumetric mass transfer coefficients by factors up to 2.36 and 3.76, respectively, depending on the working conditions. The rate of liquid‐solid mass transfer was improved with increasing superficial gas velocity and decreasing turbulence promoter diameter. The importance of the turbulence promoters as a catalyst support and a built‐in cooler was highlighted. Power consumption measurements revealed that the gas‐sparged reactor outperforms the mechanically stirred reactor.