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Mass Transfer and Liquid‐Film Formation in a Spray Tower for SO 2 Removal in Sodium Hydroxide Solution
Author(s) -
Codolo Milene Costa,
Bizzo Waldir Antonio
Publication year - 2016
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.201500389
Subject(s) - mass transfer , mass transfer coefficient , tower , sodium hydroxide , volumetric flow rate , chemistry , analytical chemistry (journal) , materials science , mechanics , chromatography , civil engineering , physics , engineering
Spray towers allow for controlling air pollution in which a liquid is sprayed in small droplets to produce a large interfacial area for mass transfer between a gas and a liquid phase. An experimental study of a spray tower for removing SO 2 is described. The experiments were carried out under different operating conditions by varying the gas velocity, liquid flow rate, and SO 2 concentration. SO 2 removal efficiency, volumetric mass transfer coefficient, and liquid‐film formation as a result of the collision of droplets against the tower wall are investigated. Removal efficiency and volumetric mass transfer coefficient are analyzed as a function of gas velocity, liquid flow rate, and SO 2 concentration, while liquid‐film formation is evaluated as a function of tower height. The results indicate high removal efficiency. Correlations to predict the volumetric mass transfer coefficient are also proposed.