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The effect of temperature on limiting current density and mass transfer in electrodialysis
Author(s) -
Hwang JinYih,
Lai JuinYih
Publication year - 1987
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280370207
Subject(s) - limiting current , mass transfer , electrodialysis , limiting , arrhenius equation , chemistry , current (fluid) , current density , analytical chemistry (journal) , thermodynamics , flux (metallurgy) , chromatography , physics , membrane , electrochemistry , activation energy , mechanical engineering , biochemistry , electrode , quantum mechanics , engineering , organic chemistry
This study focuses on a high‐temperature operation in electrodialysis of salt solutions and studies the effect of temperature on limiting current density and mass transfer. Experiments were conducted under various conditions of temperature (T), varying from 15 to 90°C; of dialysate concentration (C d ), varying from 5 × 10 −3 to 3 × 10 −2 M ; and of dialysate velocity (u d ), varying from 0.206 to 2.44 cm s −1 . A least squares fitting of the experimental data on limiting current density ( I lim ) yields an Arrhenius equation as follows:The molar flux N̄ (mol cm −2 s −1 ), initial concentration (C 0 ; M ) and temperature (T; °C) were found to have the following relationship:N̄/C 0 is slightly increased with increasing temperature ranging from 25 to 70°C.