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Simple Procedure to Estimate Mass Transfer Coefficients from Uptake Curves on Activated Carbons
Author(s) -
Magalhães Siqueira Rafael,
Vilarrasa-García Enrique,
Belo Torres Antônio Eurico,
Silva de Azevedo Diana Cristina,
Bastos-Neto Moisés
Publication year - 2018
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.201800091
Subject(s) - microporous material , mass transfer coefficient , mass transfer , chemistry , thermodynamics , simple (philosophy) , activity coefficient , experimental data , analytical chemistry (journal) , chromatography , mathematics , statistics , physics , aqueous solution , organic chemistry , philosophy , epistemology
A method based on the linear driving force (LDF) approximation is described to estimate the mass transfer coefficient of molecules adsorbing onto microporous carbons, by using independently measured uptake data. This parameter was determined from uptake curves derived from pressure increments during the measurement of isotherm data. To validate the method, simulations for batch uptake were performed and compared to the experimental data in order to obtain the values for the LDF constants. Such values were applied to predict breakthrough curves and compared to experimental data. The proposed method to estimate the LDF coefficient can be adequate to obtain a more physically meaningful value of the mass transfer coefficient.