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Kinetics and Equilibrium of Dissolved Oxygen Adsorption on Activated Carbon by Vassileios M. Matsis; Helen P. Grigoropoulou is a Engineering article available to read on EtoBox.

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The macroscopic adsorption behavior of dissolved oxygen on a coconut shell-derived granular activated carbon has been studied in batch mode at 301 and 313 K for initial dissolved oxygen concentrations of 10-30 mg/l and oxygen/carbon ratios of 2-180 mg/g. BET (Brunauer, Emmett, and Teller) surface area, micropore volume, and pore size distribution were determined from N 2 isotherm data for fresh and used samples of carbon. The surface groups were characterized using Boehm titrations, potentiometric titrations, and FTIR study. The material is characterized by its high specific surface area (1307 m 2 /g), microporocity (micropore volume 0.54 cm 3 /g), its basic character (0.57 meq/g total basic groups) and its high iron content (15,480 ppm Fe). BET n-layer isotherm describes adsorption equilibrium suggesting cooperative adsorption and important adsorbate-adsorbate interactions. Kinetic data suggest a process dependent on surface coverage. At low coverage a Fickian, intraparticle diffusion rate model assuming a local equilibrium isotherm (oxygen dissociation reaction) adequately describes the process. The calculated diffusion coefficients (D) vary between (4.7.8.2) × 10 -9 m 2 / min an

Who reads Kinetics and Equilibrium of Dissolved Oxygen Adsorption on Activated Carbon?

Author

Vassileios M. Matsis; Helen P. Grigoropoulou

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0009-2509)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)