TY - JOUR
T1 - Adsorption of ethanol onto parent and surface treated activated carbon powders
AU - El-Sharkawy, Ibrahim I.
AU - Uddin, Kutub
AU - Miyazaki, Takahiko
AU - Saha, Bidyut Baran
AU - Koyama, Shigeru
AU - Miyawaki, Jin
AU - Yoon, Seong Ho
N1 - Funding Information:
This work was financially supported by Japan Science and Technology Agency (JST), Core Research Evolution Science and Technology (CREST) .
PY - 2014/6
Y1 - 2014/6
N2 - In this paper, adsorption isotherms and kinetics of ethanol onto highly porous activated carbon powders have been investigated. Adsorbents used in the present study are (i) parent Maxsorb III, (ii) KOH-H2 treated Maxsorb III, and (iii) H2 treated Maxsorb III. Adsorption isotherms and kinetics of the assorted pairs have been measured using magnetic suspension adsorption measurement unit (MSB-VG-S2). Experiments have been conducted across assorted adsorption temperatures that are useful for the operation of adsorption chillers. The Dubinin-Astakhov equation is used to fit adsorption isotherms of parent Maxsorb III/ethanol and KOH-H2 treated Maxsorb III pairs whilst the Dubinin-Radushkevich isotherm model is found to be more suitable for fitting of adsorption uptake of H2-treated Maxsorb III/ethanol pair. Adsorption kinetics of assorted pairs are presented by the Fickian diffusion model. Experimental results show that, among the assorted pairs, H2 treated Maxsorb III/ethanol pair possesses the highest adsorption equilibrium uptake. However, the diffusion time constant of KOH-H2 treated Maxsorb III is found to be higher than that of other two studied pairs.
AB - In this paper, adsorption isotherms and kinetics of ethanol onto highly porous activated carbon powders have been investigated. Adsorbents used in the present study are (i) parent Maxsorb III, (ii) KOH-H2 treated Maxsorb III, and (iii) H2 treated Maxsorb III. Adsorption isotherms and kinetics of the assorted pairs have been measured using magnetic suspension adsorption measurement unit (MSB-VG-S2). Experiments have been conducted across assorted adsorption temperatures that are useful for the operation of adsorption chillers. The Dubinin-Astakhov equation is used to fit adsorption isotherms of parent Maxsorb III/ethanol and KOH-H2 treated Maxsorb III pairs whilst the Dubinin-Radushkevich isotherm model is found to be more suitable for fitting of adsorption uptake of H2-treated Maxsorb III/ethanol pair. Adsorption kinetics of assorted pairs are presented by the Fickian diffusion model. Experimental results show that, among the assorted pairs, H2 treated Maxsorb III/ethanol pair possesses the highest adsorption equilibrium uptake. However, the diffusion time constant of KOH-H2 treated Maxsorb III is found to be higher than that of other two studied pairs.
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U2 - 10.1016/j.ijheatmasstransfer.2014.02.046
DO - 10.1016/j.ijheatmasstransfer.2014.02.046
M3 - Article
AN - SCOPUS:84896530407
SN - 0017-9310
VL - 73
SP - 445
EP - 455
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
ER -