کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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657527 | 1458069 | 2014 | 11 صفحه PDF | دانلود رایگان |
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.
Arrhenius plot of parent Maxsorb III/ethanol, KOH-H2 treated Maxsorb III/ethanol and H2 treated Maxsorb III/ethanol pairs.Figure optionsDownload as PowerPoint slide
Journal: International Journal of Heat and Mass Transfer - Volume 73, June 2014, Pages 445–455