Determination of an improved linear driving force equation for adsorption of ethanol on activated carbon fiber

Ibrahim I. El-Sharkawy*, Bidyut Baran Saha, Anutosh Chakraborty, Ken Kuwahara, Shigeru Koyama, N. G. Kim Choon

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, the adsorption rate of ethanol on activated carbon fiber (ACF) of type (A-20) has been measured using a thermo-gravimetric analyzer (TGA) unit over a wide range of adsorption temperatures, typically from 27 to 60°C, which is useful for adsorption chillers design. The mass uptake is measured accurately with a time interval of 0.5 second from which the diffusion time constant and consequently, the overall mass transfer coefficient could be evaluated. A novel concentration profile, w(r,t)=a0+a1r2+k, with an exponent parameter k, has been proposed in the theoretical model which accounts for the effect of meso- And micro-pore structures within the ACF. The proposed concentration profile removes the restrictions between the overall mass transfer coefficient and the diffusion time constant. Using the measured kinetics, the numerical value of k is evaluated, leading to a new form of linear driving force (LDF) model for cylindrical adsorbent that could capture the higher ethanol uptake in ACF and this LDF model has been validated experimentally.

Original languageEnglish (US)
Title of host publication3rd Asian Conference on Refrigeration and Air-Conditioning, ACRA 2006
PublisherSociety of Air-conditioning and Refrigerating Engineers of Korea, SAREK
StatePublished - 2006
Externally publishedYes
Event3rd Asian Conference on Refrigeration and Air-Conditioning, ACRA 2006 - Gyeongju, Korea, Republic of
Duration: May 21 2006May 23 2006

Other

Other3rd Asian Conference on Refrigeration and Air-Conditioning, ACRA 2006
CountryKorea, Republic of
CityGyeongju
Period05/21/0605/23/06

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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