Adsorption parameter and heat of adsorption of activated carbon/HFC-134a pair

Wai Soong Loh; M. Kumja; Kazi Afzalur Rahman; Kim Choon Ng; Bidyut Baran Saha; Shigeru Koyama; Ibrahim El Sharkawy

doi:10.1080/01457631003603949

Adsorption parameter and heat of adsorption of activated carbon/HFC-134a pair

Wai Soong Loh, M. Kumja, Kazi Afzalur Rahman, Kim Choon Ng, Bidyut Baran Saha, Shigeru Koyama, Ibrahim El Sharkawy

Biological, Environmental Sciences and Engineering

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

This article presents the adsorption isotherms of HFC-134a and activated carbon Maxsorb III measured using the constant-volume-variable-pressure method. The adsorption isotherms cover temperature ranges from 293 to 338 K and pressures up to 0.7 MPa. The trends of the experimental isotherms for activated carbon are found to be identical in all cases with previous studies except that the vapor uptake is slightly higher. The adsorption characteristic of the Dubinin-Ashtakov equation has been regressed from the experimental isotherms data and the maximum specific uptake is 2.15 kg of adsorbate adsorbed per kilogram of activated carbon. The heat of adsorption, which is concentration and temperature dependent, has also been extracted from the experiments.

Original language	English (US)
Pages (from-to)	910-916
Number of pages	7
Journal	Heat Transfer Engineering
Volume	31
Issue number	11
DOIs	https://doi.org/10.1080/01457631003603949
State	Published - Jan 2010

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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title = "Adsorption parameter and heat of adsorption of activated carbon/HFC-134a pair",

abstract = "This article presents the adsorption isotherms of HFC-134a and activated carbon Maxsorb III measured using the constant-volume-variable-pressure method. The adsorption isotherms cover temperature ranges from 293 to 338 K and pressures up to 0.7 MPa. The trends of the experimental isotherms for activated carbon are found to be identical in all cases with previous studies except that the vapor uptake is slightly higher. The adsorption characteristic of the Dubinin-Ashtakov equation has been regressed from the experimental isotherms data and the maximum specific uptake is 2.15 kg of adsorbate adsorbed per kilogram of activated carbon. The heat of adsorption, which is concentration and temperature dependent, has also been extracted from the experiments.",

author = "Loh, {Wai Soong} and M. Kumja and Rahman, {Kazi Afzalur} and Ng, {Kim Choon} and Saha, {Bidyut Baran} and Shigeru Koyama and {El Sharkawy}, Ibrahim",

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T1 - Adsorption parameter and heat of adsorption of activated carbon/HFC-134a pair

AU - Loh, Wai Soong

AU - Kumja, M.

AU - Rahman, Kazi Afzalur

AU - Ng, Kim Choon

AU - Saha, Bidyut Baran

AU - Koyama, Shigeru

AU - El Sharkawy, Ibrahim

PY - 2010/1

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N2 - This article presents the adsorption isotherms of HFC-134a and activated carbon Maxsorb III measured using the constant-volume-variable-pressure method. The adsorption isotherms cover temperature ranges from 293 to 338 K and pressures up to 0.7 MPa. The trends of the experimental isotherms for activated carbon are found to be identical in all cases with previous studies except that the vapor uptake is slightly higher. The adsorption characteristic of the Dubinin-Ashtakov equation has been regressed from the experimental isotherms data and the maximum specific uptake is 2.15 kg of adsorbate adsorbed per kilogram of activated carbon. The heat of adsorption, which is concentration and temperature dependent, has also been extracted from the experiments.

AB - This article presents the adsorption isotherms of HFC-134a and activated carbon Maxsorb III measured using the constant-volume-variable-pressure method. The adsorption isotherms cover temperature ranges from 293 to 338 K and pressures up to 0.7 MPa. The trends of the experimental isotherms for activated carbon are found to be identical in all cases with previous studies except that the vapor uptake is slightly higher. The adsorption characteristic of the Dubinin-Ashtakov equation has been regressed from the experimental isotherms data and the maximum specific uptake is 2.15 kg of adsorbate adsorbed per kilogram of activated carbon. The heat of adsorption, which is concentration and temperature dependent, has also been extracted from the experiments.

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Adsorption parameter and heat of adsorption of activated carbon/HFC-134a pair

Abstract

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