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Predicting the integral heat of adsorption for gas physisorption on microporous and mesoporous adsorbents
Citation
Whittaker, PB and Wang, X and Zimmermann, W and Regenauer-Lieb, K and Chua, HT, Predicting the integral heat of adsorption for gas physisorption on microporous and mesoporous adsorbents, The Journal of Physical Chemistry Part C, 118, (16) pp. 8350-8358. ISSN 1932-7447 (2014) [Refereed Article]
Copyright Statement
Copyright 2014 American Chemical Society
Abstract
We have developed two predictive methods for the heats of adsorption that
stem from isotherm models and benchmarked them against the Clausius−Clapeyron
equation. These are the Tóth potential function model and the modified Clapeyron
equation. Three adsorbate/adsorbent working pairs are used as examples: n-butane/BAX
1500 activated carbon, isobutane/BAX 1500 activated carbon, and ammonia/Fuji Davison
type RD silica gel, all of which are examples of gas physisorption on adsorbents with both
micro- and mesopores. Isotherms and corresponding integral heats of adsorption were
measured in the range 298−348 K. For n-butane and isobutane, the pressures were up to
235 kPa, and for ammonia, the pressures were up to 835 kPa. Our two predictive methods
consistently offer significant improvements over the Clausius−Clapeyron equation.
Between the two predictive methods, the Tóth model is more robust across all three
working pairs studied with predictions generally falling within 10−15% of the values of the
measured heats.
Item Details
Item Type: | Refereed Article |
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Keywords: | isosteric heat, adsorption, isothermal |
Research Division: | Engineering |
Research Group: | Mechanical engineering |
Research Field: | Energy generation, conversion and storage (excl. chemical and electrical) |
Objective Division: | Energy |
Objective Group: | Energy storage, distribution and supply |
Objective Field: | Energy services and utilities |
UTAS Author: | Wang, X (Professor Xiaolin Wang) |
ID Code: | 92092 |
Year Published: | 2014 |
Web of Science® Times Cited: | 17 |
Deposited By: | Engineering |
Deposited On: | 2014-06-05 |
Last Modified: | 2017-11-06 |
Downloads: | 0 |
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