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Predicting isosteric heats for gas adsorption
journal contribution
posted on 2023-05-17, 15:48 authored by Whittaker, PB, Xiaolin WangXiaolin Wang, Regenauer-Lieb, K, Chua, HTA method for predicting the isosteric heat of gas adsorption on solid materials is developed which requires the measurement of a single isotherm – where previous methods, such as the Clausius–Clapeyron approach, require either multiple isotherms or complex calorimetric measurement. The Tóth potential function, stemming from the Polanyi potential function, is evaluated using the Langmuir and Tóth isotherm equations to generate new equations for the isosteric heat. These new isosteric heat equations share common parameters with the isotherm equations and are determined from isotherm fitting. This method is demonstrated in the literature for gas adsorption onto solid adsorbates including zeolites of various surface charge character and non-porous rutile phase titanium dioxide. Predictions are made using the new isosteric heat equations and then compared to calorimetric data.
History
Publication title
Physical Chemistry Chemical PhysicsVolume
15Pagination
473-482ISSN
1463-9076Department/School
School of EngineeringPublisher
RSC PublicationsPlace of publication
Thomas Graham House, Science Park, Milton Rd, Cambridge, England, Cambs, Cb4 0WfRights statement
Copyright 2013 RSCRepository Status
- Restricted