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Related Experiment Video

Updated: May 16, 2026

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5

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Published on: August 25, 2016

Predicting isosteric heats for gas adsorption.

Peter B Whittaker¹, Xiaolin Wang, Klaus Regenauer-Lieb

¹School of Mechanical and Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia. peter.whittaker@uwa.edu.au

Physical Chemistry Chemical Physics : PCCP

|November 23, 2012

Summary

This summary is machine-generated.

A new method predicts gas adsorption heat using a single isotherm measurement, simplifying previous techniques. This approach utilizes Tóth and Langmuir isotherm equations for accurate isosteric heat predictions on solid materials.

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Area of Science:

Physical Chemistry
Materials Science
Surface Science

Background:

Predicting isosteric heat of gas adsorption is crucial for material characterization.
Traditional methods like Clausius-Clapeyron require multiple isotherms or complex calorimetry.
A simplified approach is needed for efficient and accurate heat prediction.

Purpose of the Study:

To develop a novel method for predicting the isosteric heat of gas adsorption.
To simplify the process by requiring only a single gas adsorption isotherm measurement.
To validate the new method against experimental calorimetric data.

Main Methods:

Utilized the Tóth potential function, derived from the Polanyi potential function.
Employed Langmuir and Tóth isotherm equations to derive new isosteric heat equations.
Fitted isotherm data to determine shared parameters for both isotherm and isosteric heat equations.

Main Results:

Developed new equations for isosteric heat prediction based on single isotherm data.
Demonstrated the method's applicability to zeolites and titanium dioxide.
Showed good agreement between predicted and experimentally measured isosteric heat values.

Conclusions:

The developed method offers a simplified and effective way to predict isosteric heat of gas adsorption.
This single-isotherm approach reduces experimental complexity compared to existing methods.
The findings are relevant for the design and application of adsorbent materials.