iGC-SEA Week 2022: New IGC Application Spaces for High Temperature Measurements

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Inverse Gas Chromatography (IGC) is a rapid technique to determine thermodynamic parameters of gas-solid interactions and to characterize physicochemical properties of solid substrates. IGC offers its applicability where it is difficult and even impossible to characterize the surface of some forms of solids (powders and particulates) by means of other popular techniques as wetting method or FTIR. Solids and highly viscous liquids in many forms can be easily studied by means of IGC [1]. In this short presentation, we show three applications of IGC at high temperature and we introduce the new IGC- SEA system with high temperature oven.

First, adsorption isotherm data of several alkyl aromatic hydrocarbons (benzene, toluene, ethylbenzene, o-xylene, m-xylene and p-xylene) were measured in the temperature range of 423–523 K on a partially dealuminated faujasite type DAY F20 zeolite by inverse gas chromatography. The gas–solid equilibria and modelling were interpreted on the basis of the interfacial properties of the zeolite, by dispersive, specific and total surface energy heterogeneity profiles and distributions of the adsorbent measured by surface energy analysis.

Diffusion and mass transfer play a significant role in several materials processing operations. Diffusion and mass transfer are also of crucial importance in affecting the structure of solid products including segregation phenomena in castings and impurity distribution in crystal growth [2]. In the second study diffusion coefficients of cyclohexane and toluene on two catalyst samples were measured at 523 °C and 573 K and the uncertainty in the measurement was also determined.

In the last study, we investigated the thermal stability of anode and cathode materials by measuring the surface energetics at different temperatures, which is important during development of the battery materials, besides energy density, power density, lifetime, charging rate, cost and safety.

[1] A. Voelkel et al., Inverse gas chromatography as a source of physiochemical data, Journal of Chromatography A., 1216 (2009)
[2] Iguchi, M., Ilegbusi, O.J., (2013) Diffusion and Mass Transfer, Basic Transport Phenomena in Materials Engineering. Springer, London, 135- https://doi.org/10.1007/978-4-431-54020-5