STUDIES OF ADSORPTION ENTHALPY IN A SERIES OF ACTIVATED CARBONS

DEBORA SOARES MAIA; JC ALEXANDRE DE OLIVEIRA; KARIM SAPAG; MARCELO NAZZARRO; RAUL LOPEZ; DIANA AZEVEDO

Rio de Janeiro

Congreso; Carbon Conference 2013; 2013

The differential enthalpy of adsorption is required for meaningful modeling of many adsorption processes. This can range from interest in the heat generated itself (e.g., adsorption refrigeration cycles) to the impact that the heat generation and dissipation has on adsorption kinetics (e.g., industrial adsorption beds) [1]. The differential enthalpy of adsorption is a direct indicator of the heterogeneity of the interaction between the adsorptive (either a pure gas or a mixture) and the adsorbent [2]. However, the amount of experimental and theoretical work dedicated to the adsorption capacities of adsorbents far outweighs that dedicated to heats of adsorption. This can be explained by the fact that the measurement of the enthalpy differential of adsorption is significantly more difficult and expensive than the measurement of an adsorption isotherm.