Determination of Differential Enthalpy and Isotherm by Adsorption Calorimetry | Zendy

Vanessa S. García-Cuello | Zendy; Juan Carlos MorenoPiraján | Zendy; Liliana Giraldo-Gutiérrez | Zendy; Karim Sapag | Zendy; G. Zgrablich | Zendy

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Determination of Differential Enthalpy and Isotherm by Adsorption Calorimetry

Author(s) -

Vanessa S. García-Cuello,

Juan Carlos MorenoPiraján,

Liliana Giraldo-Gutiérrez,

Karim Sapag,

G. Zgrablich

Publication year - 2008

Publication title -

research letters in physical chemistry

Language(s) - English

Resource type - Journals

eISSN - 1687-6881

pISSN - 1687-6873

DOI - 10.1155/2008/127328

Subject(s) - adsorption , materials science , chemistry , algorithm , analytical chemistry (journal) , computer science , chromatography

An adsorption microcalorimeter for the simultaneous determination of the differential heat of adsorption and the adsorption isotherm for gas-solid systems are designed, built, and tested. For this purpose, a Calvet heat-conducting microcalorimeter is developed and is connected to a gas volumetric unit built in stainless steel to record adsorption isotherms. The microcalorimeter is electrically calibrated to establish its sensitivity and reproducibility, obtaining K=154.34±0.23 WV−1. The adsorption microcalorimeter is used to obtain adsorption isotherms and the corresponding differential heats for the adsorption of CO2 on a reference solid, such as a NaZSM-5 type zeolite. Results for the behavior of this system are compared with those obtained with commercial equipment and with other studies in the literature

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