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Adsorption of Carbon Dioxide on Energetically Heterogeneous Adsorbents

D. Burevski ; Faculty of Technology and Metallurgy, Kiril and Metodij University, Skopje, Yugoslavia

Sažetak

Adsorption isotherms of carbon dioxide at 295 K and 195 K
and heat of adsorption at 295 K on two adsorbents, alumina and :
gasil silica with different degrees of surface heterogeneity, have
been determined. A method for evaluation of the surface heterogeneityof the adsorbents is proposed. By the present method the degree of surface heterogeneity is estimated from the differential
distribution of molar work of adsorption determined by the Dubinin-
Astakhov equation. Results of the analysis of the nature
of adsorbent surfaces were confirmed by the differential site
energy distribution and by the data of the integral and differential
molar heats of adsorption.
The adsorption isotherms were analized by the Sips and
three parameters BET (k-BET) equations. The specific surface
area of the adsorbents, calculated from the monolayer caoacity
determined from the plots of equations, is considered in relation
to the adsorbent/adsorbate interaction.

Ključne riječi

Hrčak ID:

175376

URI

https://hrcak.srce.hr/175376

Datum izdavanja:

30.3.1989.

Posjeta: 507 *