Uncertainty of adsorption isotherms of n-hexane on active charcoal in the region of small pressures and its influence on calculations of heats of adsorption

1971 ◽  
Vol 36 (11) ◽  
pp. 3555-3562 ◽  
Author(s):  
J. Juliš ◽  
J. Dědek ◽  
P. Fott
Keyword(s):  
Adsorption Isotherms ◽  
Active Charcoal ◽  
Heats Of Adsorption

Calorimetric Heats of Adsorption and Adsorption Isotherms. 3. Mixtures of CH4and C2H6in Silicalite and Mixtures of CO2and C2H6in NaX

Langmuir ◽  
1997 ◽  
Vol 13 (16) ◽  
pp. 4333-4341 ◽  
Author(s):  
J. A. Dunne ◽  
M. Rao ◽  
S. Sircar ◽  
R. J. Gorte ◽  
A. L. Myers
Keyword(s):  
Adsorption Isotherms ◽  
Heats Of Adsorption

Adsorption isotherms and isosteric heats of adsorption for ethane, propane, and n-butane on polystyrene

1985 ◽  
Vol 106 (2) ◽  
pp. 399-409 ◽  
Author(s):  
Daniel P. Rothstein ◽  
Bao-Gang Wu ◽  
T. Victor Lee ◽  
Richard Madey
Keyword(s):  
Adsorption Isotherms ◽  
Heats Of Adsorption

scholarly journals Comparative Adsorption of Phenol, P-Nitrophenol and P-Hydroxybenzoic Acid on Activated Carbon

1988 ◽  
Vol 5 (3) ◽  
pp. 213-228 ◽  
Author(s):  
Enrique Costa ◽  
Guillermo Calleja ◽  
Luis Marijuán
Keyword(s):  
Activated Carbon ◽  
Physicochemical Properties ◽  
Adsorption Capacity ◽  
Adsorption Isotherms ◽  
Curve Fitting ◽  
Hydroxybenzoic Acid ◽  
Heats Of Adsorption ◽  
Micro Organisms

Adsorption isotherms of phenol, p-nitrophenol and p-hydroxybenzoic acid at three temperatures in the range 1–40° C on activated carbon have been obtained experimentally. Curve fitting to several theoretical equations shows that the Prausnitz equation gives the lowest deviations (1–3%). An inversion of the adsorption capacity of phenol with temperature has been observed, probably as a consequence of the high microporosity of the carbon and the restricted accessibility of phenol to the smaller pores. Adsorption at 40°C is also accompanied by the degradation of phenol by aerobic micro-organisms (ficomicetus-type fungi). Approximate values of the isosteric heats of adsorption of p-nitrophenol have been calculated, being in the range 5.8–6.5 kcal/mol. Differences in the behaviour of the three adsorbates are commented upon in terms of their physicochemical properties.

ISOTHERMS OF BROMINE ON GRAPHITE

1959 ◽  
Vol 37 (5) ◽  
pp. 899-904 ◽  
Author(s):  
J. G. Hooley
Keyword(s):  
Adsorption Isotherms ◽  
Kcal Mole ◽  
Natural Graphite ◽  
Heats Of Adsorption ◽  
Carbon Blacks ◽  
Surface Areas

The isotherms of bromine on eight carbon blacks and on natural graphite have been related to the known structures of these materials. The surface areas can be calculated from the adsorption isotherms and the size of the graphite crystals can be estimated from the extent of hysteresis on desorption. The isosteric heats of adsorption on the surface and between the layers are each 11 kcal mole−1. The formation of residue compounds displaces the isotherms equally at all pressures.

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