Results 161 to 170 of about 3,683 (204)

On the Henry constant and isosteric heat at zero loading in gas phase adsorption [PDF]

Journal of Colloid and Interface Science, 2008
The Henry constant and the isosteric heat of adsorption at zero loading are commonly used as indicators of the strength of the affinity of an adsorbate for a solid adsorbent.
David Nicholson, H D Do, H D
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ISOSTERIC HEAT OF ADSORPTION OF OXYGEN ON SILVER

Journal of Vacuum Science and Technology, 1976
Adsorption isotherms have been measured on cleaned silver powder from 178 to 339°C at oxygen pressures of 0.226 Pa to 40 kPa using a vacuum ultramicrobalance. Adsorption equilibrium was found at all temperatures and pressures studied. The surface was prepared for the reproducible chemisorption studies and cleaned before the determination of each ...
openaire   +1 more source

Derivation of isosteric heat of adsorption for non-ideal gases

International Journal of Heat and Mass Transfer, 2015
Abstract This paper presented a theoretical framework for precise determination of the isosteric heat of adsorption for non-ideal gases. The derived equation had been applied for various adsorbent–refrigerant pairs. Highly porous activated carbon powder, namely Maxsorb III and activated carbon fiber of type (A-20) were used as adsorbents with HFC ...
Bidyut Baran Saha, Ahmed Askalany
exaly   +2 more sources

Moisture sorption isotherms and isosteric heat for pistachio

European Food Research and Technology, 2006
The equilibrium moisture contents (EMC) of pistachio were determined using the standard static-gravimetric method at 15, 25, 35 and 40 °C for pistachio powder at 15, 35 °C for pistachio kernel and pistachio nut for water activity (a w) ranging from 0.11 to 0.9.
M. Yazdani, P. Sazandehchi, M. Azizi, P. Ghobadi   +3 more
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Isosteric heat of adsorption and the vacancy solution model

AIChE Journal, 1987
Donnees theoriques et cas de l'adsorption d'hydrocarbures et de CO 2 sur de la Nuxit-Al, ainsi que de l'adsorption d'O 2 , N 2 et CO sur une zeolite ...
Orhan Talu, R. L. Kabel
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Isosteric Heats of Adsorption from Gas Mixtures

Journal of Colloid and Interface Science, 1998
Isosteric heats of gas-mixture adsorption required in the energy balances of adsorption process design are calculated using a thermodynamically consistent multicomponent isotherm. This isotherm and the resulting heats of adsorption possess proper limiting behavior and account for adsorbates of different sizes.
Narasimhan Sundaram, Ralph T. Yang
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On the basic equation of sorption and the isosteric heat

Wood Science and Technology, 1991
Precise derivations are given for the basic equation of sorption, -RT ln r = Δh -T Δs. and for the isosteric heat. The prefix Δ indicates the change from sorbed liquid to free liquid. The above basic equation is interpreted as an equilibrium moisture constant (emc) equation. It is shown how Δs/R varies with temperature under the assumption that Δh/l is
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Isosteric and calorimetric heats of adsorption of methanol on coal

Energy & Fuels, 1992
A thermodynamic approach was used to study the surface heterogeneity of Bruceton coal sample. Specifically, the heat of adsorption of methanol on coal was obtained by two different techniques, viz. calorimetry and gas adsorption. Analysis of the isosteric heat of adsorption obtained from the adsorption isotherms revealed that below monolayer coverage ...
R. Ramesh, M. Francois, P. Somasundaran, J. M. Cases   +3 more
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Investigation of the isosteric heat of adsorption for supercritical methane on shale under high pressure [PDF]

Adsorption Science and Technology, 2019
The isosteric heat of adsorption (IHA) is one of the key thermodynamic variables for evaluating the interaction between shale and methane, which is rarely studied especially under high pressure.
Shangwen Zhou
exaly   +2 more sources

Isosteric heats of sorption and desorption of phenanthrene in soils and carbonaceous materials

Environmental Pollution, 2013
Isosteric heats (ΔH) of sorption/desorption of phenanthrene were determined for carbonaceous materials (Pahokee peat, lignite, and high-volatile bituminous coal) and two soils based on reported equilibrium sorption/desorption isotherms at four different temperatures (4, 20, 46 and 77 °C).
Guohui, Wang, Peter, Grathwohl
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