Results 171 to 180 of about 7,916 (223)

Isosteric Heat of Adsorption:  Theory and Experiment

The Journal of Physical Chemistry B, 1999
The isosteric heats of adsorption of the components of a gas mixture are critical variables for design of adsorbers for gas separation. They can be unambiguously defined by the Gibbsian Surface Excess (GSE) model of multicomponent adsorption. These variables can be experimentally measured by multicomponent differential calorimetry (MDC) and directly ...
S, Sircar, R, Mohr, C, Ristic, M B, Rao
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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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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 for repulsive interactions

Surface Science Letters, 1991
Abstract The isosteric heat of adsorption of particles with repulsive nearest-neighbour interactions on a square lattice is calculated using the transfer matrix method. A significant diminution of enhancement of this repulsion is observed around half-coverage and at temperatures below and near the order-disorder transition.
S.H. Payne, H.J. Kreuzer, L.D. Roelofs
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The isosteric heat of adsorption on heterogeneous surfaces

Journal of Colloid and Interface Science, 1975
Abstract A simulation of the adsorption of sorbate on a solid surface using the Langmuir isotherm for heterogeneous surfaces has been carried out in order to explain the less common shapes of the dependences of isosteric heat of adsorption upon surface coverage, experimentally observed for the adsorption of aliphatic amines on alumina.
Josef Koubek, Josef Pašek, Jiří Volf
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Isosteric heat of hydrogen adsorption on MOFs: comparison between adsorption calorimetry, sorption isosteric method, and analytical models

Applied Physics A, 2015
Isosteric heat of adsorption is an important parameter required to describe the thermal performance of adsorptive storage systems. It is most frequently calculated from adsorption isotherms measured over wide ranges of pressure and temperature, using the so-called adsorption isosteric method.
A. F. Kloutse, R. Zacharia, D. Cossement, R. Chahine, R. Balderas-Xicohténcatl, H. Oh, B. Streppel, M. Schlichtenmayer, M. Hirscher   +8 more
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Comparison of Experimental Techniques for Measuring Isosteric Heat of Adsorption

Adsorption, 2000
Experimental measurements of heats of adsorption published in the literature are often in disagreement; differences of 10-20% are common. The three most widely used experimental methods are: (1) differentiation of adsorption isotherms at constant loading; (2) measurement of adsorption isosteres; (3) calorimetry. Results from these methods were compared
Shen, Dongmin, Bülow, Martin, Siperstein, Flor, Engelhard, Maximilian, Myers, Alan L.   +4 more
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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 ...
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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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Gaseous adsorption of hexamethyldisiloxane on carbons: Isotherms, isosteric heats and kinetics

Chemosphere, 2020
Volatile methylsiloxanes (VMS) are a special kind of impurity that exist in biogas and seriously hamper its utilization; therefore, their removal has attracted great attention in recent years. Adsorption is the only technology that is currently capable of industrial-scale removal of VMS.
Gang Wang, Na Li, Xin Xing, Yonggang Sun, Zhongshen Zhang, Zhengping Hao   +5 more
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