Results 171 to 180 of about 5,534 (223)

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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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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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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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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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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Determination of the isosteric heat of adsorption by gas adsorption chromatography

Journal of Chromatography A, 1977
Abstract The determination of the isosteric heat of adsorption by means of polynomial approximation of an experimentally obtained-function—retention volume versus adsorbate pressure—is discussed. The equation is proposed by means of which the isosteric heat of adsorption can easily be calculated by using the approximation coefficients.
J. Gawdzik, M. Jaroniec
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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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Adsorption Affinity of Different Types of Coal: Mean Isosteric Heat of Adsorption

Energy & Fuels, 2015
Understanding the sorption behavior of gas in organic-rich sedimentary rocks and, more specifically, recognizing the adsorption properties of methane in coal and crucial steps for evaluating the coalbed methane (CBM) gas-in-place content, gas quality, and CBM recovery potential.
Xu Tang, Zhaofeng Wang, Nino Ripepi, Bo Kang, Gaowei Yue   +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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