Results 171 to 180 of about 167,523,944 (204)

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; id_orcid 0000-0003-3464-2100, 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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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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Interaction energy and isosteric heat of adsorption between hydrogen and magnesium diboride

Physical Chemistry Chemical Physics, 2023
A first-principles analytical model of gas physisorption on a layered material is developed through specific evaluation of molecular H 2 adsorption on crystalline MgB 2 , with benchmarking from density functional theory computations.
Thi Kieu Ngan Pham, Sichi Li, Joseph J. Brown   +2 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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The applicability of the numerical algorithm for the evaluation of isosteric heat of adsorption

Carbon, 2004
Abstract The calculation of isosteric enthalpy from an adsorption equation, and the comparison of theoretical enthalpy plot with the values measured calorimetrically is the fundamental condition for the verification of the correctness of an adsorption model.
Radosław P. Wesołowski, Piotr.A. Gauden, Artur P. Terzyk, Sylwester Furmaniak   +3 more
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Isosteric heats of adsorption for nitrogen adsorbed on microporous silica

Journal of the Chemical Society A: Inorganic, Physical, Theoretical, 1971
Nitrogen adsorption isotherms at three different but similar temperatures were determined on samples of microporous silicas prepared by a freeze–thaw technique. A maximum in the plot of the isosteric heat of adsorption against coverage was observed on all the samples investigated.
D. Dollimore, T. Shingles
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On the thermodynamic modeling of the isosteric heat of adsorption and comparison with experiments

Applied Physics Letters, 2006
A theoretical framework for the estimation of the isosteric heat of adsorption between an adsorbate (vapor) and an adsorbent (solid) is proposed based on the thermodynamic requirements of chemical equilibrium, Maxwell relations, and the entropy of the adsorbed phase.
Chakraborty, A., Saha, B.B., Koyama, S., Ng, K.C.   +3 more
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Characterization of Adsorption-Induced Swelling of Coal Considering Isosteric Heat of Adsorption

59th U.S. Rock Mechanics/Geomechanics Symposium
ABSTRACT: The volumetric response of coal with gas depletion in coalbed methane (CBM) reservoirs is a widely recognized fact. The adsorption-induced swelling has a significant impact on coal permeability, controlling the production efficiency of CBM. This phenomenon has received considerable implications on enhanced
Kunming Zhang, Ang Liu, Shimin Liu
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