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Showing 1 to 20 of 300 for “"Isotherms"”.
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Refraction of isotherms: applications to define rift basin geometry
… in thermal conductivity produce refracted isotherms and anomalies in heat flow. For simple steady-state heat conduction, three models of rift basins with various fault attitudes (vertical, high-angle, and listric) and a thermal conductivity ratio of 1:2, basin material:country rock, are …
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Predicting adsorption isotherms in natural water using polyparameter linear free energy relationships
… (NOM) and trace organic contaminants. Adsorption isotherms for trace contaminants in the presence of NOM are needed to predict the performance of activated carbon for removing these compounds, but such data are not available for most of these contaminants and it would be expensive to carry out …
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Evaluation of flow models and pollutant retention isotherms for their application to rain garden bioretention
… to the modelling of heavy metal retention three isotherms were chosen: the linear, Langmuir and Freundlich equations as these were found from previous research to be the most accurate. These isotherms were incorporated into a one dimensional advection-dispersion-adsorption equation in order to …
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An experimental apparatus for the measurement of sorption isotherms of moisture in porous building materials
… automated. Test results consisting of sorption isotherms and scanning curves for sugar pine, southern pine, and an exterior grade plywood are presented. The maximum uncertainty in moisture content measurement is 0.023 kg/kg-dry mass at 85 per cent RH. Results are compared to data from the …
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Characterization Of Nanoporous Materials Using Gas Adsorption Isotherms: Evaluating Their Potential For Gas Storage And Separation Applications
… we have measured volumetric adsorption isotherms using several gases such as neon, argon, tetrafluoromethane (CF4), xenon, and methane (not all gases for all substrates). Experimental adsorption isotherms were measured using methane, argon, xenon, and neon gases on unpurified …
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Development and Comparison of 17beta-Estradiol Sorption Isotherms for Three Agriculturally Productive Soils From Different Physiographic Regions in Virginia
… to reach equilibrium and to develop sorption isotherms for each soil. The time required to reach equilibrium for all soils was less than 24 hours. A linear isotherm provided the best fit to model the sorption of E2 to Cecil and Myatt soils (R2 = 0.94 and 0.96, respectively). For Groseclose …
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Determination of Chemical Activity of Soybean Proteins and Amino Acid Model Systems From NMR Relaxation Data in Relation to Water Sorption Isotherms
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1994.
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Adsorption of binary vapor mixtures into solids
The adsorption isotherms for ethanol-cyclohexane, ethanol-benzene, and benzene-cyclohexane vapor mixtures on Cab-O-Sil and on Graphon at 20, 30, and 40°C were measured at constant total pressure. The adsorption isotherms for the pure components were also obtained. The ethanol/Graphon isotherms were …
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Comparison of the new vapor sorption analyzer to the traditional saturated salt slurry method and the dynamic vapor sorption instrument
… of aw at the same temperature. Moisture sorption isotherms are useful for a variety of processing and product stability applications. The most common methods of generating equilibrium moisture sorption isotherms are using saturated salt slurries (SSS) or humidity generating instruments. The …
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Adsorption from binary solutions of polar n-decyl derivatives and heptane onto alumina
… onto alumina was studied. The net surface excess isotherms were measured and resolved into component isotherms. The heat of immersion of the alumina in n-decanol, ethyl octanoate, and n-decanoic acid solutions was measured. The heats of immersion support the resolved isotherms which indicate that …
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Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials
… of cement based materials, such as sorption isotherms and sorption transport properties in the presence of SCMs. This has been done by studying sorption isotherms mainly using the sorption balance method, and moisture transport coefficients using both the cup method and a sorption dynamic …
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ΙΣΟΡΡΟΠΙΑ ΑΝΤΑΛΛΑΞΙΜΩΝ-ΔΙΑΛΥΤΩΝ ΜΟΡΦΩΝ ΚΑΛΙΟΥ-ΜΑΓΝΗΣΙΟΥ ΣΤΑ ΕΔΑΦΗ
… OF THE SOILS. COMPARISON OF THE EXPERIMENTAL ISOTHERMS TO THE NON-PREFERENCE ISOTHERMS REVEALED THAT ALL THREE SOILS EXHIBITED HIGH PREFERENCE FOR POTASSIUM RELATIVE TO MAGNESIUM IONS. THE VALUES OF THE THERMODYNAMIC PARAMETERS KEQ, ΔGO, ΔΗO, ΔSO FOR THE K_MG EXCHANGE, CALCULATED FROM THE …
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Investigating the glassy to rubbery transition of polydextrose and corn flakes using automatic water vapor sorption instruments, DSC, and texture analysis
… material, polydextrose. The automated sorption isotherms were obtained from 20 to 40°C at 5°C intervals using dynamic vapor sorption (DVS). The DVS ramping isotherm was obtained at a linearly increasing relative humidity (RH), 2%RH/hr, from 10 to 85%RH. The DVS equilibrium isotherm was obtained …
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Computational studies of hydrogen in palladium
… reproduces the form of the pressure-composition isotherms well. Short rangepairwise repulsive forces reproduce much of the hydrogen ordering seen within the lattice.A suitable scaling between the long and short range forces has been found whichappears to reproduce both the isotherms and the …
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Equilibrium moisture content measurement for porous building materials at various temperatures
Sorption isotherms and scanning data were obtained for three test materials at three different temperatures. These data resulted from further investigating the operating range of an existing experimental apparatus and procedure. During the course of the research, the operating range and control of …
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Binary gas adsorption on molecular sieves. Experimental data for the adsorption of oxygen, nitrogen and oxygen-nitrogen mixtures on five molecular sieve adsorbents at various temperatures and pressures and a comparison with theoretical models.
… sieve pellets has been made. Pure component isotherms, using a volumetric apparatus, have been measured for each gas on each adsorbent at pressures up to 9 bar and for temperatures of 278.15,293.15 and 303.15 K. Curve fitting of the pure canponent isotherms has been attempted using the …
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Role of adsorption in catalysis: applications of NMR relaxometry
… (IR) spectroscopy, volumetric adsorption isotherms, dynamic isotherms via a Tapered Element Oscillating Microbalance (TEOM), temperature programmed desorption (TPD) as well as 13C T1 NMR and 1H 2D T1-T2 relaxometry methods were employed. Energies of adsorption as a function of coverage …
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