scholarly journals Description of Isotherms of Two-Component Non-Electrolyte Solution Adsorption onto Solids with Structural Heterogeneity of Adsorbents Taken into Consideration

1988 ◽  
Vol 5 (2) ◽  
pp. 106-115 ◽  
Author(s):  
P. Cysewski ◽  
J.K. Garbacz ◽  
S. Biniak ◽  
A. Swiatkowski ◽  
A. Dabrowski
Keyword(s):  
Experimental Data ◽  
Electrolyte Solution ◽  
Structural Heterogeneity ◽  
Liquid Mixtures ◽  
Two Component ◽  
Solid Adsorbents

The concepts of Stoeckli as well as those of Wojsz and Rozwadowski have been adopted for describing adsorption from two-component non-electrolyte liquid mixtures at solid adsorbents taking into account structural heterogeneity of the adsorbent. Some new global adsorption equations have been obtained and verified on the basis of experimental data.

Excess molar volumes and viscosities of binary mixtures of some polyethers with propylamine at 298.15 K

2002 ◽  
Vol 80 (5) ◽  
pp. 467-475 ◽  
Author(s):  
Amalendu Pal ◽  
Rakesh Kumar Bhardwaj
Keyword(s):  
Experimental Data ◽  
Viscous Flow ◽  
Binary Mixtures ◽  
Entire Range ◽  
Excess Volume ◽  
Excess Molar Volumes ◽  
Liquid Mixtures ◽  
Molar Volumes ◽  
Binary Liquid ◽  
Volume Viscosity

Excess molar volumes (VmE) and dynamic viscosities (η) have been measured as a function of composition for binary liquid mixtures of propylamine with 2,5-dioxahexane, 2,5,8-trioxanonane, 2,5,8,11-tetraoxadodecane, 3,6,9-trioxaundecane, and 5,8,11-trioxapentadecane at 298.15 K. The excess volumes are positive over the entire range of composition for the systems propylamine + 2,5-dioxahexane, and + 3,6,9-trioxaundecane, negative for the systems propylamine + 2,5,8,11-tetraoxadodecane, and + 5,8,11-trioxapentadecane, and change sign from positive to negative for the remaining system propylamine + 2,5,8-trioxanonane. From the experimental data, deviations in the viscosity (Δln η) and excess energies of activation for viscous flow (ΔG*E) have been derived. These values are positive for all mixtures with the exception of propylamine + 2,5-dioxahexane.Key words : excess volume, viscosity, binary mixtures.

Neat ionic liquids versus ionic liquid mixtures: a combination of experimental data and molecular simulation

2019 ◽  
Vol 21 (42) ◽  
pp. 23305-23309 ◽  
Author(s):  
Andreia S. L. Gouveia ◽  
Carlos E. S. Bernardes ◽  
Elena I. Lozinskaya ◽  
Alexander S. Shaplov ◽  
José N. Canongia Lopes ◽  
...  
Keyword(s):  
Experimental Data ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Molecular Simulation ◽  
Liquid Mixtures

Simple mixtures of ionic liquids (IL–IL mixtures) can become a promising approach for the substitution of task-specific ILs.

A Simplified Approach for Predicting the Intermittent Behavior of Gas-Liquid Mixtures in Pipes

2008 ◽  
Vol 131 (1) ◽  
Author(s):  
M. Fossa ◽  
A. Marchitto
Keyword(s):  
Experimental Data ◽  
Void Fraction ◽  
Computing Time ◽  
Liquid Mixtures ◽  
New Approach ◽  
Pressure Drops ◽  
Simplified Approach ◽  
Intermittent Behavior ◽  
Flow Parameters ◽  
Simplified Procedure

A new approach to the classical slug flow model is here proposed based on an original correlation for the minimum liquid level in the stratified regions of intermittent horizontal flows. This correlation is obtained by fitting experimental data obtained from a statistical analysis of void fraction signals from ring impedance probes. The new procedure improves the original model in terms of computing time reduction and algorithm simplification. In addition, it is demonstrated that the new closure relationship can be derived with more consistent experimental results, with respect to the slug length, which is employed in the original approach. The predictions of the main flow parameters are presented with reference to the classical and new approach, and all the results are critically compared with literature experimental data. It is demonstrated that the simplified procedure is able to predict the pressure drops and average void fraction values in good agreement with experimental measurements, while only the slug frequency and slug length predictions are affected by poor reliability.

On the concentration dependence of surface diffusion coefficients in capillary porous materials

1991 ◽  
Vol 434 (1891) ◽  
pp. 317-340 ◽  
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Pore Size ◽  
Surface Diffusion ◽  
Diffusion Coefficients ◽  
Physical Adsorption ◽  
Structural Heterogeneity ◽  
Size Dependent ◽  
Chemical Potentials ◽  
Uniform Pore Size

The influence of structural heterogeneity, in the form of a non-uniform pore size distribution, on the isotherms and surface diffusion coefficients for monolayer physical adsorption is studied. A pore size dependent langmuirian isotherm is used along with consideration of equality of chemical potentials at the pore mouths at an intersection. The diffusion is modelled by a recently developed random walk formulation. It is found that the surface diffusion coefficients are strongly influenced by the heterogeneity and have a stronger increase with overall coverage than that predicted by the Darken equation. The results are found to match the experimental data of P. C. Carman and F. A. Raal on the diffusion of carbon dioxide in carbon black without the use of a fitting parameter.

Infrared study of adsorption on silica from two-component and three-component liquid mixtures

1978 ◽  
Vol 74 (0) ◽  
pp. 2393 ◽  
Author(s):  
Anthony D. Buckland ◽  
Colin H. Rochester ◽  
Deborah-Anne Trebilco ◽  
Kenneth Wigfield
Keyword(s):  
Liquid Mixtures ◽  
Infrared Study ◽  
Two Component

Paper 15: Critical Conditions during the Flow of Two-Phase Mixtures through Nozzles

1967 ◽  
Vol 182 (8) ◽  
pp. 145-151
Author(s):  
D. Chisholm
Keyword(s):  
Experimental Data ◽  
Water Flow ◽  
Liquid Mixtures ◽  
Critical Conditions ◽  
Sonic Velocity ◽  
Two Phase ◽  
Flow Through

Equations are developed for the flow of gas-liquid mixtures through nozzles under conditions of critical or ‘choking’ flow. The equations are compared with experimental data obtained during air-water flow through nozzles and pipes at almost atmospheric pressures. Comparison is also made with data on the sonic velocity in mixtures. Additional problems arising with vapour-liquid mixtures are also discussed.

scholarly journals The Classical Nature of Thermal Conduction in Nanofluids

2010 ◽  
Vol 132 (10) ◽  
Author(s):  
Jacob Eapen ◽  
Roberto Rusconi ◽  
Roberto Piazza ◽  
Sidney Yip
Keyword(s):  
Experimental Data ◽  
Thermal Conductivity ◽  
Strong Evidence ◽  
Thermal Conduction ◽  
Base Fluid ◽  
Liquid Mixtures ◽  
Large Set ◽  
Conductivity Data ◽  
Homogeneous Systems ◽  
Thermal Conductivity Data

We show that a large set of nanofluid thermal conductivity data falls within the upper and lower Maxwell bounds for homogeneous systems. This indicates that the thermal conductivity of nanofluids is largely dependent on whether the nanoparticles stay dispersed in the base fluid, form large aggregates, or assume a percolating fractal configuration. The experimental data, which are strikingly analogous to those in most solid composites and liquid mixtures, provide strong evidence for the classical nature of thermal conduction in nanofluids.

On the Characteristics of the Pseudogapped Metallic State of High-Tc Superconductors

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3052-3056 ◽  
Author(s):  
Liyuan Zhang ◽  
Xiaoqiang Yang ◽  
Changfeng Chen
Keyword(s):  
Experimental Data ◽  
State Physics ◽  
Solid State ◽  
Theoretical Calculations ◽  
Model Description ◽  
Metallic State ◽  
High Tc Superconductors ◽  
Solid State Physics ◽  
High Tc ◽  
Two Component

The pseudogapped metallic state (PS) in high-T c superconductors (HTS) has distinctive characteristics in comparison with the metallic state in tranditional solid state physics. Through careful analyses of experimental data and theoretical calculations, we have correlated the pseudogap in the density of states with the two-component characteristics in the HTS. We propose seven points as a model description for PS.

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