Physical basis underlying the theory of polymolecular adsorption films and of capillary condensation of polar liquids

1973 ◽  
Vol 24 (3) ◽  
pp. 330-334
Author(s):  
V. A. Zagoruiko
Keyword(s):  
Capillary Condensation ◽  
Physical Basis ◽  
Polar Liquids ◽  
Polymolecular Adsorption

scholarly journals Study of loose bulk cargo storage conditions and water transportation

2021 ◽  
Vol 326 ◽  
pp. 00036
Author(s):  
Tatyana Novikova ◽  
Alla Stikhova ◽  
Tatyana Zhmyrko
Keyword(s):  
Moisture Content ◽  
Scientific Literature ◽  
Capillary Condensation ◽  
Analytical Description ◽  
Storage Conditions ◽  
Smooth Transition ◽  
Mineral Fertilizers ◽  
Polymolecular Adsorption ◽  
Porous Bodies ◽  
Water Transportation

When transporting such cargos as mineral fertilizers by water, they absorb moisture, which stimulates cargo self-heating and ultimately leads to dangerous temperature limits. When transporting ANP fertilizer in holds, its equilibrium moisture content can change significantly, which can lead to the cargo damage. The article presents the findings on the processes of hydrothermal moistening of porous bodies on the example of ANP fertilizer associated with the phenomena of sorption and desorption. There is no analytical description of moistening processes of porous bodies associated with these phenomena in the scientific literature. The optimal conditions for storage and transportation of bulk materials have been determined on the example of ANP fertilizer transported through the Novorossiysk seaport. As a result of the study, the moisture content intervals associated with various types of absorption were established. Thus, in the range of ⱷ from 0% to 16% moisture content, monomolecular adsorption prevails, which corresponds to the normal moisture content of ANP fertilizer. In the range of ⱷ from 16% to 54%, polymolecular adsorption predominates, and at the value of ⱷ greater than 87%, a smooth transition from predominantly polymolecular adsorption to capillary condensation occurs, which will negatively affect the process of humidification and cargo caking.

The physical basis of mind.

1877 ◽  
Author(s):  
George Henry Lewes
Keyword(s):  
Physical Basis

The Physical Basis of Heredity

1922 ◽  
Vol 126 (3) ◽  
pp. 177-178 ◽  
Author(s):  
James B. Kelly
Keyword(s):  
Physical Basis

General Cluster Sorption Isotherm

2020 ◽  
Author(s):  
Christoph Buttersack
Keyword(s):  
Density Functional ◽  
Capillary Condensation ◽  
Cluster Formation ◽  
Full Range ◽  
Full Description ◽  
Cross Sectional ◽  
Macroporous Silica ◽  
Isotherm Equation ◽  
Type Iv ◽  
Classical Thermodynamics

<p>Adsorption isotherms are an essential tool in chemical physics of surfaces. However, several approaches based on a different theoretical basis exist and for isotherms including capillary condensation existing approaches can fail. Here, a general isotherm equation is derived and applied to literature data both concerning type IV isotherms of argon and nitrogen in ordered mesoporous silica, and type II isotherms of disordered macroporous silica. The new isotherm covers the full range of partial pressure (10<sup>-6</sup> - 0.7). It relies firstly on the classical thermodynamics of cluster formation, secondly on a relationship defining the free energy during the increase of the cluster size. That equation replaces the Lennard-Jones potentials used in the classical density functional theory. The determination of surface areas is not possible by this isotherm because the cross-sectional area of a cluster is unknown. Based on the full description of type IV isotherms, most known isotherms are accessible by respective simplifications. </p>

Sign in / Sign up

Export Citation Format

Share Document