Pressure dependence of diffusion coefficient and effect on plate height in liquid chromatography

1983 ◽  
Vol 55 (14) ◽  
pp. 2302-2309 ◽  
Author(s):  
Michel. Martin ◽  
Georges. Guiochon
Keyword(s):  
Diffusion Coefficient ◽  
Liquid Chromatography ◽  
Pressure Dependence ◽  
Plate Height

A Molecular Dynamics Study on Pressure Dependence of Ag Diffusion in Ag3SI

2010 ◽  
Vol 72 ◽  
pp. 337-342
Author(s):  
Masakazu Yarimitsu ◽  
Masaru Aniya
Keyword(s):  
Molecular Dynamics ◽  
Diffusion Coefficient ◽  
High Temperature ◽  
Pressure Dependence ◽  
Distribution Functions ◽  
Intermediate Temperature ◽  
Β Phase ◽  
Α Phase ◽  
Method Of Molecular Dynamics ◽  
Pair Distribution Functions

The pressure dependence of the diffusion coefficient in the superionic α- and β-phases of Ag3SI has been studied by using the method of molecular dynamics. It is shown that in the high temperature α-phase, the Ag diffusion coefficient decreases with pressure. On the hand, in the intermediate temperature β-phase, the Ag diffusion coefficient exhibits a maximum at around 2.8 GPa. The structural origin of this behavior is discussed through the pressure dependence of the pair distribution functions.

scholarly journals Experimental Observations of the Diffusion Cooling of Electrons in Argon

1975 ◽  
Vol 28 (6) ◽  
pp. 675 ◽  
Author(s):  
T Rhymes ◽  
RW Crompton
Keyword(s):  
Diffusion Coefficient ◽  
Energy Transfer ◽  
Satisfactory Agreement ◽  
Pressure Dependence ◽  
Pressure Range ◽  
Sampling Technique ◽  
Cooling Effect ◽  
Hydrogen Mixtures ◽  
Gas Molecules

The cooling by diffusion of electrons in argon and in argon–hydrogen mixtures has been studied by the Cavalieri density sampling technique. In the case of argon, the measured values of the reduced diffusion coefficient ND varied by more than a factor of two over the pressure range 2–8 kPa. When small quantities of hydrogen were added to the argon, the cooling effect was reduced due to the increased energy transfer between the electrons and gas molecules. For argon, the magnitude and pressure dependence of ND are in satisfactory agreement with the recent calculations by Leemon and Kumar (1975).

scholarly journals The ratio of the lateral diffusion coefficient to mobility for electrons in argon at 294 K

1982 ◽  
Vol 35 (1) ◽  
pp. 105 ◽  
Author(s):  
HB Milloy ◽  
RW Crompton
Keyword(s):  
Diffusion Coefficient ◽  
Pressure Dependence ◽  
Pressure Gauge ◽  
Lateral Diffusion ◽  
Lateral Diffusion Coefficient

An error has been found in the calibration of the pressure gauge used for our experiments. The correction for this error has two consequences: an adjustment of all values in the published Table 1 by an amount ranging from 1.5 % to 0.7 %, and the elimination of the small (<1 %) pressure dependence exhibited by the data in the table and referred to on page 58.

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