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Polimat: Research and development equipment | Adsorption porosimeter

Adsorption porosimeter

Manufacturer / Brand:  Micromeritics

Model:   TriStar II, 3020

Scope of usage: 

BET Surface Area: The BET calculation obtains the sample surface area value by determining themonolayer volume of adsorbed gas from the isotherm data.   Langmuir Surface Area: The Langmuir calculation determines the surface area of a sample by relating the surface area to the volume of gas adsorbed as a monolayer.   

Freundlich: The Freundlich isotherm is an empirical isotherm that is used to model low-pressure adsorption data. It can also be applied to model some micropore isotherms.   

Temkin: The Temkin isotherm is used to model adsorption data where the heat of adsorption drops linearly with increasing coverage.   

t- Plot: The t-Plot calculation allows quantitative analysis of the area and total volume ascribed to micropores.    

Alpha- S Method: The Alpha-S plot converts the standard adsorption isotherm into a dimensionless isotherm using the quantity adsorbed at a relative pressure.    

f- Ratio Method: The f-Ratio report allows you to take the measured isotherm and normalize it.   

BJH Adsorption in BJH Desorption:  The BJH calculation determines the mesopore volume/area distribution which accounts for both the change in adsorbate layer thickness and the liquid condensed in pore cores.    

Dollimore-Heal Adsorption in Dollimore-Heal Desorption:  The options for Dollimore-Heal reports are the same as those for the BJH reports with the exception of BJH Correction and Adsorptive properties; this item is not applicable to DH reports. 

Horvath-Kawazoe:  Select the option in this group box which best represents the physical geometry of the micropores in the sample material.    

DFT Pore Size in DFT Surface Energy:  DFT models are based on the density functional theory. Classical models are based on the Kelvin equation and thickness for determining the pore size distribution.

Examples of application for polymer analysis / information that can be obtained by this method for polymers:  Information on what is the surface of material, how large pores does the material have or how large is its porosity, distribution of pore size between 4 and 4000 Å.

Measurement range:  

Sample limitations: Material must to be dry and pulverized or in pieces large during  2 and 3 mm.

Limitation of application conditions:  No limitations, the device works at normal conditions.

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