Nitrogen Porosimeter [N2 Porosimeter]
The NOVA e-Series of surface area analyzers offers a full line of rapid, high throughput B.E.T. surface area and pore size analyzers. Eight fully automatic models meet the needs of any research or quality assurance laboratory. |
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BET Surface Area Analyzers
All NOVA models can produce BET surface area results using the classical helium void volume method, or via the patented helium-free method.
Pore Size Analyzers
Every NOVA is also a pore size analyzer capable of measuring both adsorption and desorption isotherms in a few hours, completely unattended.
Operation Superior engineering delivers years of trouble-free surface area analysis and pore size measurement. All process control features are self-contained, enabling the instrument to function independently without operator intervention or external computer support.
Critical Components
- High sensitivity pressure transducer
- High resolution 16-bit A/D converter
- Robust dewar elevator
- Filter gaskets to prevent vacuum system contamination by powdered samples
- Reliable solenoid valves and leak-free (10-9 cc/sec) dosing manifold
- Precision coolant level control
Sample Preparation
Each NOVA offers up to four built-in, microprocessor-controlled degassing stations with independent flow rate selection for each station. Sample preparation may be performed under vacuum or flow conditions with temperature selection from ambient to 450°C.
Results
- Single- and multi-point B.E.T. surface area with Y-intercept, "C" constant, slope and correlation coefficient.
- Adsorption and desorption isotherms.
- B.J.H. pore size distribution calculated from the adsorption or desorption isotherm.
- Total pore volume.
- Sample density.
Results with NOVAWin 2 software
Isotherms: |
User-selectable number of data points at any desired target pressures |
BET Surface Area: |
Single point, multi-point, slope, intercept, "C" constant, correlation coefficient, tabular and graphic format |
Langmuir Surface Area: |
Multi-point, slope, intercept, correlation coefficient, tabular and graphic format |
BJH Pore Size Distribution: |
Volume, area, adsorption, desorption, cumulative, derivative (linear and logarithmic), interpolated, tabular and graphic format |
Dollimore-Heal Pore Size Distribution |
Volume, area, adsorption, desorption, cumulative, derivative Distribution (linear and logarithmic), tabular and graphic format |
Dubinin-Radushkevich Micro Pore Area: |
Slope, intercept, correlation coefficient, average pore size, micropore volume, average adsorption energy, tabular and graphic format |
Total Pore Volume: |
At user-selectable P/P0 |
Average Pore Size: |
Radius, diameter |
Statistical Thickness: |
de Boer, Halsey or Carbon Black models |
t-Method: |
Micropore area, mesopore area, micropore volume, correlation coefficient, tabular and graphic format |
Non-local Density Functional Theory methods (NLDFT)- |
Large library of "kernels" for nitrogen, argon and carbon dioxide adsorbates, in different pore geometries such as cylinders, slits and spheres, at different temperatues from 77K to 273K. |
Other Pore Size Models: |
MP, Horvath-Kawazoe (HK), Dubinia-Astakhov (DA), Saito-Foley (SF), tabular and graphic format. |
GCMC Method: |
CO2 - carbon at 273K based on a slit-pore model |
Fractal Dimensions: |
Neimark-Kiselev (NK), Frenkel-Halsey-Hill (FHH) |