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Dynamic Nitrogen Adsorption Specific Surface Area Analyzer

Outline

Surface DX-01 is a fully automated gas sorption analyzer with four parallel operating analysis stations for rapid specific surface area determination. The analyzer operates without a vacuum system but works with the dynamic principle (flow method). Reference measurements can be carried out reliably and in very short times suitable for production and quality control. Use of reference comparison methods keeps the detection time of adsorption peaks extremely short.

 

Brochure

Features

Patent of Invention

Experimental report comes from the detection of adsorption peaks. Using this method could avoid test deviation caused by the incomplete desorption of samples. It’s suitable for measurements of low surface area materials, such as ternary materials, positive electrode, and negative electrode (Patent No. 20140320453.2.)

JWGB Sample Preparation Device

It’s optional. External sample preparation device with four-degas stations can remove adsorbed contaminants from surface and pores of samples with heating in flowing gas/vacuum. Temperature can be set and controlled from ambient to 400 oC.L

Low Form Dewar Flasks

Long-life and high volume (1L) Dewar flasks assure a constant thermal profile along the length of sample tubes during experiment.

Adsorption Peak

Adsorption peak looks sharp, no trailing phenomenon, the change of nitrogen concentration caused by each sample adsorption is not diluted at all; the sensitivity of the sample test is greatly improved. The test efficiency is greatly improved under the condition of sufficient adsorption and the comparative test of four samples in one time only needs about 15 minutes.

Anti-pollution Technique

A built-in anti-pollution unit is used to Prevents samples from being blown into the instrument pipeline, ensuring cleanliness of instrument.

Nitrogen Partial Pressure Automatic (only for BET Analyzer)

Using a 70ml/min and 30ml/min precision mass flow controllers to automatically adjust the partial pressure of nitrogen in BET surface area test.
The stability and accuracy of the flow of gas passing through the sample surface could be ensured. (Patent No. 2517307)

Calibration System

Using electromagnetic valve to automatically control calibration system which is advanced and broken the traditional six-line valve control limitations. (Patent No. 2508179)

Analysis Station

All analysis ports (4) can be controlled individually achieving high efficiency and ensuring the parallelism of test results. The repeatability of test results is better than ± 1.0%.

Convenient Operation and User-friendly Design

Operation of Surface DX:
Adsorption process is dynamically displayed on test interface. It’s easy to monitor the flow of nitrogen and helium real time which is convenient to learn about whole process. External sample preparation devices equip miniature vacuum pump and heating furnace; the temperature of furnace is in the range of 400±1oC. Transferring sample after degassing from furnace to analyzer, users can start test.

Specific Examples

Test of small specific surface area samples with dynamic method

Specific surface area of electrode materials with dynamic method

Specification

Type Surface DX Surface DA
Test principle Low temperature nitrogen adsorption, dynamic method Distinction Adventurous adsorption technique Traditional desorption technique Recording adsorption data, same as static volumetric method. Separate analysis stations are suitable for testing sample with low surface area (< 10 m2/g). Recording desorption data, analysis stations are not mutual independence but parallel. It is not suitable for accurately measure sample with low surface area (less than 10 m2/g) illustrated by gentle peak.
Test Method Reference method; Single point BET; Multi-point BET. Reference method; Single point BET; Multi-point BET.
Adsorbate and Carrier Gas High purity nitrogen (99.999%); High purity helium (99.999%). High purity nitrogen (99.999%); High purity helium (99.999%).
Range of P/P0 0.3 (Reference method) N/A
Range of Testing Specific Surface Area 0.01 m2/g to the infinity; (It is not suitable for detecting micropore materials). N/A
Repeatability Typically better than ±1.0% (carbon black) Typically better than ±1.5% (carbon black)
Analysis Stations 4 4
Efficiency 5 min per sample (reference method); 25 min per sample (multi-point BET) 9 min per sample (reference method); 30 min per sample (multi-point BET)
Overall Dimension Depth: 610 mm; Width: 460 mm; Height: 680 mm; Weight: 48 kg. N/A
Ambient Temperature 15-40 °C N/A
Relative Humidity 30%-60% N/A
Electrical Supply AC220V±20V, 50-60 Hz, maximum power300 W; N/A

Specification

Applied Field Typical Materials Details
Material Research ceramic powder, metal powder, nanotube According to surface area value of nanotube, hydrogen storage capacity can be predicted.
Chemical Engineering carbon black, amorphous silica, zinc oxide, titanium dioxide Surface area of carbon black is one of the important factors affecting the reinforcement performance of rubber products.
New Energy lithium cobalt, lithium manganate Increasing surface area of electrode can improve electrochemical reaction rate and promote iron exchange in negative electrode.
Catalytic Technologies active alumina oxide, molecular sieve, zeolite Active surface area and pore structure influence reaction rate.

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