betSpecific surface area meter

JW-DXDynamic adsorption of typebetSpecific surface area meter,JW***The innovative structure allows each sample to adsorb separately without interfering with each other, with sharp adsorption peaks and greatly improved sensitivity. By directly comparing the adsorption peaks, the specific surface area can be obtained, which is accurate and stable for testing. The lower limit of the specific surface area is reduced by one order of magnitude, making it very suitable for the detection of battery positive and negative electrode materials, especially small specific surface materials such as graphite.
(* * * Number).2）

betPerformance parameters of specific surface area meter:

Instrument model:JW-DX betSpecific surface area meter

Principle and method: Flow chromatography, low-temperature nitrogen adsorption, and room temperature desorption;

Testing function: Direct comparison method for surface area;

Test gas: High purity nitrogen gas（99.999%）+High purity helium gas（99.999%）Mixed gas;

Test scope: specific surface0.01m2/gUp to no limit;

Repetition accuracy: Specific surface area≤± 1.0%；

Testing efficiency: Average per sample5minThe test results are automatically obtained in real-time by the software;

Analysis Station: 4One;

Lifting system: 4In situ setting of sample grade4Set up an independent lifting system, electrically controlled and automatically controlled, and do not interfere with each other;

Vacuum pump: Extreme vacuum: 100Pa；

Degassing system: Modular design of ectopic vacuum degassing pretreatment system, which can be carried out simultaneously4Degassing treatment of individual samples;

Degassing temperature: room temperature—400℃±1℃；

Voltage division range:P/P0by0.3or0.4；

Pressure control: Conduct adsorption and desorption experiments under normal pressure, fully automated control;

Data collection:USBOral data acquisition card andA/DConverter, fast acquisition speed, high accuracy, compatibleWindows 2000/XP 32Positional system;

betProduct features and advantages of specific surface area meter:
●Dynamic surface area measurement,JW***(* * Number).2）By using adsorption peaks, the testing process is simplified, completely avoiding errors that may arise from incomplete sample desorption;
●The instrument is equipped with4An independent analysis position that can be conducted simultaneously4Rapid determination of specific surface area of a sample, measurement range0.01m2/g-500 m2/gEspecially suitable for testing small surface samples;
●Each sample is independently adsorbed, achieving interference free and differential testing of multiple samples, fully ensuring the parallelism of the test results from the four sample stations; Test repeatability accuracy≤± 1.0%；
●Each sample gas path is directly connected to the thermal conductivity detector, which is not diluted by other gas paths. The adsorption peak is sharp and the sensitivity is greatly improved, making it very suitable for the determination of small surface area samples;
●The internal pipeline connection method of the instrument adopts a quick plug joint connection, which is convenient, fast, durable, and leak proof, fully meeting the requirements of dynamic chromatography method and surface area testing under normal pressure, with humanized design;
●Adopting a thermal conductivity cell detector constant temperature system to ensure the stability of test results and greatly reduce measurement errors;
●The independently developed fully automatic data acquisition and processing software is advanced and simple, with extremely convenient operation, pioneering and epoch-making!
●Instrument specification: Long610mm×wide360mm×high690mm,Weight approximately30Kg；
●Power requirements: AC220V±20V，50/60HZ，power300W；

Optional parameters for the deaerator:
1. Degassing station:4Station;
2. Degassing temperature: room temperature—400℃±1℃；
3. Vacuum pump ultimate vacuum:100Pa；
4. Specification: Long400mm×wide300mm×high550mm,Weight approximately10 Kg；
5. Power requirements: AC220V±20V，50/60HZ， power300W；

betApplication areas of specific surface area meters (highly recommended)
●Battery materials: positive and negative electrode materials such as lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, graphite, ternary materials, etc;
●Other small surface materials such as pharmaceutical excipients;

Technical Tips:

The specific surface area and pore size of excellent activated carbon have the following characteristics:

　　1Has a large specific surface area. The specific surface area of activated carbon is usually above several hundred square meters per gram, exceeding1000㎡/gThe samples are easily obtainable. The large specific surface area provides the conditions for adsorption capacity.

　　2.Has a developed pore structure. The volume of micropores can often reach0.2-0.6cm?/ gDue to the size of the micropores being close to the same number as the size of the molecules, the adsorbed molecules are subjected to the superimposed adsorption force of the surrounding pore walls, resulting in a large adsorption capacity, The adsorption capacity is equal to the volume of micropores. The adsorption mechanism of this microporous adsorbent is called microporous filling

　　3.Activated carbon has a microcrystalline group composed of hexagonal arranged network planes of carbon and an irregular carbon structure, which gives it a strong dispersion force on adsorbed molecules.

　　4.Due to its insolubility in general solvents and stability at room temperature, activated carbon has excellent chemical stability, acid and alkali resistance.

　　5.Like other commonly used adsorbents, activated carbon also has the advantages of certain mechanical strength, easy regeneration, and lower production cost.