Specific surface area and pore size analyzer, fully automatic porosity detector

1Specific surface area and pore size analyzer, fully automatic porosity detectorInstrument Introduction:

Specific surface area and pore size analyzer, fully automatic porosity detectorCompliant with international standards such as ISO9277, ISO15901, and national standards such as GB/T19587, the adsorption process is tested using the static capacity method through mass balance equations, static gas equilibrium, and pressure measurements. The testing process is conducted at liquid nitrogen temperature. When a known amount of gas is injected into the sample tube through a branch, it will cause a pressure drop. Therefore, the molar mass of the adsorbed gas at adsorption equilibrium can be calculated. By measuring the equilibrium adsorption capacity, the theoretical model is used to determine the single point and multi-point BET specific surface area and Langmuir specific surface area of the tested sample; Volume and area distribution of BJH mesopores and macropores, total pore volume; T-plot micropore volume and surface area, Dubinin Astakhov micropore distribution, Horvath Kawazoe, SF micropore distribution, MP micropore distribution; Non local density function theory (NLDFT) and Monte Carlo (GCMC) aperture distribution model parameters.

model1010102010301001

aperture3.5 to 5000 angstroms (0.35-500nm)

Testing principleLow temperature nitrogen physical adsorption (static capacity method)

Adsorbed gasNon corrosive gases such as nitrogen (default) and helium

specific surface area0.0005 ㎡/g to no upper limit0.0001 ㎡/g to no upper limit

P/P0 range1×10-6―0.9981×10-8―0.998

vacuum pumpImported two-stage mechanical pumpImported two-stage mechanical pump+diffusion pump or molecular pump

ultimate vacuum1.0x10-4Torr1.0x10-6Torr

Imported pressure sensor3 with an accuracy of 0.1%4 with an accuracy of 0.1%6 precision 0.1%4, with an accuracy of 0.1%

Analysis Station1 piece2 of them3 of them1 piece

Degassing station3 of them

◆ Modular air circuit design

The fully automatic surface area and porosity analyzer has been introducedDesign concept, adopting a unique modular all stainless steel vacuum gas path design andAnti leakage and pollution-free measures ensure the realization of high vacuum, avoiding the disadvantage of easy leakage due to too many connecting pipeline joints.

◆ Constant temperature

The independently developed metal Dewar flask, due to its unique internal structural design, ensures a constant temperature of the tested sample while avoiding the fragility and inability to move of glass Dewar flasks.

◆ High precision sensors

Multiple high-precision sensors and 22 bit AD conversion devices ensure the accuracy of specific surface area and aperture calculations.

◆ Operational automation

The adsorption and desorption processes are all computer-controlled and do not require manual operation

2、 Technical features:

Single point and multi-point BET specific surface area, Langmuir specific surface area

Volume and area distribution of mesopores and macropores in lBJH, total pore volume

LT - plot micropore volume and surface area

Distribution of Dubinin Astakhov micropores

Lovath Kawazoe, SF micropore distribution

LMP micropore distribution

Density Function Theory (NLDFT) and Monte Carlo (GCMC) Aperture Distribution Model

True density test

3、 Technical parameters:

1. Specific surface area: 0.0001 ㎡/g to no upper limit

2. Aperture analysis range: 3.5 to 5000 angstroms

3. Test principle: Low temperature nitrogen physical adsorption (static capacity method)

4. Adsorbed gases: Non corrosive gases such as nitrogen (default) and helium.

5. Independent P0 saturation pressure test tube, P/P0 range 1 × 10-8-0.998

6. Pressure and temperature measurement:

ImportPressure sensor 0-120KPa, accuracy 0.1%, 2 pieces

Imported pressure sensor 0-1KPa, accuracy 0.1%, 1 piece

Imported pressure sensor 0-100Pa, accuracy 0.1%, 1 piece

Temperature sensor: PT-100, accuracy 0.1 degrees, 1 unit

7. Dewar flask: 2L, vacuum stainless steel.

8. Vacuum pump: imported two-stage mechanical pump+diffusion pump or molecular pump

9. Ultimate vacuum degree: 1.0x10-6Torr

10. Measurement software: determination of adsorption/desorption isotherms

11. There is one analysis station and three degassing stations, with a degassing temperature of up to 400 ° C. The three degassing positions are located in the same soft heating package, and the analysis position is not used as a degassing position.

Output report:

Directly print and EXCEL output adsorption desorption isotherms, BET specific surface area, Langmuir specific surface area, t-plot micropore volume, BJH pore volume, pore area, total pore volume, total pore area, Dbinin Astakhov, Horvath Kawazoe micropore distribution, NLDFT/GCMC pore distribution, and review report.

5、 Application scope:

Research and product testing of various materials, including measuring zeolites, molecular sieves, silica, alumina, soil, clay, catalysts, organic metal compound skeleton structures, and other materials.