Is microporous analysis Nitrogen or Argon? -Huaqiang Electronic Network

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Argon (Argon) has the meaning of "inactive" in Greek, derived from its characteristics, is an inert gas, and is a spherical monoatomic molecule. Nitrogen is a non-spherical diatomic molecule and the quadrupole distance may result in local adsorption, particularly a polar chemical adsorbent. Its chemical symbol is Ar, which has an atomic number of 18. Since the outer orbit of the atom is filled with electrons, it is not susceptible to chemical reactions and is a colorless and odorless gas at room temperature. There are 14 known isotopes of argon, including argon 33-argon 46. Argon accounts for 0.93% of the atmospheric volume and is the third most abundant gas in the Earth's atmosphere. It is also the most inert gas in the atmosphere. Argon and nitrogen are very close in molecular size and heat of adsorption. The boiling point of argon at a standard pressure is 87.29 K, and the boiling point of nitrogen is 77.35 K.

For microporous analysis, argon adsorption at liquid argon temperatures is better than nitrogen or argon adsorption at liquid nitrogen temperatures. Argon gas has a specific effect on the solid surface as an inert gas, and the liquid argon temperature is higher than the liquid nitrogen temperature, which can shorten the equilibrium time. In addition to this, the argon pressure of the filling hole is higher than the nitrogen pressure, making it easier to measure accurately.

Recommended Products:

High-precision three-station side-by-side automatic mesoporous micropore analyzer

Product introduction:

JW-BK300 series high-precision three-station parallel-type automatic mesoporous micropore analyzer, based on JW series aperture analyzer, independently developed a new generation of high-end microporous analyzer. The core hardware of this instrument adopts international advanced brand, equipped with "turbomolecular pump" and pressure sensors of different ranges such as 1000Torr, 10Torr and 1torr. Through the full modular design and accurate application of microporous analysis model, it realizes micro Accurate analysis of the hole, the minimum aperture can be measured up to 0.35nm, the accuracy, accuracy and stability of the test results reach the level of imported similar instruments, the cost performance is very high, very suitable for activated carbon, activated alumina, molecular sieve, zeolite, MOF materials, etc. Research and application of pore nano-powder materials.

Technical Parameters:

Instrument model: JW-BK300 high precision three station side-by-side automatic mesoporous microporous analyzer

Mesoporous micropore analyzer

Principle method: static capacity method, low temperature nitrogen adsorption;

Mesoporous micropore analyzer

Test function: isothermal adsorption desorption curve; single point, multi-point BET specific surface area; Langmuir specific surface area; external surface area (STSA); total pore volume, average pore size; BJH mesoporous pore volume and pore size distribution analysis; Plot method, as-plot method, DR method, MP method micro-well conventional analysis; HK method, SF method micro-hole accurate analysis; NLDFT method pore size distribution analysis; true density test; gas adsorption amount, adsorption heat test; mass input method test ;

Mesoporous micropore analyzer

Test gas: nitrogen, oxygen, hydrogen, argon, helium, carbon dioxide, methane, etc.;

Mesoporous micropore analyzer

Test range: specific surface 0.0005m2 / g to no upper limit, aperture 3.5 Ã…-5000 Ã…;

Mesoporous micropore analyzer

Repeatability: specific surface area ≤ ± 1.0%, pore size ≤ 0.2 Å;

Mesoporous micropore analyzer

Test efficiency: average surface area per 10 min; mesoporous, macroporous analysis average 1-1.5 hours; microporous analysis average 10-16 hours per sample;

Mesoporous micropore analyzer

Analytical station: 3 completely independent sample analysis stations, which can be degassed in the same position;

Mesoporous micropore analyzer

P0 position: 3 completely independent P0 stations, real-time monitoring;

Mesoporous micropore analyzer

Lifting system: 3 sample analysis stations are equipped with 2 sets of independent lifting systems in situ, electric control, automatic control, and no interference with each other;

Mesoporous micropore analyzer

Vacuum system: multi-channel parallel vacuum system, cartridge type modular design, patented technology of vacuum pumping speed adjustment valve system, can be automatically adjusted within the range of 2-200ml/s;

Mesoporous micropore analyzer

Vacuum pump: external imported two-stage rotary vane mechanical vacuum pump (automatic anti-return oil) + built-in imported turbomolecular pump, ultimate vacuum degree up to 10-6Pa;

Mesoporous micropore analyzer

Degassing system: 3 sample analysis stations are equipped with 3 in-situ and in-situ degassing stations: 3 independent heating packages, 3 independent temperature control systems, programmable temperature control, and programmable temperature steps up to 10 steps. Simultaneous configuration of external ectopic 4-station vacuum degassing pretreatment system

Mesoporous micropore analyzer

Degassing temperature: room temperature - 400 ° C, accuracy ± 1 ° C;

Mesoporous micropore analyzer

Pressure sensing: original imported capacitive film multi-pressure sensor, 1000 torr (133.3KPa), 10torr (1.333KPa), 1torr (0.1333KPa) or 0.1torr (0.01333KPa), accuracy ≤ ± 0.15%;

Mesoporous micropore analyzer

Dividing range: P/P0 10-8-0.998;

Mesoporous micropore analyzer

Pressure control: Balanced pressure intelligent control method, pressure controllable interval <0.1KPa, the highest pressure point can be automatically controlled;

Mesoporous micropore analyzer

Data acquisition: Ethernet data acquisition, fast acquisition speed, high precision, compatible with Windows 7/XP 32/64 bit system;

Mesoporous micropore analyzer

Application areas:

● Catalyst material: activated alumina, molecular sieve, zeolite, etc.;

●Environmental protection field: adsorbent such as activated carbon;

● Nanomaterials: nano ceramic powder (alumina, zirconia, yttria, silicon nitride, silicon carbide, etc.), nano metal powder (silver powder, iron powder, copper powder, tungsten powder, nickel powder, etc.), nano high Molecular materials, carbon nanotubes, etc.;

● Coal mining industry: coal, ore, rock, shale gas, coalbed methane, etc.;

● Other materials: microfiber, porous fabric, composite materials, etc.