BET Suraface Area Analyser

BET Suraface Area Analyser

PHYSISORPTION

The gas adsorption method is one of the important experimental means for characterizing fine particles or porous materials.BELSORP-max, an automatic gas adsorption measuring unit for gas adsorption, vapor adsorption and chemisorption, is designed to measure accurately, quickly the properties of fine particles, such as the specific surface area, pore size distribution and metal dispersion, by easy operation using the gas adsorption method.

SPECIFICATONS

Measurement method	Volmetric gas adsorption method+AFSM TM
Adsorptive	N_{2 ,} Ar, Kr, CO, O _{2 ,} CH₄ , and other non-corrosive gas Steam (A corrosion resistant option is required for adsorption measurement of corrosive gas such as NH 3 and amine, and organic vapor such as CH₃ OH, C₆ H ₆ , etc.)
Number of samples to be measured	Standard mode (P/P 0 = 10^-8 to 0.997): 1 to 3 samples High precision mode (P/P 0 = 10^-8 to 0.997): 1 to 2 samples (according to AFSM TM )
Specific surface area measurement range *	0.01 m² g ^-1 or more (N 2 / 77K) 0.0005 m² g^-1 or more (Kr / 77K)
Pore size distribution (diameter)	0.35 to 500 nm
Pressure sensor	133 kPa 5 units (Accuracy: ±0.25 % of F.S.) 1.33 kPa 2 units (Accuracy: ±0.5 % of R.)(OP. + 1 unit) 13.3 Pa 1 unit (Accuracy: ±0.15% of R.)(OP. + 1 unit)
Pressure resolution	1.6×10^-6 Pa
manifold temperature	40^{o C} (Option 50^{o C})
Dewar vessel	Volume: 2.6 L Holding time: 60 h
Sample cell	About 1.8 cm 3 (Option: 5 cm 3 )
Exhaust system	Turbo molecular pump + Rotary pump Attainable vacuum: 6.7 x 10 ^-7 Pa or less (manufacturer’s specification) (Option: Oil free exhaust system)
Vacuum gauge	Cold cathode gauge (2 x 10^-7 pa to 1 Pa)
Measurement program	Pretreatment and adsorption/desorption isotherm measurement
Analysis program (BELMaster TM )	・ Adsorption /desorption isotherm ・ Specific surface area by Langmuir method ・ Pore volume calculation by DA method ・ Micro-pore analysis by MP method, HK method, and SF method ・ Difference of adosorption method ・ Specific surface area by BET method ・ Meso-Pore analysis by DH method, CI method, BJH method ・ Micro-pore volume and micro-pore diamether by t-method, αs method ・ Equivalence diffential adsorption heat analysis ・ Pore size distribution analysis by the NLDFT/GCMC (BELSim TM ) (Optional)
Auxiliary equipment	Rotary pump displacement: 50 L min ^-16 Attainable vacuum: 6.7 x 10^-2 Pa
Utility	He, absorptive (N 2 , Ar, etc.) : 1/8” Swage lock joint (0.1MPa (G)) Air for valve operation : 1/4” Plastics tube quick connect (0.5 to 0.6MPa (G)) Rotary pump connection port : OD Φ11 mm Hose nipple
Dimension / weight	W565 x H850 x D580 mm, 84 kg (Excluding a vacuum pump and computer related equipment)

*The minimum measurable specific surface area depends on the sample density.

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CHEMISORPTION

To investigate the physical and chemical property of the catalyst surface is essential in catalytic research. For metal-supported catalyst, metal dispersion rate, metal surface area and metal particle size decide the cost and performance of the catalyst. For solid acid catalysts, the number of acid sites and acid strength determine the catalysis performance. A catalytic reaction occurs on the catalyst surface. So the specific surface area is an important factor for the catalysis evaluation.

Various methods are used for the purpose and here are the representative examples;

i ). TPD measurement

ii ). TPO / TPReduction, TPReaction measurement

iii). Pulse chemisorption measurement

iv). BET single point measurement

The BELCAT-series is designed to provide all these methods can be performed with just one unit. The dynamic flow method is applied. Highly-sensitive TCD detects concentration in the gas

stream and the adsorbed amount can be calculated from the concentration change. BELCAT-series has three models with a variety of options. You can choose the suitable one for your purpose.

Each model offers highly accurate and reproducible data with simple operation. The BELCAT will provide useful data to all the researches who are involved in the surface chemistry.

BELCAT-M

The BELCAT-M is the basic model of BELCAT series. The BELCAT-M is a compact and inexpensive instrument but provides a variety of measurements such as pulse chemisorption, TPD,
TPO/TPR and single point BET can be performed. Temperature control and data acquisition can be carried out by a high-resolution interface and the measurement software. Valves and other
parts are put on the front panel in a straightforward allay and that allows intuitive and easy operation.

The BELCAT-M is the basic model of BELCAT series.

The BELCAT-M is a compact and an inexpensive instrument but provides a variety of measurements such as pulse chemisorption, TPD, TPO/TPR and single point BET can be performed. Temperature control and data acquisition can be carried out by a high-resolution interface and the measurement software. Valves and other parts are put on the front panel in a straight forward allay and that allows intuitive and easy operation.

SPECIFICATONS

Measurement principle	Dynamic flow method
Detector	Thermal Conductivity Detector (W-Re filament)
Gas port Carrier / Pretreatment / Pulse Pretreatment / Pulse	2 4
Gas flow control Carrier / Pretreatment / Pulse Pretreatment / Pulse	Needle valve Needle valve
Electric furnace Range Ramp rate [50-500°C]	RT－1200°C� 100°C/min

CENTRAL SOPHISTICATED INSTRUMENTATION FACILITY (CSIF)

CENTRAL SOPHISTICATED INSTRUMENTATION FACILITY (CSIF)

CENTRAL SOPHISTICATED INSTRUMENTATION FACILITY (CSIF)

CENTRAL SOPHISTICATED INSTRUMENTATION FACILITY (CSIF)

CENTRAL SOPHISTICATED INSTRUMENTATION FACILITY (CSIF)

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