High Pressure High Temperature Automatic Gas Adsorption 

Analyzer with Vacuum System

Application background

Adsorbent materials (e.g. coal, shale, etc.) often need to know how much gas is adsorbed during the gas storage and separation process, which is often carried out under ultra-high pressure conditions. When testing the amount of adsorption, static capacity equipment is used to check how much gas is adsorbed by the adsorbent material as the pressure changes within a certain volume. Sometimes it is also necessary to observe the adsorption amount of gas adsorbed by the adsorption material under different temperatures and different stress conditions, which is the role of high temperature and high pressure adsorption instrument.

 

Main applications

Hydrogen storage material properties research

Shale gas coal bed methane storage research

High temperature and high pressure gas adsorption research

Supercritical gas properties research

Microporous material adsorption research, etc.

 

Test principle

After the sample is placed in the sample tube, a calibration inert gas (e.g. helium) is first filled to calibrate the volume of the sample and the remaining volume of free space in the sample tube (dead volume), then a certain amount of adsorbent gas is filled into the sample tube (gas injection), and when the adsorption equilibrium is reached, the software automatically records the adsorbed amount at this pressure value. The software automatically records the adsorbed amount at this pressure value when the adsorption equilibrium is reached, and then repeats this operation until the desired maximum pressure value is reached. The adsorption isotherm is obtained by plotting the pressure value against the adsorbed amount.

 

For some samples, the adsorption amount under different temperatures is very different, then we can test the change of the adsorption amount of the sample at different temperatures according to the user's actual needs.

 

For all these complicated operations, the BSD-PH series of high temperature and high pressure gas adsorption instrument has been fully automated, and automatically carry out complex data model processing, to give the sample on the adsorbent high temperature and high pressure adsorption performance evaluation!

 

Main function

Volumetric method high temperature, high pressure adsorption and desorption isotherms;

Adsorption, desorption t-P/t-V curves;

PCT adsorption and desorption isotherms;

Langmuri adsorption constant a, b values;

Freundlich adsorption strength n, adsorption constant k;

 

Optional function 1: normal pressure desorption rate analyzer (BSD-PHDM), testing 3~10S initial rate of desorption; final value of desorption rate; desorption rate curve.

 

Option 2: Constant pressure adsorption rate test, program temperature rise desorption test (BSD-PHE).

 

Option 3: High-pressure volumetric multi-component adsorption (BSD-PHM), equipped with a high-pressure micro-circulation system, to solve the problem of multi-component adsorption gas stratification.

 

 

High Pressure Gas Adsorption Meter & Liquid Nitrogen Surface Constant System

For high pressure gas adsorption evaluation at 77K

 

Selection Guide

BSD-PH Series Gas Adsorption Analyzer at High Temperature and High Pressure
Series	BSD-PH			BSD-PHU
Model number	PH2001	PH2002	PH2004	PHU5001	PHU5002	PHU6901	PHU6902
Test pressure range	0-200 bar			0-500 bar		0-690 bar
Number of analysis bits	1	2	4	1	2	1	2
In situ degassing	have			have		have
Independent degassing level	2	2	/	2	2	2	2
Pressure sensor	10bar+200bar			40bar+500bar		40bar+700bar
Test function	Standard functions: Volumetric method high temperature and high pressure adsorption and desorption isotherms; adsorption and desorption t-P/t-V curves; PCT adsorption and desorption isotherms; Langmuri adsorption constant a and b values; Freundlich adsorption strength n, adsorption constant k; IAST theoretical model multicomponent competitive adsorption curve; Clausius-Clapeyron adsorption thermal desorption thermal curve. Optional function: Option 1: 3~10S initial desorption rate; final value of desorption rate; desorption rate curve. Constant pressure desorption rate analyzer (BSD-PHD) Optional function II: constant pressure adsorption kinetic curve, program temperature rise desorption test. High pressure gas adsorption and constant pressure adsorption rate analyzer (BSD-PHE) Optional function III: adsorption penetration curve, adsorption amount penetration curve, adsorption rate penetration curve. High-pressure volumetric multi-component adsorption meter (BSD-PHM)
Sample tube	Stainless steel sample tube: 2mL R5mL (standard) £25mL Sample tube for core: Φ25.4×50mm £Φ50×110mm £Φ38.1×100mm Other specification sample tubes are customized
Filling rod	Standard sample tube filler bars with filtration to minimize dead volume while avoiding contamination of instrument lines from sample extraction.
Temperature range	Select different thermostatic sources (-196 to 1100°C) according to different test temperatures. Optional: £ Dewar's cup: -196 to 0°C £ Thermostatic bath: -5～85℃ R Constant temperature furnace: room temperature～300℃ (standard) £ Constant temperature furnace: 300～1100℃ (customized)
Test gas	H2、CH4、Ar、CO2、N2、Kr、O2、C2H6、C2H4、He, etc.
Constant temperature of instrument	Instrument internal full constant temperature (air bath), manifolds, valves and gas source, etc., in the same air bath environment, constant temperature 40.0 ℃, temperature control accuracy ± 0.1 ℃.
Test accuracy	Repeatability error is less than ±3%.
Pressure accuracy	Imported high-precision pressure sensor, accuracy 0.01%FS, long-term stability 0.025%FS
Preconditioning	Degassing system and analyzing system run completely independently without interfering with each other, and the degassing station has an independent timing function, which can support sample degassing at different temperatures and different times synchronized with the test; With "ordinary heating and vacuum molecular diffusion mode" and "molecular replacement mode" two optional functions.
Anti-pumping	The original vortex dust reduction principle of the hardware anti-pollution device, combined with the software anti-pumping program completely eliminates the volatile samples in the high vacuum when the phenomenon of boiling Yang dialysis, thus avoiding the volatiles contaminate the valve pipeline.
Anti-pollution	The original vortex dust reduction principle of non-blocking anti-pollution device, combined with the software anti-siphoning program to completely eliminate the volatile samples in the high vacuum when the phenomenon of boiling Yang dialysis, so as to avoid contamination of the valves and pipelines caused by the decline in the system tightness of the situation.
Dead volume test	With He gas dead volume test function; with density extrapolation method, for the known true density of the specimen, the dead volume to obtain more accurate, more efficient testing.
Warm zone test	With program control He cold and hot zone temperature zone test function.
True density test	With He true density test function, high test accuracy, good repeatability
High pressure gas path system	All stainless steel gas line system, the manifold is BEST manifold, the remaining small amount of piping is imported 316L stainless steel piping. The high integration and anti-interference ability of the manifold system can effectively reduce the dead volume space and effectively improve the stability and service life of the instrument.
	20MPa high pressure gas line system connectors with VCR hard connection, 316L stainless steel tubing, system pressure tested to 35MPa. All-metal VCR hard connection can realize safe, reliable, easy to install or dismantle the pipeline quick connection.
	69 MPa ultra-high-pressure gas line system fittings are hard-wired with ferrule fittings, 316L stainless steel tubing, and the system is pressure tested to 100 MPa.
	The vacuum leakage rate is <5*10-5 Pa-L/S by Infocon Helium Leak Detector before the instrument is shipped out from the factory, so that the gas tightness of the instrument is fully guaranteed.
Control system	The valve adopts high security, high pressure resistant all imported 316 stainless steel high pressure pneumatic valve, which can realize the automatic on-off control within the pressure range of 20MPa or 69MPa, and the service life is up to 500 million times.
Vacuum system	Instrument degassing system and analyzing system are independent of each other, avoiding the problem of mutual contamination caused by sharing a set of gas circuit system. Bipolar direct-connected vacuum pump, the vacuum degree reaches 10-2Pa; Molecular pump system can be optional, the ultimate vacuum reaches 10-8Pa; the whole process software automatically controls the start and stop of the pump.
Safety measure	High safety, the use of pneumatic valves, no solenoid valve, high-performance explosion-proof level; the instrument inside and outside the two high-sensitivity combustible gas detection alarms, detection limit better than 3% LEL. analysis position with a protective cover, completely eliminated due to the high temperature of the experimental operators caused by the injury; more importantly, effectively eliminate the external airflow changes on the test, greatly improving the instrument's testing accuracy and stability. More importantly, it effectively eliminates the influence of external airflow changes on the test, greatly improving the instrument's testing accuracy and stability.
Instrument specification	Size: 72cm×50cm×85cm Net weight: 55Kg Voltage: AC220 V±5%, max power <2 KW
Data analysis	Equipped with data analysis system, it can set the test pressure point of the system, collect the parameters such as instantaneous pressure point, equilibrium pressure point, adsorption/desorption time, adsorption/desorption amount and desorption rate, draw isothermal adsorption curve and desorption kinetic curve as well as the curve of time, desorption rate, and desorption amount, and calculate the adsorption constants a and b by using the method of least squares, and record the initial rate of desorption and the final value of desorption.
Power off automatically saves the current data	Super stability, even if accidental power failure, disconnection, will not lose the current data, and the experiment can be restored to continue.
Tightness self-test	Advanced intelligent self-test process, intelligent judgment of the sample tube is installed, test tube jacket is tightened with or without air leakage.
Humanized operation interface	Clear image of the graphical control interface, and all hardware control operations can be performed on the interface.
High intelligent working mode	Interactive data processing software can realize fully automatic operation of the instrument, long-time experiments completely without human guards, can realize automatic testing at night, and can be customized according to the user's needs for the content of the report.

 

Model	Function
BSD-PH High Pressure Gas Adsorption Instrument	0-20MPa, 1/2/4 analysis positions
BSD-PHU Full-automatic ultra-high pressure gas adsorption meter	Ultra-high-pressure configuration (0-50MPa, 0-69MPa), suitable for shale gas, coal bed methane, high-pressure adsorption of hydrogen storage of high-pressure adsorption research, for the international scope of the highest test pressure of the automatic gas adsorption instrument
BSD-PHUO Full-automatic Ultra-high Pressure Gas Adsorption Tester	Especially suitable for the evaluation of the adsorption characteristics of "high pressure, high temperature and low adsorption capacity" of shale coal rock above 50MPa.
BSD-PHE High Pressure Gas Adsorption and Constant Pressure Desorption Rate Tester	Replace the high pressure adsorption of magnetic levitation balance weight method, realize the constant pressure adsorption kinetic analysis of volumetric method. Optional TPD program heating desorption module, hydrogen adsorption and release kinetic test, TPD program heating desorption rate and platform temperature. Option to increase the liquid discharge gas collection function
BSD-PHD high pressure gas adsorption and constant pressure desorption rate meter	Test 3~10S desorption initial rate, desorption rate final value, desorption rate curve.
BSD-PHC Multi-component High Pressure Gas Adsorption Meter	The axial and radial forces are applied to the whole core and coal core to simulate the stratum stress environment and evaluate the adsorption performance of the core and coal core under high stress, which significantly improves the accuracy of reserve assessment.
BSD-PHM Multi-component High Pressure Gas Adsorption Meter	Volumetric method multi-component selective competitive adsorption function, equipped with high-pressure micro-circulation system, to solve the problem of multi-component adsorption gas stratification.

 

Testing report

 

 

Adsorption isotherm test

 

 

Excess adsorption + absolute adsorption (fit) test

 

 PCT platform test

 

 

Adsorption kinetics curve at constant pressure

 

 

 

Temperature programmed desorption (TPD) test report

 

 

 

Auto cycle - adsorption cycle life evaluation

 

Cycles - hydrogen absorption capacity change curve

 

 

Cycles - hydrogen absorption and discharge capacity change curve

 

Related Papers Published