Automatic Isothermal Adsorption Analyzer

Isothermal Adsorption Process

1. Lifting Samples

Pretreatment of the coal sample is accurately weighed and quickly into the model. Sample weight: about 2kg. Industrial analysis implements are in accordance with GB/T212991 of coal sample industrial analysis method.

2. Air Tightness Inspection

2.1 Air Inflation

Filled with Helium to system, the pressure is higher than highest pressure 1MPa of isothermal adsorption experiment. System temperature is adjusted to reservoir temperature. Continuously observe for the system seal condition if good, go to next experiment.

3. Free Space Volume Measurement

3.1 Temperature

System temperature is adjusted to reservior temperature.

3.2 Inflation

Open the cylinder, inflate Helium gas to system, adjust standard pressure valve, and then close the standard room valve.

3.3 Data Acquisition

Open the valve of standard room and sample cylinder, collect the data after pressure balance, do the volume experiment twice. The allowable error is ±0.1cm3.

3.4 Calculate the coal volume and get the blank volume of sample room

4. Isothermal Adsorption Experiment

4.1 Ensure Experiment Pressure

The highest experiment pressure is set up to 1.2 times of reservoir . The minimum pressure is 8MPa.

4.2 Experiment Pressure Spot Distribution

When highest pressure is lower than 8MPa, choose 6 experiment spots; Highest pressure between 8MPa to 12MPa, choose 7 experiment spots; Highest pressure >12MPa, choose 8 experiment spots.

4.3 Inflation

Open regulated valve and standard room Valve, inflate methane to system and adjust the standard room pressure to ideal pressure.

4.4 Data Collection

After get the ideal pressure and stable temperature, start the data collection of the isothermal adsorption experiment program.

4.5 Ensure Time of Adsorption Balance

More than 12 hours at least

4.6 Repeat

Step 3-5 until the end of experiment.

Main Performance Index and Parameter
Parameter
Temperature	Room Tem -100℃
Operation Pressure	40MPa
Maximum Pressure	70MPa
Sample Cylinder, Reference Cylinder
Sample Particle Size	≤60um
Sample Weight	200g
Reference Cylinder Volume	150ml
Reference Cylinder Quantities	6pcs OD: 70mm Length: 330mm
Sampler Cylinder Volume	150ml
Material	Stainless Steel
Pressure Seal	Specified Metal Ring Seal
Stressor	Gas Booster Pump
Pressure Device	Air Compressor
Thermostat
Oil Bathpan	60L*3pcs
Oil Bathpan Size	500mm(Length)*480mm(width)*240mm(depth)
Temperature Setting	Independent Zones
Oil Bathpan Circulation	Internal Installation
Constant Temperature Oil	with it
Pressure Acquisition
Pressure Sensor	Three Wire Pressure Sensor
Pressure Range	0-40MPa
Related Pressure	40MPa
One-piece Brometer	Precision±0.1%
Quantity	12pcs
Output	3mv/v
Temperature Acquisition
Temperature Detection System	Temperature Sensor±0.1℃
Multi-channel Digital Converter Precision	16
Gassource
Aggregate Supply	3
Gas Input	Methane Helium Carbon Dioxide
Pressure	20MPa
Stability	3%
Electric Gas Regulator
Aggregate Supply	3
Pressure	40MPa
Stability	1%
Input	0-10v
Booster Pressure	0.6MPa
Computer Control
Computer	Basic Frequency0.3GHz
	Internal Storage 1GB, Hard Disk: 160GB
Auto Control	Computer
System Software	FINESORB-ISO Data Acquisition Software
	FINESORB-ISO Adsorb/Desorb Data Processing Software
	Multicomponent Gas Adsorb/Desorb Data Processing
	Software