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