This standard specifies the high pressure volumetric isothermal adsorption test method for coal and the treatment method for the equilibrium humidity of coal samples. This standard is applicable to the determination of the adsorption capacity of bituminous coal and anthracite for methane and other gases. GB/T 19560-2004 High pressure isothermal adsorption test method for coal Volumetric method GB/T19560-2004 Standard download decompression password: www.bzxz.net

1s 75.040
National Standard of the People's Republic of China
GB/T19560--2004
Experimental melhud of high pressure isothermal adsorption of coal
Experimental melhud of high pressure isothermal adsorption of coal
adsnrplinn isnthermal L coalCapacity method2004-06-18 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
2004-12-01 Implementation
GB/T 19560-2004
This standard is formulated on the basis of the high pressure isothermal adsorption test equipment and test method currently used in the coal gas industry at home and abroad. Requirement A of this standard is a normative requirement. This standard is proposed and managed by Zhonglian Luan Carbon Gas Co., Ltd. This standard was initiated by: China United Coalbed Methane Co., Ltd., Xi'an Branch of China Coal Science Research Institute.. The main drafters of this standard: Zhang Jueling, Zhang Suian, Cui Yongjun. 1 Standard Park
High-pressure isothermal adsorption test method for coal Volumetric method GB/T19560—2004
This standard specifies the coal charge point pressure volumetric method isothermal adsorption test method and the treatment method of the sample flatness: This standard is used to measure the adsorption capacity of non-combustible coal for alkanes and other gases. 2 Normative referenced documents
The following documents are quoted in this standard and become the relevant clauses of this standard. For all the referenced documents of the specified period, all subsequent amendments (excluding minor revisions) or revisions are not applicable to the technical standards. However, for the latest versions of these documents that have not been received by the parties involved in the standard, all the new versions of the documents shall be used as the main standard. GBT213-201 Coal analysis method (ISO1722:1999) G474-1995 Coal sample preparation method (ISO19:15) 3 Method summary
First, place the coal sample with full moisture content in a dense container, and measure the product of the adsorbed test gas such as alkanes when it reaches the adsorption equilibrium under the same temperature and different pressure conditions: Then, based on the gmuir unit layer adsorption theory, the adsorption constants of the test gas adsorption characteristics in the refining process are calculated through theoretical calculations - I.anRmui: non-product (V.), I.angmuir pressure [product and isothermal adsorption screen,
4 Instruments and equipment
4. T Isothermal adsorption loading
Sample certificate
Test;
Constant temperature control system:
Temperature monitoring system: active temperature sensor (accuracy 0.01M1a), multi-channel high-precision analog-to-digital converter (TI. bit), isothermal monitoring system: including active pressure sensor (accuracy 0.01M1a), multi-channel high-precision analog-to-digital converter (16 bit), data processing system: computer and data processing system. 4.2 Balance humidity determination ※ Equipment
Bai Ben pulp,
Air dryer:
Balance, quantity 0.1mg:
Constant temperature system,
4.3 Sample brushing device
Machine:
Standard sieve.
5 Reagents
5.1 Potassium hydroxide and concentration:
5.2 Alkane gas: 2% 99.9%
5.3 Hydrogen, purity s9.9%
CB/T 19560-2004
5. 4 Distilled water,
6 Preparation of samples
6.1 Sample crystallization and preparation
According to GB4741S96. Relative density 0.25mm--0.18mm (60--30 months). 6.2 Industrial analysis
According to H/T3182001:
6.3 Balance analysis of coal samples
6.3.1 Weigh air-dried coal until it is at least 5.1mg. 6.3.2 Place the standard weight of the coal sample in the center. 6.3.3 Place the sample in a humidity-balanced package. The bottom of the sealed device is equipped with a magnetic hook and a liquid. Weigh it every 211. The weight of the two weighing pans does not change with the weight of the sample. The balance diameter is calculated by the formula
M - (1-G=E]xM. +
Where:
. G
—the average moisture content of the sample, in percentage (g), G
—the mass of the sample after equilibration, in g (g), M—the moisture content of the sample in air, in percentage (g). Test steps
7.1 Sample loading
Weigh the coal sample that has been treated with water content in the sample and quickly load it into the sample cell. 7.2 Air tightness check
7. 2. 1 Fill the system with oxygen and pressure higher than the maximum pressure of the isothermal test by 1 MPa. 7.2.2 Setting and adjusting the system temperature. The sample package should be set at the required temperature or sample unit. 7.2.3 The system should be kept at the required pressure limit of the cylinder and the fiber. If the pressure is level, the system integrity is good. 7.3 Free space volume determination 7.3.1 Setting and adjusting the system temperature System temperature and make the sample stable before the reservoir humidity or the unit requirements. 7.3.2 Inflation
Open the gas system and fill it with hydrogen, make reference to the valve, then close the valve and wait for the pressure to balance and collect a set of data. The self-space measurement is repeated three times, and the interval between the three times is allowed to be 0.cm. 7.3.4 Obtain the volume of the coal sample. Calculate the self-space volume in the sample 7. 4 Isothermal adsorption test
7.4.1 The maximum test pressure is set to 1, 2 times of the reservoir pressure, but the maximum test pressure shall not exceed MP2
7.4.2 When the test pressure is 8MPa, 6 pressure point tests must be carried out. When the test pressure is between 8MPa and 13MPa, 7 pressure point tests must be carried out! When the test pressure is greater than 12MPa: 1 pressure point test must be carried out. 7.4.3 Inflatable
GB/T1 9560--2004
Open the control door and reference door, fill the test system with artificial gas or its super gas, and adjust the reference pressure to the target pressure.
7.4.4 Data acquisition
After reaching the target pressure and the temperature is stable, start the isothermal adsorption test sequence to automatically collect the sample characteristics and phenomena according to the time, pressure, temperature and other relevant data in the cylinder, and record the data as the data file. 7.4.5 Determination of adsorption equilibrium time
Determine according to the actual conditions such as the quality of the sample, the total amount of sample, etc., but it shall not be less than 12. 7.4.6 Repeat 7..1 to 7.4.5, filter each point from low to high, conduct trial acceptance, and directly measure each pressure point test result. 9 Data processing
9.1 Dry sample volume and self-storage space volume calculation
The volume calculation formula of coal sample is:
V-xVizxI+pxViz.xT
PKV/Z, T
P:/2. XTM/ XT
volume of the vehicle, in cubic meter c:
balance piece, in megapascals (MPa);
initial pressure, in megapascals (MP);
initial stress before sample red, in megapascals (MP);
equilibrium standard, in kPa (K), which is related to the temperature (℃) as follows: XT
initial temperature, in kPa (K); initial temperature of the sample, in kPa (K); total volume of the system, in cubic centimeters (cm3);
volume of the sample, in cubic centimeters (m);
balance image The compression of gas under certain conditions is called compression of gas, especially the initial compression of gas in the sample cylinder. The volume of the sample can be obtained by calculating the free space volume inside the sample. The free space refers to the total volume of the air between the sample particles after the sample is put into the sample, the volume of the internal space of the sample particles, the remaining free space between the connecting pipes and the internal space of the network. The free space volume calculation formula is:
.-~-Free space, where V is the total volume of the sample, in cubic meters (cm2); V-the volume of the sample, in cubic meters (m3).2 Calculate the adsorption capacity of each point in time
CB/T195G—2004
According to the equilibrium pressure and temperature of the sample, the adsorption capacity of the same equilibrium pressure point is calculated using the formula:
Where: - Gas pressure, unit is megabar (M); V——Gas volume, unit is cubic meter (mnl); 2 Gas shrinkage factor
R Case gas band number, unit is the rate of injury and <1mol-1K-1) Thermodynamic humidity, unit is Kelvin temperature (K) Calculate the molar amount of gas in the sample before and after each point () The molar amount of gas in the sample after the ring equilibrium) The coal grade gas number is:
Where.
The smell is like a dream, the unit is medical valley
The condition of the gas in the sample cylinder before and after is the scientific balance of the gas in the sample cylinder, the unit is original er.ol). The adsorption volume V of each pressure point and the attached gas volume:
x22.4x:390
The adsorption volume V of each pressure point):
Ves = V./C.
V.-adsorption volume, the unit is cubic centigram (/g), the total volume of the adsorbed gas, the unit is cubic meter (m) G-sample, the unit is point (.
83Calculate V, and
#19\2mrPrinciple:
Formula 10: bzxz.net
Atmospheric pressure, a;
gram/)
V.-amount received. The unit is cubic centigram gLangmui+force, when expressed as megapound (MPn). Let A=1/V. and B=force/V. The process (>Q inflammation/V and P excitation: 31:.
According to the force process (9, the measured pressure at the equilibrium point and the adsorption blood number can be plotted as the collection as the horizontal axis, and the ratio of /V is given as the coordinate point. Use the least square to find the regression line of this point as the process and the core system, and find the straight line B), the center and the load distance are obtained, and the product and I are V: -1/21
8.4 If the overflow is back
Draw the source adsorption curve according to the pressure of each small point V. 9 Test accuracy requirements
GB/I19560·-2C04
9.1 Reproducibility requirements
The relative error of balance humidity reproducibility is not more than 10%V reproducibility relative error is not more than 15:, the relative error of periodicity is not more than 3%.
Reproducibility requirements
The relative error of balance humidity reproducibility is not more than 20:V1 reproducibility relative error is not more than 30%P. The relative error of the current compensation is not more than +25%.
9.3 Sample test quality requirements
The correlation coefficient between P and g/V should be less than 0.08. 10 Test report
15.1 The content of the report shall comply with the provisions of Appendix A. 10.2 Test results and product numbers shall be kept to 4 decimal places. GD/T19560—2004 Test report number Sampling well order Sample weight (a/R Average moisture content M/% Test report KJ/MPa Appendix A (Normative Appendix) Isothermal noise test report format Isothermal love test report Suixiang number 6 Dry ash steam sample result certificate Ammonia embedding: and (em:B) Laugiuuit Equation; Y- Vp/(p-p>
actual multi-effect
air,T some
T dry without basis
experimental person:
Yuaumg!
1anpmitr body e(V,)/rm）
humidity/rn
industry comprehensive tension/%
ten Nier forget
Vse/tar/g?
Iangmir pressure (a./MH
air drying core
ten dry East book
mountain core person,
V/c'/gi
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