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Method for determining adsorption phase density of adsorbate gas on adsorbate

A technology of adsorbate and adsorbed phase, applied in the field of shale gas exploration, which can solve the problems of unconsidered and high cost of magnetic levitation balance

Active Publication Date: 2016-12-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

This scheme has the following disadvantages: the density of the adsorption phase is taken as a fixed value, and the influence of conditions such as temperature and pressure is not considered
The disadvantage of this scheme is that the magnetic levitation balance of the gravimetric isothermal adsorption instrument is extremely expensive

Method used

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  • Method for determining adsorption phase density of adsorbate gas on adsorbate
  • Method for determining adsorption phase density of adsorbate gas on adsorbate
  • Method for determining adsorption phase density of adsorbate gas on adsorbate

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Embodiment Construction

[0050] The experimental methods used in the following examples are conventional methods unless otherwise specified.

[0051] The materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified.

[0052] according to figure 1 The flow chart shown measures the adsorbed phase density of methane on shale.

[0053] Step 1: Use He to test the free volume in the sample cell

[0054] Such as figure 2 As shown, ①Put the sample into the sample cell, open valve 1, valve 2 and valve 3, and vacuumize the system. ② Close valve 1, valve 2 and valve 3, inject He into the reference cell to obtain P R1 . ③ Open valve 1 and valve 2, so that the helium in the reference cell and the sample cell reaches equilibrium, and get P eqR1 and P eqR2 , and in principle they are equal. ④ Open valve 1 and valve 2 to exhaust the gas.

[0055] According to the conservation of matter, the total amount of sum before and after equilibrium remains u...

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Abstract

The invention discloses a method for determining the adsorption phase density of adsorbate gas on an adsorbate. The method disclosed by the invention is used for determining the adsorption phase volume and the adsorption phase density from the point of view of an experiment, not for optimizing and gaining the parameters from the point of view of mathematical optimization. In the conventional optimization method, a certain assumption on the adsorption phase volume or adsorption phase density is required to be made or an assumption that the adsorption phase volume does not vary with temperature and pressure or the adsorption phase density does not vary with temperature and pressure is made. In the method disclosed by the invention, the assumption on the adsorption phase volume or adsorption phase density is not required to be made, and the adsorption phase volume and adsorption phase density are directly determined from the point of view of the experiment, therefore, results determined by adopting the method are more objective and reliable than those determined by adopting the optimization method.

Description

technical field [0001] The invention relates to a method for measuring the adsorption phase density of adsorbate gas on adsorbate, belonging to the field of shale gas exploration. Background technique [0002] Scholars at home and abroad are studying the adsorption properties of coal-measure mudstone and shale (J.E.Fitzgerald et al, 2005; Katsuyuki Murata et al, 2001; Sommen J et al, 1995; Moffat D H et al, 1955; Thomas Rupple et al, 1974; Yee D et al, 1994; Berhard M.Krooss, 2008, 2010, 2013; Cui Yongjun, 1999, 2003; Zhou Li, 2000, 2001) found that the adsorption phase The existence of volume will reduce the volume of free gas in the sample cell, which will affect the test results of shale adsorption capacity. However, in the "GB / T 19560-2004 Coal High Pressure Isothermal Adsorption Test Method Capacity Method", the existence of the volume of the adsorption phase is ignored, which will inevitably lead to a large deviation in the evaluation of the adsorption capacity. In r...

Claims

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Application Information

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IPC IPC(8): G01N7/04
CPCG01N7/04
Inventor 陈国辉卢双舫李进步许晨曦薛海涛王民田善思黄开展
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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