Rare gas all-component content online analysis method
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A rare gas and rare gas technology, applied in the analysis of materials, material analysis by electromagnetic means, measuring devices, etc., can solve the problems of shortage, restriction of comprehensive evaluation and utilization, etc., and achieve high accuracy, high reliability, and fast analysis Effect
Inactive Publication Date: 2015-11-25
PETROCHINA CO LTD
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Problems solved by technology
At present, the analysis of rare components in natural gas is mainly based on the analysis of He and Ar, and there is a lack of comprehensive understanding of the content dis
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[0032] The present embodiment provides a kind of rare gas He, Ne, Ar, Kr, Xe whole component content on-line analysis method, it comprises the following steps (this embodiment adopts figure 1 The device shown is for online analysis of the total component content of noble gases):
[0033] 1) Select a high-pressure steel cylinder 1 with a volume of 0.7L and double valves, and use mechanical pump 5, molecular pump 8 and other vacuum equipment to evacuate to 10°C before sampling. -3 Pa;
[0034] 2) When sampling on site, connect the high-pressure steel cylinder 1 to the sampling well through the wellhead sampler, and repeatedly flush the high-pressure steel cylinder with natural gas for 5 times for about 12 minutes, and finally collect the middle section of the continuous gas flow, and complete the natural gas sampling when the gas pressure in the cylinder reaches 4MPa ;
[0035] 3) Use mechanical pump 5, molecular pump 8 and ion pump 12 to vacuumize the main line of the device ...
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Abstract
The invention provides a rare gas all-component content online analysis method. The method includes the following steps: carrying out vacuumization and heating degassing treatment on a main pipeline of a rare gas sample preparation device; connecting an air standard sample to a sample introduction port, vacuumizing a connecting pipeline, and controlling the sample introduction pressure of the air standard sample; purifying the air standard sample, and enriching rare gases; sending the enriched rare gases to quadrupole mass spectrometer, and carrying out a series of analysis calculation; repeating the above operations on a natural gas sample; and obtaining correction values of the rare gas all-component contents in the natural gas sample. The method has the characteristics of simple operation, fast analysis, high reliability, good repeatability, high accuracy and the like, and can provide accurate and reliable parameters for evaluation and utilization of the contents of the rare gas all components of He, Ne, Ar, Kr and Xe.
Description
technical field [0001] The invention relates to an online analysis method for the total component content of rare gases, in particular to an online analysis method for the full component content of rare gases He, Ne, Ar, Kr, and Xe in natural gas, and belongs to the technical field of natural gas experimental analysis in oil and gas geological exploration. Background technique [0002] Rare gases refer to group zero elements in the periodic table, mainly including He, Ne, Ar, Kr, Xe, and Rn. Since Rn is a radioactive element, geological research usually only involves He, Ne, Ar, Kr, and Xe. Due to their inactive chemical properties, low thermal conductivity and resistance, low melting and boiling points, and easy luminescence and other special physical properties, rare gases are widely used in aerospace, atomic energy, low-temperature superconductivity, deep diving, laser, electronics, medicine, metallurgy, oil and gas exploration and other fields. Or the industry has import...
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