Online analysis method for sulfur isotope of hydrogen sulfide gas in natural gas
A technology of sulfur isotope and analysis method, applied in the direction of analyzing materials, material analysis by electromagnetic means, measuring devices, etc., can solve the problems of easy to cause sulfur isotope fractionation, human error, complicated operation, etc., to achieve simple operation, fast analysis, The effect of using less sample
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Embodiment 1
[0061] This embodiment provides a device for on-line analysis of hydrogen sulfide and sulfur isotopes in natural gas, its structure is as follows figure 1 shown. The device includes an elemental analyzer 5, a stable isotope ratio mass spectrometer 8 and a continuous flow interface 7, wherein,
[0062] Elemental analyzer 5 comprises oxidation furnace 2, dehydration pipe 4 and gas chromatography column 6, and is provided with a sample inlet 1, sends a sample inlet 13, oxygen inlet 9 and the first carrier gas inlet 10 on this inlet 1;
[0063] Oxidation furnace 2 is provided with high temperature oxidation tube 3, one end of this high temperature oxidation tube 3 is connected with sample inlet 1, its inner cavity is communicated with sample inlet 13, and the other end is connected with one end of dehydration pipe 4; One end is connected with one end of the gas chromatographic column 6, the other end of the gas chromatographic column 6 is connected with one end of the continuous ...
Embodiment 2
[0065] This embodiment provides a method for on-line analysis of hydrogen sulfide gas sulfur isotope in natural gas, and its analysis device is the device that embodiment 1 provides, and this method is carried out according to the following steps:
[0066] (1) Collect wellhead natural gas (with a hydrogen sulfide content of about 7.6%) at the wellhead of Tiandong 53 in the Wubaiti gas field in the Sichuan Basin: connect a 1L high-pressure steel cylinder with a hydrogen sulfide corrosion-resistant coating and a wellhead sampling device to the wellhead On the sampling valve, open the cylinder valve and the wellhead sampling valve in turn, and when the gas pressure in the cylinder is greater than 2MPa, close the cylinder valve and the wellhead sampling valve, remove the sampling cylinder and the wellhead sampling device, and the sample collection is completed;
[0067] (2), establish the communication link between element analyzer 5 and stable isotope ratio mass spectrometer 8;
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