Method and system for measuring content of gas components in fuel hydrogen

Abstract

The invention discloses a method and system for measuring the content of gas components in fuel hydrogen, a gas sample is quantitatively sampled through a first quantitative loop, then a first chromatographic column and a first exhaust valve are conducted, the front main components of hydrogen are emptied through the first exhaust valve, and when oxygen and argon are separated from the first chromatographic column, the first chromatographic column is communicated with a second chromatographic column, oxygen and argon are carried into the second chromatographic column, when oxygen and argon completely enter the second chromatographic column, the first chromatographic column is switched to be communicated with the first exhaust valve, and main components after hydrogen are discharged. When nitrogen is separated from the first chromatographic column, the first chromatographic column is switched to be communicated with the second chromatographic column, the nitrogen, methane and carbon monoxide are carried to the second chromatographic column, and the content of the nitrogen, methane and carbon monoxide is detected by the pulse discharge helium ionization detector, so that a gas sample can be prevented from being separated at one time, and the fuel hydrogen content is high; the separated permanent gas is easily separated from the first chromatographic column, so that the detection result is inaccurate, the detection efficiency can be improved as much as possible through twice completion, and the separation time is prevented from being prolonged.

Description

technical field [0001] The invention relates to the technical field of gas chromatographic analysis, in particular to a method for measuring the content of gas components in fuel hydrogen and a system for measuring the content. Background technique [0002] At present, the water content is determined according to the method specified in Chapter 6 of GB / T5832.2 or Chapter 6 of GB / T5832.3. The total hydrocarbons (in CH 4 The determination of oxygen content shall be carried out according to the method specified in Chapter 7 of GB / T8984, and the determination of oxygen content shall be carried out according to Chapter 6 of GB / T6285 (measurement of trace oxygen by electrochemical method) or Chapter 7 of GB / T5831 (measurement of trace oxygen by electrochemical method) Measurement of trace oxygen) for determination, nitrogen and argon content by the method specified in Chapter 5 of GB / T3634.2, carbon dioxide content by the method specified in GB / T8984 Chapter 7, carbon monoxide con...

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Problems solved by technology

Patent document CN106153431A discloses a detection method and its device for rapid determination of crude gas components. The present invention discloses a detection method and device for rapid determination of crude gas components, which mainly solve the problem of carbon dioxide existing in the current crude gas gas chromatography analysis technology. Determination of non-linearity, high detection limit of TCD, high cost of multi-column measurement system, long detection time and other problems

The device for rapid determination of crude gas components is mainly composed of a purification device, a chromatographic column separation device, a conversion device, a detector and a data processing unit. The purification device is used for dust removal, desulfurization, and dehydration of the crude gas; the multi-column separation device is used for Separation of various gas components; the conversion device converts carbon dioxide and carbon monoxide into methane; the detector and data processing unit are used for qualitative and quantitative purposes, but in the above two patent documents, a single chromatographic column is used for the separation of permanent gases, and Using a single chromatographic column to retain gases other than permanent gases will inevitably lead to inaccurate determination and complex chromatographic column structures.

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