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Pre-concentration-gas chromatograph and detection method for measuring content of sulfide in hydrogen

A technology of a gas chromatograph and a detection method, which is applied in the field of pre-concentration-gas chromatograph for determining the content of sulfide in hydrogen, can solve problems such as ineffective analysis, and achieves the advantages of avoiding adverse effects, simple calculation and accurate test results. Effect

Inactive Publication Date: 2019-07-19
CHEM INST OF NAT INST OF MEASUREMENT & TESTING TECH
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Problems solved by technology

However, due to the extremely low sulfide content in hydrogen fuel, if the trace sulfide in hydrogen is not pretreated, the commonly used detectors for the determination of sulfide such as thermal conductivity detector (TCD), flame photometric detector ( FPD), Pulsed Flame Photometric Detector (PFPD), Atomic Emission Detector (AED), Electrochemical Detector (ED) and Mass Selective Detector (MSD) cannot effectively analyze

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  • Pre-concentration-gas chromatograph and detection method for measuring content of sulfide in hydrogen
  • Pre-concentration-gas chromatograph and detection method for measuring content of sulfide in hydrogen

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Embodiment

[0035] A detection method for measuring sulfide content in hydrogen, comprising the steps of:

[0036] S1. Pass the hydrogen sample (the volume percentage of hydrogen is more than 99.99%) into the low-temperature first-stage cold trap equipped with glass beads. 50°C, and keep it for a period of time, slowly pass nitrogen gas, carry out sample dehydration treatment, and the sample after dehydration is sent to the secondary cold trap;

[0037] S2. The water-removed sample is passed into the secondary cold trap. The trap temperature of the secondary cold trap is -10°C. The sulfide is absorbed by the porous polymer, and the carbon dioxide is taken out by the carrier gas, and then the secondary cold trap is heated. Trap to 300°C to desorb sulfide from the adsorption material and enter the third-stage cold trap;

[0038] S3. The sulfide desorbed from the adsorption material is concentrated and accumulated in the third-stage cold trap with a trapping temperature of -100°C, and then ...

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Abstract

The invention discloses a pre-concentration-gas chromatograph and a detection method for measuring the content of a sulfide in hydrogen. The gas chromatograph comprises a first-stage cold trap, a second-stage cold trap, a third-stage cold trap, a quartz capillary chromatographic column column, a sulfur chemiluminiscence detector, a signal processor, and a display device, which are connected with each other in sequence. The detection method comprises the following steps: performing a three-stage desorption treatment of a hydrogen sample, and conveying the treated sulfide into the fused quartz capillary chromatographic column column with an uncoated inner wall; conveying the pre-concentrated sulfide into the sulfur chemiluminiscence detector through the fused quartz capillary chromatographiccolumn column with the uncoated inner wall; and receiving and processing, by the signal processor, the signal transmitted by the sulfur chemiluminiscence detector, and obtaining a corresponding chromatogram on the display device. The pre-concentration-gas chromatograph disclosed by the invention has a wide application range, is suitable for measuring various sulfocompounds in the hydrogen, and can be used for the impurity analysis in the GB / T 37244 "Fuel Hydrogen For Proton Exchange Membrane Fuel Cell Vehicle".

Description

technical field [0001] The invention relates to the field of gas analysis, in particular to a pre-concentration-gas chromatograph and a detection method for measuring sulfide content in hydrogen. Background technique [0002] In recent years, the global hydrogen energy technology has developed rapidly, and the application of hydrogen energy has become more and more extensive. In particular, hydrogen fuel cell vehicles are currently the key areas for the development of hydrogen energy technology. However, trace amounts of sulfide in hydrogen fuel can poison hydrogen fuel cell catalysts, leading to irreversible degradation of fuel cell performance. In GB / T 37244 "Fuel Hydrogen for Proton Exchange Membrane Fuel Cell Vehicles", the total content of sulfide in hydrogen fuel is strictly limited. However, due to the extremely low sulfide content in hydrogen fuel, if the trace sulfide in hydrogen is not pretreated, the commonly used detectors for the determination of sulfide such a...

Claims

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Application Information

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IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/8859
Inventor 杨嘉伟祁绩王维康潘义张婷林俊杰张苏敏方正
Owner CHEM INST OF NAT INST OF MEASUREMENT & TESTING TECH
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