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Thermal desorption-gas chromatograph and detection method for measuring sulfide content in hydrogen

A technology of a gas chromatograph and a detection method, which is applied in the field of thermal desorption-gas chromatograph for determining sulfide content in hydrogen, can solve problems such as ineffective analysis, and achieve a wide range of applications, accurate test results, and simple calculation. Effect

Inactive Publication Date: 2019-08-06
CHEM INST OF NAT INST OF MEASUREMENT & TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Thermal desorption-gas chromatograph and detection method for measuring sulfide content in hydrogen
  • Thermal desorption-gas chromatograph and detection method for measuring sulfide content in hydrogen
  • Thermal desorption-gas chromatograph and detection method for measuring sulfide content in hydrogen

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Effect test

Embodiment 1

[0037] The detection method for determining the sulfide content in hydrogen comprises the following steps:

[0038] S1. Pass the hydrogen sample into the adsorption tube filled with porous polymer, then heat the adsorption tube, and blow the sulfide out of the adsorption tube with nitrogen;

[0039] S2. The sulfide blown out from the adsorption tube enters the cold trap at minus 80°C. The cold trap is filled with porous macromolecular polymers. The sulfides are adsorbed and aggregated in the cold trap, and then the cold trap is heated to 300°C within 6s. , so that the sulfides are quickly and concentratedly released from the cold trap;

[0040] S3. The sulfide released from the cold trap enters the sulfur chemiluminescence detector through the uncoated fused silica capillary chromatographic column on the inner wall;

[0041] S4. Sulfide enters the sulfur chemiluminescence detector. First, hydrogen is introduced to burn the sulfide into sulfur monoxide, and then excess ozone i...

Embodiment 2

[0045] The detection method for determining the sulfide content in hydrogen comprises the following steps:

[0046] S1. Pass the hydrogen sample into the adsorption tube filled with porous polymer, then heat the adsorption tube, and blow the sulfide out of the adsorption tube with nitrogen;

[0047] S2. The sulfide blown out from the adsorption tube enters the cold trap at minus 70°C. The cold trap is filled with porous macromolecular polymers. The sulfides are adsorbed and aggregated in the cold trap, and then the cold trap is heated to 300°C within 6s. , so that the sulfides are quickly and concentratedly released from the cold trap;

[0048] S3. The sulfide released from the cold trap enters the sulfide luminescence detector through the uncoated fused silica capillary chromatographic column on the inner wall;

[0049] S4. Sulfide enters the sulfide luminescence detector. First, hydrogen is introduced to burn the sulfide into sulfur monoxide, and then excess ozone is added ...

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Abstract

The invention discloses a thermal desorption-gas chromatograph and detection method for measuring sulfide content in hydrogen. The gas chromatograph comprises an adsorption pipe, a cold trap, a quartzcapillary chromatographic column, a sulfur chemiluminiscence detector, a signal processor and a display device which are connected with one another sequentially. The detection method includes the following steps that: a hydrogen sample is introduced into an adsorption pipe, then the adsorption pipe is heated, and a carrier gas is adopted to blow a sulfide out from the adsorption pipe; the sulfideblown out from the adsorption pipe enters a cold trap in a low-temperature state, the sulfide is absorbed and gathered in the cold trap, the cold trap is rapidly heated, so that the sulfide can be rapidly released from the cold trap in a concentrated manner; the sulfide released from the cold trap enters a sulfur chemiluminiscence detector through a fused quartz capillary chromatographic column with uncoated inner walls; a signal processor receives and processes signals transmitted by the sulfur chemiluminiscence detector so as to obtain a corresponding chromatogram. The thermal desorption-gas chromatograph and detection method are suitable for measuring the content of various sulfides in hydrogen and can be used for impurity analysis in GB / T 37244 ''Fuel Hydrogen for Proton Exchange Membrane Fuel Cell Automobiles''.

Description

technical field [0001] The invention relates to the field of gas analysis, in particular to a thermal desorption-gas chromatograph and a detection method for determining the 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 the focus of the current hydrogen energy technology development. However, trace amounts of sulfides in hydrogen fuel can cause poisoning of hydrogen fuel cell catalysts, resulting in irreversible degradation of fuel cell performance. In GB / T 37244 "Proton Exchange Membrane Fuel Cell Vehicle Fuel Hydrogen", the total content of sulfide in hydrogen fuel is strictly limited. However, due to the extremely low content of sulfide in hydrogen fuel, if the trace amount of sulfide in hydrogen is not pretreated, the commonly used detectors for sulfide determi...

Claims

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Application Information

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