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Method for measuring krypton, xenon and methane in air separation oxygen and equipment for measuring krypton, xenon and methane in air separation oxygen

A measurement method and technology of measurement equipment, which is applied to the measurement equipment of xenon and methane, the measurement of xenon and methane, and the field of krypton in air separation oxygen, which can solve the problems that oxygen cannot be discharged, cannot be used for a long time, and cannot be quantitatively analyzed for methane

Active Publication Date: 2021-05-28
中昊光明化工研究设计院有限公司
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  • Application Information

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Problems solved by technology

However, the oxygen in the device cannot be discharged, and thus enters the detector, and the oxidized thermal conductivity element causes irreversible damage to the instrument, which cannot be used for a long time; moreover, when using this device for measurement, the oxygen peak will also cover the methane peak, and methane cannot be accurately measured. quantitative analysis

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  • Method for measuring krypton, xenon and methane in air separation oxygen and equipment for measuring krypton, xenon and methane in air separation oxygen
  • Method for measuring krypton, xenon and methane in air separation oxygen and equipment for measuring krypton, xenon and methane in air separation oxygen
  • Method for measuring krypton, xenon and methane in air separation oxygen and equipment for measuring krypton, xenon and methane in air separation oxygen

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Embodiment 1

[0071] use figure 1Described device, the standard gas that will contain the krypton of 2000ppm, the xenon of 200ppm and the methane of 2000ppm is controlled by the gas fine-tuning valve and enters in the catalytic dehydrocarbonation device with the flow rate of 50mL / min through the inlet (the catalytic dehydrocarbonation The catalyst in the device is a palladium catalyst with a particle size of 20 μm and a filling capacity of 25 g). After catalytic dehydrogenation reaction at a temperature of 380 ° C, the injection valve is rotated to the injection position, and the thermal conductivity detector is turned on at the same time. and carry out temperature program (heat up to 80°C for 1min, continue to heat up to 150°C for 1min, then cool down to 80°C) to confirm, so that the gas after catalytic dehydrocarbonation enters the catalytic deoxygenation device through the six-way sampling valve (the The catalyst in the catalytic deoxygenation device is a palladium catalyst, the particle...

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Abstract

The invention relates to the technical field of gas measurement, and in particular relates to a method for measuring krypton, xenon and methane in air separation oxygen and equipment for measuring krypton, xenon and methane in air separation oxygen. According to the method, methane is removed, so that interference of methane on krypton detection is avoided, methane is converted into carbon dioxide, the carbon dioxide is tested, the purpose of accurately determining the content of methane is further achieved, oxygen is removed, krypton peaks are prevented from being covered by oxygen peaks, damage of oxygen to a detector is also prevented, and the detection precision of krypton, xenon and methane is improved.

Description

technical field [0001] The invention relates to the technical field of gas measurement, in particular to a method for measuring krypton, xenon and methane in air-separated oxygen and a device for measuring krypton, xenon and methane in air-separated oxygen. Background technique [0002] Rare gases, also known as noble gases, as the name suggests, are rare in nature, expensive and widely used. Among them, krypton and xenon are noble gases. Therefore, there have been many professional enterprises producing and purifying krypton and xenon. As we all know, in the raw material gas required for rare gas production, the level of the impurity content of the rare gas directly determines the price of the raw material gas, and it also plays a decisive role in the production process, thus creating a technical demand for the analysis and detection of krypton and xenon gas raw material gases . [0003] In the gas detection and analysis industry, there have always been some problems in ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/86
CPCG01N30/02G01N30/8634
Inventor 罗旭郑国财赵敏
Owner 中昊光明化工研究设计院有限公司
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