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Gas oxygen molecule total amount detecting method for detecting repeatedly-usable function of material

A technology for detecting materials and detection methods, which is applied in the direction of material analysis by optical means, analysis by making materials undergo chemical reactions, and measurement devices, which can solve the problem of inability to distinguish the accumulated oxygen content, cannot be used repeatedly, and cannot be used at high temperatures. Use and other problems, to achieve the effect of increasing the temperature range of use, increasing the temperature resistance, and widening the temperature range

Active Publication Date: 2011-06-29
上海先普气体技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this patent, since lithium, oxygen, water and other impurities will react to form lithium oxide, the accumulated oxygen content in the gas cannot be distinguished from other impurities.
And lithium-containing organic resin can only be used once
Can not be used repeatedly
Finally, organic resins decompose at high temperatures, so this patented technology cannot be used at high temperatures

Method used

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  • Gas oxygen molecule total amount detecting method for detecting repeatedly-usable function of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Refer to Figure 1. Among them, 1 is the probe material, 2 is the first optical fiber, 3 is the second optical fiber, 4 is the light-emitting diode, and 5 is the photodiode. Metal pipe 6 is used for fixing and protecting 1-3. Sealing material 7 plays the role of fixing 2 and 3 and sealing. 8 is a gas container. 9 is a heating device.

[0042] The specific implementation method is as follows: the probe material is a catalyst material made of 50-100% manganese + 0-50% copper oxide. The inorganic porous substrate is a zeolite material with a porosity of more than 200 square meters per gram.

[0043] The heating temperature during activation is 210-270°C. 100% hydrogen gas is passed through the gas container 8 . The time is 0.5-2 hours.

[0044] Using an optical fiber, irradiating green light with a wavelength of 550 nanometers on the surface of the detection material, and using a second optical fiber to align the position irradiated by the first optical fiber to coll...

Embodiment 2

[0049] The probe material in Example 1 is changed to a catalyst material made of 10-30% manganese + 20-50% chromium + 20-50% copper oxide. The activation temperature is 320-350°C. The irradiation light is light with a wavelength of 500 nanometers. Pass 3-10% hydrogen+90-97% nitrogen in gas container 8. The time is 0.5-2 hours. After activation, cool down to 200°C and measure the current of the photodiode to be 0.17 mA.

[0050] 100% nitrogen is then passed through the gas container 8 . The oxygen content was 1.3 ppm. After 17 hours the photodiode current had dropped to 0.01 mA. The measurement is over. Regenerate the probe material using the same conditions as for activation. After regeneration, measure the photodiode current repeatedly to 0.17 mA.

Embodiment 3

[0052] The probe material in Example 1 was changed to a catalyst material made of 100% manganese oxide. The activation temperature is 270-310°C. The irradiation light is light with a wavelength of 520 nanometers. Pass 10% hydrogen + 90% nitrogen in the gas container 8 . The time is 1-1.5 hours. After activation, cool down to 200°C and measure the current of the photodiode to be 0.15 mA.

[0053] 100% nitrogen is then passed through the gas container 8 . The oxygen content was 1.3 ppm. After 17 hours the photodiode current had dropped to 0.01 mA. The measurement is over. Regenerate the probe material using the same conditions as for activation. After regeneration, measure the photodiode current repeatedly to 0.15 mA.

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Abstract

Provided is a method of accumulating a sum of oxygen molecules in probe gas with reusable probe materials. Inorganic porous materials are used as basis materials, oxide made of manganese, chrome and copper covered on an outer surface of a pore thereof is made into probe materials, heat activated in reducing atmosphere, causing the oxide reduced to be a lower oxidation state. An optical fiber is used to irradiate the light with wavelength 550-600 nm onto the surface of the probe materials, also one optical fiber is used to collect surface reflection light on the irradiation position, the reflected light is converted to electrical signals. Oxygen molecules in the gas oxidates the oxide of manganese, chrome and copper to a higher oxidation state step by step. Reflecting ability of the surface of the probe materials on nm light is reduced. Corresponding electric signal reduced value is set, causing the sum of oxygen molecules to reach scheduled index. The method is suitable for measurement of accumulating a sum of oxygen molecules on certain special point in a gas container at room temperature -200 DEG C. The method has good selectivity on oxygen, wide tolerance temperature range, situ restoration of materials.

Description

technical field [0001] The present invention relates to the field of gas analysis, in particular, the present invention relates to a method for analyzing and monitoring the cumulative oxygen content near a certain point in the gas environment, more specifically, the present invention relates to a detection material that can repeat The detection method used for the total amount of oxygen molecules in the gas. Background technique [0002] In the field of gas analysis, the gas sensor is the core of the gas detection system and is usually installed in the detection head. In essence, a gas sensor is a converter that converts a certain gas volume fraction into a corresponding electrical signal. The probe head conditions the gas sample through the gas sensor, which usually includes filtering out impurities and interfering gases, drying or refrigeration treatment, sample suction, and even chemical treatment of the sample for faster measurement by the chemical sensor. [0003] The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/75G01N21/17
Inventor 江晓松
Owner 上海先普气体技术有限公司