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Ceramic oxidation pipe used in carbon isotope of natural gas analysis

A carbon isotope, ceramic oxidation technology, applied in the direction of chemical analysis using combustion, can solve the problems of poor methane oxidation effect, unstable analysis data, small reaction surface area, etc., to improve analysis precision and accuracy, increase reaction contact The effect of large area and contact area

Inactive Publication Date: 2009-08-12
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The key technology of the oxidation tube is the inner diameter of the tube body and the filler. These two types of oxidation tubes have common disadvantages: (1) Limited by the inner diameter of the tube, the amount of copper oxide filled is small and the reaction surface area is small, so the reaction to methane The oxidation effect is not good, and the analysis data is unstable; (2) Due to the small amount of copper oxide filled, the copper oxide will be consumed quickly, and it will be scrapped after continuous use for about 5 days, so the service life is very short; (3) The heating temperature It is required to reach 1000°C, the power consumption is large, and the life of the electric furnace is short; (4) If the gas sample contains hydrogen sulfide gas, hydrogen sulfide will form copper sulfide with copper oxide in the tube, making the oxidation tube quickly invalid; (5) oxidation The free oxygen released by copper enters the mass spectrometer and has a damaging effect on the mass spectrometer

Method used

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  • Ceramic oxidation pipe used in carbon isotope of natural gas analysis
  • Ceramic oxidation pipe used in carbon isotope of natural gas analysis
  • Ceramic oxidation pipe used in carbon isotope of natural gas analysis

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Embodiment Construction

[0018] participate image 3 As shown, the ceramic oxidation tube for carbon isotope analysis of natural gas of the present invention includes a ceramic tube body 1. The high temperature zone 2 of the tube body 1 is filled with copper oxide particles 3, and the particle size of the copper oxide particles 3 is 0.3-0.5 mm ; The inner diameter of the tube body 1 is 1.2 ~ 1.5mm, and there are also pure copper particle regions 4 on both sides of the high temperature zone 2 in the tube.

[0019] The specific use method of the oxidation tube of the present invention is the same as that of the traditional oxidation tube, but when heating, the temperature of the high temperature zone 2 only needs to be heated to 850°C, and the methane gas in the sample can get a good reaction effect with the copper oxide particles 3 ; At the same time, using the heat transfer of the ceramic tube body 1, the pure copper particle area 4 can reach a reaction temperature of about 550 ℃, so that the hydrogen sulf...

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Abstract

The invention discloses a ceramic oxidation tube for the analysis of natural gas carbon isotopes, and aims to provide an oxidation tube with good oxidation effect, stable analysis data and long service life. There are copper oxide particles, and the particle size of copper oxide particles is 0.3-0.5mm; the inner diameter of the pipe is 1.2-1.5mm, and there are also pure copper particle areas on both sides of the high-temperature area in the pipe; the oxidation pipe of the present invention is used for natural gas carbon isotope analysis experiments .

Description

Technical field [0001] The invention relates to an oxidation tube for laboratory use, in particular to a ceramic oxidation tube for carbon isotope analysis of natural gas. Background technique [0002] The main component of natural gas is methane, and the carbon isotope analysis of methane is one of the important methods for the study of oil and gas geochemistry. At present, one of the steps of domestic and foreign methane carbon isotope analysis is to pass methane through a quartz tube or ceramic tube filled with copper oxide at a high temperature of 1000 ℃. The methane combines with the free oxygen released by the copper oxide to generate CO. 2 , Analyze CO by mass spectrometer 2 To calculate the carbon isotope of methane. The above-mentioned quartz tube or ceramic tube filled with copper oxide is called an oxidation tube. At present, there are two types of traditional oxidation tubes used at home and abroad, type one, please refer to the attachment figure 1 As shown, the inne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/12
Inventor 刘金钟贾望鲁向同寿
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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