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Gas chromatographic analysis device and analysis method for trace amounts of hydrogen, oxygen and nitrogen in gas

A gas chromatographic analysis and trace hydrogen technology, which is used in measurement devices, analytical materials, material separation, etc. Simple instrument maintenance and reproducible results

Active Publication Date: 2021-07-27
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The main purpose of the present invention is to provide a gas chromatographic analysis device and analysis method for trace hydrogen, oxygen and nitrogen in gas, to solve the problem that the detection method in the prior art is difficult to meet the accuracy requirements of trace hydrogen, oxygen and nitrogen analysis question

Method used

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  • Gas chromatographic analysis device and analysis method for trace amounts of hydrogen, oxygen and nitrogen in gas
  • Gas chromatographic analysis device and analysis method for trace amounts of hydrogen, oxygen and nitrogen in gas
  • Gas chromatographic analysis device and analysis method for trace amounts of hydrogen, oxygen and nitrogen in gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1.1 Chromatographic column: pre-column Agilent Technologies, Inc.19095P-Q04 HP-PLOT / Q, 30m*0.530mm 40.0Micro; analytical column Agilent J&W GC Columns CP-Molsieve 5A 50m 0.53umP / N: CP7539,

[0058] 1.2 Detector: VICI HID detector of Alco Company, the temperature of the HID detector is 120°C, and the attenuation is 8.

[0059] 1.3PE company with chromatographic workstation chromatographic host;

[0060] 1.4 Oven temperature of chromatographic column: 60°C, keep for 15 minutes; sensitivity range is 1; attenuation is -6;

[0061] 1.5 valve event: eight-way valve, 0.01min open, see figure 2 ; Eight-way valve; 1.00min off; see figure 1 ;

[0062] 1.6 Carrier gas: helium 99.999%; carrier gas purification device: the first-stage molecular sieve adsorbent removes trace oxygen, water, and organic matter, and then controls the impurity content below 1ppm through the second-stage trap purifier; then passes through the third-stage The high-temperature VICI purifier controls th...

Embodiment 2

[0070] The difference from Example 1 is that the temperature of the HID detector is 160° C. and the attenuation is 4.

Embodiment 3

[0072] The difference from Example 1 is that the temperature of the HID detector is 100° C. and the attenuation is 8.

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Abstract

The invention provides a gas chromatography analysis device and analysis method for trace amounts of hydrogen, oxygen and nitrogen in gas. The gas chromatographic analysis device includes: a flow controller, a plurality of pressure controllers, a plurality of three-way valves, a damping valve, a valve box protector, an eight-way valve and an HID detector, a pre-separation column and an analysis column, wherein the flow control , pressure controller, damping valve and three-way valve cooperate to control the flow direction, flow and pressure of the passing gas; the valve box protector provides carrier gas atmosphere protection for the gas chromatography analysis device; The flow direction under the gas drive; the pre-separation column and the analysis column realize the separation of the gas components in the gas to be tested under the action of controlling the direction of the carrier gas; the HID detector detects the content of hydrogen, oxygen and nitrogen in the gas. Using a chromatographic column machine to connect to the HID detector, the instrument is easy to maintain, and the determination of trace hydrogen, oxygen and nitrogen has high accuracy, short time, good stability and good reproducibility.

Description

technical field [0001] The invention relates to the field of gas analysis, in particular to a gas chromatography analysis device and analysis method for trace amounts of hydrogen, oxygen and nitrogen in gas. Background technique [0002] In the field of coal chemical industry such as coal-to-liquids and coal-to-olefins, the downstream sections of the process have very strict requirements on the indicators of trace amounts of hydrogen, oxygen, and nitrogen, especially when it comes to catalytic reactions. In order to meet the requirements of the sample gas, especially the analysis requirements for the special detection of trace hydrogen, oxygen, nitrogen and other components in ethylene, propylene, and butene, it is necessary to provide a fast, high-precision, and repeatable analytical data for the process. Provide a basis for fine operation. [0003] There are many methods for the determination of trace amounts of hydrogen, oxygen, and nitrogen in gases, but for trace analy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 曲国兴魏勇杨少林张宇飞
Owner CHNA ENERGY INVESTMENT CORP LTD
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