Online analysis method for gas components in natural gas hydrogen production process

An analysis method and technology of gas components, applied in the field of analysis of gas components, can solve the problems of complicated dehydration column regeneration, low sensitivity, unfavorable operation, etc., and achieve the goals of reducing analysis time, improving analysis efficiency, and optimizing analysis errors Effect

Active Publication Date: 2013-02-20
SUZHOU JINHONG GAS CO LTD
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Problems solved by technology

[0004] The traditional analysis method is to use FID and TCD detectors and add a dehydration device. The disadvantages are low sensitivity, complex gas path, unfavorable operation, and rapid regeneration of the dehydration column.

Method used

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  • Online analysis method for gas components in natural gas hydrogen production process

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specific Embodiment approach

[0035] Below, refer to the attached figure 1 The present invention will be described.

[0036] 1. Analysis of 5N high-purity hydrogen

[0037] Use 5N high-purity hydrogen as a sample, and the sample enters the chromatograph at a flow rate of 0.1 MPa and 300 mL / min to replace the quantitative tubes (1) and (2) of the chromatograph. After 1 min of replacement, start the operating procedure. Send the sample gas in the quantitative tubes (1) and (2) to the Q column and 5A column I of the chromatograph respectively, and the Q column is vented through the needle valve 3 to remove CO 2 All components of the chromatograph then enter the PDD detector of the chromatograph to analyze the CO 2Impurity content. The 5A column I plays the role of pre-separation, and most of the main component H2 is emptied through the needle valve 1, but it is ensured that there is no loss of O2 in the sample gas, and then the remaining components are sent to the 5A column of the chromatograph by switchi...

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Abstract

The invention discloses an online analysis method for gas components in a natural gas hydrogen production process. According to the method, four valve, six columns, three quantitative pipes, double gas paths, double detectors (PDD and TCD), double channels and a host machine of a chromatograph are adopted, front end switch three way sampling is adopted, and merging-into-two way in the instrument is adopted to concurrently carry out trace detection and constant detection on 5N high purity hydrogen, conversion gas and shift gas, and monitor product quality and catalyst performances. According to the present invention, the method for determining five key impurities in the high purity hydrogen and contents of CO, CO2 and CH4 affecting catalyst performances in the conversion gas and the shift gas by using the single instrument has the following characteristics that: sensitivity meets testing requirements, and the two systems are adopted, such that rapid switch and accurate quantification can be achieved so as to effectively reduce an analysis time.

Description

technical field [0001] The invention relates to a method for analyzing gas components, in particular to a method for analyzing trace components in high-purity hydrogen produced from natural gas, reformed gas, and constant components in shifted gas. Background technique [0002] Hydrogen is one of the cleanest and eternal energy sources for human beings. The composition of the world's energy has gone through the process from solidification (firewood, coal, nuclear), liquefaction (petroleum), to vaporization (natural gas, hydrogen), and the proportion of carbon and hydrogen in it has dropped all the way: 90% (firewood), 60% (coal) 30% (oil), 20% (natural gas), 0% (hydrogen), the hydrogen content is getting higher and higher, while the carbon content is getting lower and lower. As we all know, carbon dioxide is the culprit that causes pollution to cause the global warming effect, and the reduction of carbon content means clean energy. Due to its special properties, hydrogen i...

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Application Information

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IPC IPC(8): G01N30/02
Inventor 金向华孙猛李英辉
Owner SUZHOU JINHONG GAS CO LTD
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