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Online chromatographic analysis method

A chromatographic analysis and component analysis technology, applied in the field of online chromatographic analysis of water, hydrogen/permanent gas and hydrocarbon mixtures, can solve the problems of water interference, non-aromatic and aromatic mixtures can not be analyzed at the same time, to avoid water interference , the effect of good technical effect

Active Publication Date: 2010-11-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problem that the mixture of hydrogen / permanent gas, non-aromatic and aromatic hydrocarbons cannot be analyzed at the same time and the problem of water interference when analyzing the water-containing reaction system in the chromatographic analysis technology, and a new online chromatographic analysis is provided. method

Method used

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Embodiment 1

[0037] use figure 1 The online chromatographic analysis device shown in the figure analyzes the standard mixed gas, and the typical chromatographic analysis conditions are shown in Table 1. Among them, standard gas 2 # As the sample to be tested, and with 1 # Calibration gas as a standard, for 2 # The standard gas has been quantitatively calculated by the appearance method and the correlation method. The composition and analysis results of the standard samples are shown in Table 2.

[0038] Table 1 Typical chromatographic analysis conditions

[0039]

[0040] Table 2 Standard gas analysis results

[0041]

Embodiment 2

[0043] use figure 1 The shown online chromatographic analysis device analyzes self-prepared styrene standard samples (about 70% water content by mass ratio). The typical online chromatographic analysis conditions are shown in Table 3, and the standard sample composition and analysis results are shown in Table 4.

[0044] Table 3 typical chromatographic analysis conditions

[0045]

[0046] Table 4 standard sample analysis results

[0047]

Embodiment 3

[0049] use figure 1 The online chromatographic analysis device shown is for online chromatographic analysis of the styrene catalyst evaluation reaction product. The reaction product consists of hydrogen (a small amount), water (accounting for about 70% of the total product mass), C1-C4 light hydrocarbons, C5 and C6 non- Aromatic, styrene and other aromatic hydrocarbons. The typical online chromatographic analysis conditions are the same as Table 3, and the typical chromatograms are shown in figure 2 , and the analysis results are shown in Table 5.

[0050] The online chromatographic analysis device of the present invention is used to carry out automatic online analysis of actual samples, and perform relevant processing and calculation on the results of 10 consecutive automatic sampling analyzes in a certain day, and compare the results with the offline analysis results, as shown in Table 5. The results show that the online chromatographic analysis device operates stably, an...

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Abstract

The invention relates to an online chromatographic analysis method, which mainly solves the problem of difficult simultaneous analysis of a mixture of hydrogen / permanent gases, non-aromatic hydrocarbon and aromatic hydrocarbon in the process of analyzing an aqueous reaction system and solves the water interference problem during analysis in the conventional chromatographic analysis technology. A technical scheme of two serially connected analysis systems, namely a hydrogen / permanent gas analysis system and a non-aromatic hydrocarbon and aromatic hydrocarbon analysis system is adopted, so the online chromatographic analysis method well solves the problem of the simultaneous analysis of the mixture of hydrogen / permanent gases, non-aromatic hydrocarbon and aromatic hydrocarbon and the water interference problem during analysis, and can be used for online chromatographic analysis of the aqueous mixture of hydrogen / permanent gases, non-aromatic hydrocarbon and aromatic hydrocarbon.

Description

technical field [0001] The invention relates to an online chromatographic analysis method, in particular to an online chromatographic analysis method for mixtures containing water, hydrogen / permanent gas and hydrocarbons. Background technique [0002] Many reactions are endothermic reactions, and the heat of the reaction is provided by water vapor with a large heat capacity, so the reaction product system contains a large amount of water. The presence of water brings great challenges to the chromatographic analysis of reaction products, because capillary chromatographic columns used for the separation of hydrocarbons, especially non-aromatic mixtures, are generally very sensitive to water, and water will not only change the polarity of the chromatographic column, resulting in peaks The tail broadens and the separation effect deteriorates. At the same time, it will also lead to a series of problems such as increased column loss, loss of water resistance of the chromatographic...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/78G01N30/06G01N30/32
Inventor 高枝荣张育红王川黄燕华
Owner CHINA PETROLEUM & CHEM CORP
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