Gas chromatograph for analysing total-hydrocarbon constituents of gasoline and diesel catalytic cracking products

A gas chromatograph and catalytic cracking technology, which is applied in the field of instruments for analyzing catalytic cracking products, can solve the problems of large space occupation, high development cost, complex system, etc., and achieve the effect of convenient operation, low cost and simple operation

Active Publication Date: 2014-07-23
EAST CHINA NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it needs two gas chromatographs to detect the full hydrocarbon components of gasoline and diesel catalytic cracking products, which has the disadvantages of high development cost, large space occupation, and the need for multiple chemical workstations to process data.
Although a two-dimensional gas chromatograph equipped with two-valve, three-column and dual-FID detectors can realize the analysis of the above-mentioned products, but because two FID detectors are required, the whole system is relatively complicated and the development cost is still high
So far, there is no gas chromatograph that uses a single FID detector, only relies on valve switching technology, and a single temperature program to analyze the full hydrocarbon components of gasoline and diesel catalytic cracking products

Method used

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  • Gas chromatograph for analysing total-hydrocarbon constituents of gasoline and diesel catalytic cracking products
  • Gas chromatograph for analysing total-hydrocarbon constituents of gasoline and diesel catalytic cracking products
  • Gas chromatograph for analysing total-hydrocarbon constituents of gasoline and diesel catalytic cracking products

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Embodiment

[0026] refer to figure 1 , the instrument is in standby backflush state, carrier gas N 2 The circuit is: carrier gas inlet → three-way stop valve 1 middle path → three-way stop valve 1 right path → six-way valve channel 1 → six-way valve channel 2 → twelve-way valve channel 21 → twelve-way valve channel 22 → chromatographic column 1→Three-way stop valve 2 left path→Three-way stop valve 2 middle path→FID detector; sample 1 circuit is: six-way valve channel 4→six-way valve channel 3→quantitative tube 1→six-way valve channel 6→six-way Valve channel 5; sample 2 circuit is: 12-way valve channel 30→12-way valve channel 29→quantitative tube 2→12-way valve channel 32→12-way valve channel 31; backflush circuit is: auxiliary gas→10 Two-way valve channel 26→twelve-way valve channel 25→chromatographic column 3→twelve-way valve channel 28→twelve-way valve channel 27; in column selection, from three-way stop valve 1 to chromatographic column 2 to three-way stop The detailed route of valve...

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Abstract

The invention discloses a gas chromatograph for analysing the total-hydrocarbon constituents of gasoline and diesel catalytic cracking products. The gas chromatograph comprises a six-way valve, a twelve-way valve, three chromatographic columns, two quantification tubes, two three-way stop valves and an FID (flame ionization detector), wherein C1-C5 light hydrocarbon constituents and C6<+> high-carbon hydrocarbon constituents in the gasoline and diesel catalytic cracking products are measured simultaneously by a valve and column switching technology. The gas chromatograph disclosed by the invention can be applied to research of oil refineries, and universities and colleges on a catalytic cracking reaction mechanism, and is convenient to operate, high in practicability, simple in structure and low in cost.

Description

technical field [0001] The invention relates to an instrument for analyzing catalytic cracking products, in particular to a gas chromatograph for analyzing all hydrocarbon components of gasoline and diesel catalytic cracking products. Background technique [0002] Catalytic cracking reaction of gasoline and diesel is a common method for performance evaluation and mechanism research of cracking catalysts. When a single gasoline and diesel model component such as certain alkanes or olefins in C6~C16 is used as a raw material, the cracked products are mainly light hydrocarbons of C1~C5 and C6 + The separation and analysis of these components, especially the C1~C5 light hydrocarbon components, has important practical significance for the study of cracking mechanism. C1~C5 light hydrocarbon components have lower boiling points and similar properties, especially the analysis of C4 olefins is more difficult. Currently, Al 2 o 3 The packed chromatographic column can separate and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 薛青松张继东孙明星王一萌何鸣元
Owner EAST CHINA NORMAL UNIV
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