Method for automatically analyzing gasoline detailed hydrocarbon compositions by utilizing gas chromatography
A gas chromatography and automatic analysis technology, which is applied in the field of gas chromatographic analysis of gasoline monomer hydrocarbons, can solve problems such as analysis deviation, qualitative and quantitative deviation, and inability to guarantee correctness, so as to achieve the effect of reducing requirements and improving reliability and efficiency
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example 1
[0110] Extract characteristic data for a standard straight-run gasoline sample.
[0111] The standard straight-run gasoline sample is taken from the initial distillation ~ 200°C product after the crude oil is cut by the atmospheric and vacuum unit of the refinery.
[0112] Standard straight-run gasoline samples were subjected to gas chromatographic analysis. According to the retention time of each component in the spectrum, extract C 5 ~C 10 The retention times of normal alkanes, benzene, toluene and o-xylene are used as standard retention times, as shown in Table 14.
[0113] Table 14
[0114] component name Standard retention time, minutes c 5 11.941 c 6 18.384 c 7 29.304 c 8 41.614 c 9 52.980 c 10 63.246 benzene 23.605 toluene 36.192 O-xylene 51.044
example 2
[0116] (1) Set up and start the sample analysis sequence
[0117]In the chromatographic workstation, set the storage path of the original chromatographic analysis data as "c:\hpchem\1\data\pona", and the data file names are "Gasoline1" to "Gasoline3" for the three samples to be tested. At the same time, start the method software, and specify the reading path of the original analysis data in the analysis software as "c:\hpchem\1\data\pona\Gasoline1" to "c:\hpchem\1\data\pona\Gasoline3". Set the original analysis data file as the data result file of "report.txt". After the conditions of the chromatographic instrument were stabilized, the instrument analyzed gasoline samples 1, 2 and 3 in an automatic sequence. During the chromatographic operation, the analysis software searches the above "c:\hpchem\1\data\pona\Gasoline1" at a frequency of 10 seconds to see if there is a "report.txt". After the analysis is completed, the analysis software detects that there is a report The .txt...
example 3
[0141] In Example 2, the data file name is "Gasoline2" for the sample 2 to be tested. After the chromatographic analysis is completed, the analysis software automatically reads the data contained in the "report.txt" file under the path c:\hpchem\1\data\pona\Gasoline2 , converted into a file in database format, its eigenvalues are calculated in Table 21 according to Table 2, and it is judged as follows according to the eigenvalues: (1) The eigenvalue 17 retention time start value is less than 18min, and the end value is greater than 73min, it is judged to be a whole distillate oil (2) Eigenvalue 1 judges that normal alkanes are the largest peak in the set area, and has the characteristics of coker gasoline and straight-run gasoline; (3) judges that there are normal alkenes that appear in pairs with normal alkanes according to features 2 and 3, It has the characteristics of coking gasoline. The above eigenvalues meet the conditions of coking gasoline, and it is judged to be ...
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