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Mid-infrared spectrum method for quickly identifying engine fuel type

A technology of infrared spectroscopy and fuel types, applied in the field of mid-infrared spectroscopy, can solve the problems of expensive instruments, weak environmental adaptability of mid-infrared spectroscopy instruments, quality inspection and type identification in difficult petrochemical industries, etc., to improve the ability to fight counterfeiting and avoid losses. Effect

Inactive Publication Date: 2014-06-18
PETRO OIL & LUBRICANT RES INST OF THE GENERAL LOGISITIC DEPT OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the weak environmental adaptability and expensive equipment of mid-infrared spectroscopy instruments, it is still difficult to use this technology for quality inspection and species identification in the petrochemical industry.

Method used

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  • Mid-infrared spectrum method for quickly identifying engine fuel type
  • Mid-infrared spectrum method for quickly identifying engine fuel type
  • Mid-infrared spectrum method for quickly identifying engine fuel type

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] Example 1: Identification of gasoline types

[0046] 1) Collect database samples

[0047] A total of 884 samples of gasoline, diesel and No. 3 jet fuel were collected from various refineries in my country, including 546 gasoline samples, including No. 90 ethanol gasoline, No. 93 ethanol gasoline, No. 97 ethanol gasoline, No. 90 motor gasoline, and No. 93 vehicle Gasoline and No. 97 motor gasoline; 238 samples of diesel oil, including No. 0 light diesel oil, -10 No. light diesel oil and -35 No. light diesel oil, No. 0 military diesel oil, -10 No. military diesel oil and -35 No. military diesel oil; 3 No. Jet Fuel 100 pcs.

[0048] 2) Determination of infrared spectra of database samples

[0049] Use TENSOR27 mid-infrared spectrometer to measure the mid-infrared absorption spectrum of database samples, spectral range: 600cm -1 ~4000cm -1 . Transmission sample cell, 0.1mm optical path, see the spectrum figure 1 .

[0050] 3) Type code, fingerprint area (719cm －1 ~129...

example 2

[0056] Example 2: Identification of Diesel Types

[0057] According to the method of Example 1, the database samples were collected, the infrared spectra of the database samples were measured, and the fuel type infrared spectrum database was established.

[0058] Select 20 diesel oil samples of known types and grades as the samples to be tested, the moving window is 29, and the moving window method is used to identify the types and grades. The results are shown in Table 2, and the recognition rate is 100%, which shows that the method of the present invention can be used. The infrared spectrum absorption spectrum and correlation coefficient spectrum overlay of sample 8 are shown in image 3 .

[0059] Table 2

[0060] sample

[0061] Sample 4

example 3

[0062] Example 3: No. 3 Jet Fuel Identification

[0063] According to the method of Example 1, the database samples were collected, the infrared spectra of the database samples were measured, and the fuel type infrared spectrum database was established.

[0064] Select the No. 3 jet fuel sample outside the library of 5 known types and grades as unknown samples, the moving window is 29, utilize the moving window method to carry out type and grade identification, the results are shown in Table 3, and the recognition rate is 100%, illustrating the method of the present invention can use. The infrared spectrum absorption spectrum and correlation coefficient spectrum overlay of sample 3 are shown in Figure 4 .

[0065] table 3

[0066] sample

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PUM

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Abstract

The invention discloses a mid-infrared spectrum method for quickly identifying engine fuel type. The method comprises the following steps: collecting a plurality of samples as a database sample; determining the infrared absorption spectrum in the database sample; and establishing a fuel infrared spectrum database. In order to identify the fuel type of the engine to be tested, the infrared adsorption spectrum of the engine fuel is determined firstly; subsequently the computer automatically selects the spectrum data in the appropriate section according to the infrared spectrum data; by adopting a movable window method, the correlation coefficient of the sample to be tested and each sample in the database are calculated; and the sample type with the maximum correlation coefficient is used as the type of the unknown sample. The method can quickly judge the engine type and determine the trademark within several minutes, can improve the fuel counterfeit combating ability, and can avoid the loss caused when the user uses the fuel mistakenly or uses the adulterate.

Description

technical field [0001] The present invention relates to a mid-infrared spectrum method for quickly identifying the type of engine fuel, in particular to a method for rapidly identifying unknown engine fuels as diesel, gasoline, and jet fuel by using mid-infrared spectrum technology combined with a moving window method, and determining their grades method. Background technique [0002] Different engine uses lead to a wide variety of engine fuels. For example, diesel engines use diesel power fuel, gasoline engines use gasoline power fuel, and aircraft engines use jet fuel. Various types of engine fuels are divided into different grades according to the conditions of use. For example, according to the use temperature, diesel oil is divided into grades such as No. 10, No. 0, -10 and -35. According to the anti-knock performance, gasoline is divided into No. 90, No. 93 and No. 97 grades. Various types and grades of fuel cannot be mixed, otherwise the engine will not run normal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/35G01N21/3577
Inventor 田高友褚小立熊春华鲁长波周友杰任连岭安高军
Owner PETRO OIL & LUBRICANT RES INST OF THE GENERAL LOGISITIC DEPT OF PLA
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