Method for measuring quality indexes of engine fuel by mid-infrared spectroscopy technology

A technology of infrared spectroscopy and quality indicators, which is applied in the field of measuring engine fuel quality indicators using mid-infrared spectroscopy technology, which can solve problems such as expensive instruments, weak environmental adaptability of mid-infrared spectroscopy instruments, and difficult quality inspection and type identification in the petrochemical industry.

Inactive Publication Date: 2013-03-27
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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  • Method for measuring quality indexes of engine fuel by mid-infrared spectroscopy technology
  • Method for measuring quality indexes of engine fuel by mid-infrared spectroscopy technology
  • Method for measuring quality indexes of engine fuel by mid-infrared spectroscopy technology

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0055] Example 1: Gasoline Quality Inspection

[0056] 1) Collection of database samples

[0057] 202 samples of gasoline were collected from various refineries in my country. Gasoline includes No. 90 motor gasoline, No. 93 motor gasoline, No. 97 motor gasoline, No. 90 ethanol gasoline, No. 93 ethanol gasoline and No. 97 ethanol gasoline, basically covering my country Gasoline oil sample.

[0058] 2) Determining the infrared spectrum of the training set samples

[0059] Use TENSOR 27 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 .

[0060] 3) Determination of quality indicators

[0061] Use standard methods to measure RON, MON, anti-knock index, 10% evaporating temperature, 50% evaporating temperature, 90% evaporating temperature, final boiling point, saturated vapor pressure, sulfur content, benzene content, aroma...

example 2

[0072] Example 2: Detection of Diesel Quality Index

[0073] 1) Collect database samples

[0074] 262 samples of diesel oil were collected from various refineries in my country. Diesel oil includes No. 0 light diesel oil, -10 No. light diesel oil and -35 No. light diesel oil, basically covering the diesel oil samples in my country, and used as samples to establish the database.

[0075] 2) Determination of infrared spectra of database samples

[0076] Use TENSOR 27 mid-infrared spectrometer to measure the mid-infrared absorption spectrum of database samples, spectral range: 600cm -1 ~4000cm -1 . Spectrum see figure 2 .

[0077] 3) Determination of various quality indicators of diesel oil by standard methods. Table 3 lists the units, standard methods, and reproducibility requirements of each quality index of diesel.

[0078] table 3

[0079] nature

unit

standard method

Reproducibility requirements

cetane number

GB / T386

3.3

...

example 33

[0087] Detection of quality index of jet fuel No. 33

[0088] 1) Collect database samples

[0089] 105 samples of No. 3 jet fuel were collected from various oil refineries in my country, basically covering the oil samples of No. 3 jet fuel in my country.

[0090] 2) Determination of infrared spectra of database samples

[0091] Use TENSOR 27 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 image 3 .

[0092] 3) Use standard methods to measure the quality indicators of No. 3 jet fuel. Table 5 lists the units, standard methods, and reproducibility requirements for each quality index of No. 3 jet fuel.

[0093] table 5

[0094] nature

unit

standard method

Reproducibility requirements

freezing point

℃

GB / T386

2.6

Flash point

℃

GB / T510

4

density

g / cm ...

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Abstract

The invention discloses a method for measuring quality indexes of engine fuel by mid-infrared spectroscopy technology. The method comprises the following steps that: a certain number of fuel samples are collected as database samples; mid-infrared absorption spectrums and the quality indexes of the database samples are measured and a fuel quantitative database is established; and for detecting the quality indexes of an unknown fuel sample, a user firstly measures the infrared absorption spectrum of the unknown fuel sample, spectrum data is led into the database by a computer, a sample with the similar infrared spectrum with the unknown sample is selected from the database to carry out fitting calculation so as to obtain each quality index. In the method, each quality index of gasoline, diesel fuel and jet fuel can be measured by one infrared spectrum. The method can be used for measuring the quality of the fuel on a site in field, so that the oil is ensured to be safely and normally used. The method can also be used for the quality supervision department to carry out on-site sampling inspection on the quality of the fuel, so that the capability of monitoring the quality of the fuel is improved and the loss caused by the application of unqualified fuel is avoided.

Description

technical field [0001] The invention relates to a method for measuring engine fuel quality indexes by using mid-infrared spectrum technology, in particular, relates to a method for rapidly measuring various quality indexes of diesel oil, gasoline and jet fuel by using mid-infrared spectrum technology combined with database technology. 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. Engine fuel quality is directly related to engine operating conditions. If unqualified fuel is used, the engine will work abnormally, and even cause engine failure, so the fuel quality needs to be strictly monitored. At present, the detection of engine fuel quality indicators mainly adopts the following mode: collect fuel samples from gas stations, then send them to the quality inspection department to measure each quality ind...

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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