Methanol gasoline quality detection method and system

Abstract

The invention discloses a methanol gasoline quality detection method and system, and the method comprises the steps: firstly preparing 51n + 1 samples composed of 1 methanol sample, 3n gasoline samples and 48n methanol gasoline samples, and then respectively constructing a Keans single-class classifier and a consensus model C_PLS based on the mid-infrared spectrums and Raman spectrums of the samples; and in the process of constructing the consensus model, screening a correction set for multiple times to construct a member model, so that the model construction precision is improved, and the mid-infrared spectrum and the Raman spectrum can be obtained through a Raman spectrometer and a mid-infrared spectrometer which are small in size; and the method has the advantages of convenience in outdoor measurement and capability of quickly and accurately detecting methanol content.

Description

technical field [0001] The invention relates to a methanol gasoline quality detection technology, in particular to a methanol gasoline quality detection method and system. Background technique [0002] Methanol gasoline is a mixture of methanol and gasoline. It is a new type of environmentally friendly fuel formulated according to a certain volume (mass) ratio of national standard gasoline, methanol and additives through strict procedures. In methanol gasoline, the amount of methanol blended (volume content) is generally 5% to 30%, of which 15% is the most. Methanol gasoline with a methanol blended amount of 15% is called M15 methanol gasoline. The toxicity of methanol gasoline combustion emissions is less than that of ordinary leaded gasoline, and the carbon monoxide content in the exhaust gas is also small, and the combustion cleaning performance is good. Methanol in methanol gasoline is not only an energy source, but also a gasoline quality improver and a green oxygenato...

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Problems solved by technology

However, these traditional methanol gasoline quality detection methods have problems such as complicated sample pretreatment, long detection time, inconvenient on-site detection, etc., and cannot meet the requirements of actual analysis.

The Chinese patent application with the patent publication number CN109374565A discloses a method for discriminating methanol gasoline and ethanol gasoline and determining its content. The method uses a laboratory desktop Fourier transform spectrometer, but the instrument is large in size and is not suitable for outdoor testing; in addition, When the product to be tested is doped with unknown components, the analysis technology provided by this patent cannot make a discriminative analysis of the unknown components, thus affecting the accurate prediction of methanol or ethanol content, and the detection accuracy is not high

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