Method for determining octane number based on dielectric spectra technology

Abstract

The invention provides a method which is used for measuring the octane value of petrol, based on the dielectric spectroscopy, and which relates to a method which adopts the dielectric spectroscopy to build a correction model of petrol of different compositions. The model is used for measuring the octane value of petrol. The method includes the following steps: 1, collecting modeling samples and data of dielectric spectroscopy; 2, pre-treating the modeling samples and the data of dielectric spectroscopy; 3, classifying the modeling samples; 4, respectively building correction models of various categories according to the results of cluster analysis; 5, verifying and correcting the correction model; and 6, predicting the unknown octane of the samples. The octane value of petrol is an indicator which is used for measuring the anti-knock performance of the petrol. The measurement method of the octane value of petrol has significance in the production and application of the petrol. The method can rapidly and efficiently determine the octane value of petrol within 5 minutes; the detection process is conducive to environmental protection; the samples require no pre-treatment; the analysis has the advantages of high speed and high reliability; the method can be used conveniently; and the costs of analysis are low.

Description

technical field [0001] The invention relates to establishing an octane number correction model for gasoline with different compositions by using dielectric spectrum technology, and using the established model to measure the gasoline octane number. Background technique [0002] The invention relates to a method for measuring the octane number of gasoline, specifically, a method for measuring the octane number of gasoline by using the dielectric spectrum characteristic parameters of gasoline samples. [0003] The octane number of gasoline is an index to measure the anti-knock performance of gasoline, and its size directly affects the performance of motor gasoline. Increasing the octane number of gasoline in an economical and rational way in the refining process will produce huge economic benefits. People continue to explore and research from the aspects of raw materials, catalysts, processes, etc., trying to find the best way to increase the octane number of gasoline. Theref...

AI Technical Summary

Problems solved by technology

However, the ASTM-CFR octane test bench test method is subject to certain limitations in the production control and use of gasoline: (1) The test speed is slow, and it takes at least one hour to measure an octane number, so it cannot be fed back in time for production optimization Control; (2) Due to the large size of the ASTM-CFR octane number machine, a special laboratory is required, which is not conducive to on-site analysis; (3) The operation and maintenance costs are high, the equipment costs are high, and continuous maintenance is required during use; (4) Poor environmental protection, the consumption of test samples is large, about 500ml of gasoline samples are needed, and there are volatilization losses and pollution in the measurement process

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