Diesel cetane number measuring method based on dielectric spectrum technology
A technology of cetane number and dielectric spectrum, applied in measuring devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of slow test speed, complicated implementation, poor environmental protection, etc., and achieve the effect of accurate test cost
Inactive Publication Date: 2014-01-08
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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Problems solved by technology
[0008] The limitation of cetane index is reflected in: ①It is not suitable for fuel with cetane number improver
②Not applicable to pure hydrocarbons, synthetic fuels, alkylates, coking products, and distillate fuels derived from shale oil and oil sands
③If it is used in crude oil, residual oil and volatile products with final boiling point below 260°C, the correlation with cetane number is basically inaccurate
[0009] The cetane number determination method is complicated to implement, slow in test speed, low in economic benefit and poor in environmental protection
The cetane index calculation method mainly has the disadvantages of low test accuracy, obvious limitations, and low economic benefits. Therefore, it is of great theoretical and practical significance to study fast and efficient diesel cetane number and cetane index determination methods.
Method used
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Embodiment
[0061] Step 1: Collect a Representative Diesel Standard Sample
[0062] The national standard method GB / T386 "Determination of Diesel Ignition Properties (Cetane Number Method)" was used to measure the cetane number of diesel standard samples.
[0063] A total of 81 diesel standard samples were collected, including 41 ordinary diesel samples and 40 vehicle diesel samples, as shown in Table 1 below:
[0064] Table 1: List of Diesel Standard Samples
[0065]
[0066]
[0067] Step 2: Acquire Dielectric Spectroscopy Data of Diesel Standard Samples
[0068] (1) Test equipment
[0069] This method is applicable to various types of dielectric spectroscopy instruments. The instrument used in the present invention is a dielectric spectrometer developed by the School of Logistics Engineering. The "dielectric response signal" collected by the instrument is a dimensionless physical quantity, and its value reflects the size of the dielectric response of the measured sample at dif...
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The invention relates to a diesel cetane number measuring method based on dielectric spectrum technology. A cetane number calibration model based on diesel dielectric spectrum data is built, and diesel cetane number is measured fast by using the built calibration model. The method specifically includes the steps of firstly, collecting representative standard diesel samples; secondly, using a national standard method to measure cetane number of the standard samples; thirdly, collecting the dielectric spectrum data of the standard diesel samples; fourthly, building the diesel cetane number calibration model based on the dielectric spectrum data of the standard diesel samples; fifthly, verifying and correcting the calibration model; sixthly, predicting cetane number of unknown diesel samples. Cetane number is an important index indicating diesel ignition quality, so that diesel cetane number measuring method researches are significant for diesel production and application. When sample volume is low or engine testing conditions are not satisfied, diesel cetane number can be replaced by cetane index, and measurement according to the method can be performed.
Description
technical field [0001] The invention involves first establishing a cetane number correction model based on diesel dielectric spectrum data, and then using the established correction model to quickly measure the cetane number of diesel oil. When the sample size is small or the engine test conditions are not available, the cetane index can be used instead of the cetane number of diesel oil, and it can be determined according to this method. Background technique [0002] The invention is a method for measuring the cetane number of diesel oil by using the characteristic parameters of the dielectric spectrum of a diesel sample. When the sample size is small or the engine test conditions are not available, the cetane number of diesel oil can be replaced by the cetane index. According to this method to measure. [0003] The cetane number of diesel oil (cetane number CN) is an index indicating the ignition performance of diesel oil when it is burned in a diesel engine. A high ceta...
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IPC IPC(8): G01N27/00
Inventor 管亮冯新泸孔春心龚应忠
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA