Development of New Algorithm for Aniline Point Estimation of Petroleum Fraction

Kaiyue Wang,Shuguang Xiang,Xiaoyan Sun,Yushi Chen

doi:10.3390/pr7120912

Abstract

The aniline point (AP) is an important physical property of a petroleum fraction. The AP gives an indication of the aromatic hydrocarbon content in a hydrocarbon mixture and can also be an indicator of the ignition point of a diesel fraction. In this study, common estimation methods were introduced and evaluated, and their limitations were analyzed. Multiple linear regression was used in constructing a quantitative function to solve for the AP using the average boiling point and specific gravity. The iterative modification algorithm of the ternary interaction algorithm was used to obtain the predicted value of the petroleum fraction AP, and the proposed algorithm was tested using 127 actual petroleum fractions. The average estimation deviation of the proposed method was 3.55%; hence, compared to the commonly used estimation methods, the prediction accuracy was significantly improved. This method offers important practical value in the calculation of the petroleum fraction AP and other petroleum fraction properties, thereby providing reference significance.

Highlights

During the petroleum production process, the real-time monitoring of oil products is the most direct means of ensuring production safety and maintaining oil quality stability
The results demonstrated that these algorithms generally exhibited large deviations in the calculation of aniline point (AP)
The accuracy of the American Petroleum Institute (API) method was slightly higher than those of the other six methods, but the average relative deviation (ARD) of the AP calculation of the petroleum fraction was more than 5%

Summary

Introduction

During the petroleum (such as gasoline and diesel oil) production process, the real-time monitoring of oil products is the most direct means of ensuring production safety and maintaining oil quality stability. The aniline point (AP) [1] is defined as the lowest temperature at which an equal volume of aniline (C6H7N) is completely miscible with the tested sample. It is commonly used to estimate the aromatic content of petroleum, and it is important for determining the composition of petroleum fractions and the quality of petroleum products. Petroleum feedstocks with high APs have higher alkane contents and lower amounts of aromatics and naphthenes. APs can be used to calculate petroleum fraction properties, such as combustion heat, the hydrogen content, the diesel index, and the smoke point [2,3]

Methods

Results

Conclusion