Online Determination on the Properties of Naphtha as the Ethylene Feedstock Using Near-Infrared Spectroscopy

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Abstract

Providing real-time information on the properties of naphtha as the ethylene feedstock within the minimal time is significant for improvement of the process simulation, control, and real-time optimization. To develop models predicting naphtha properties for different pre-processing methods, an online full transmittance near-infrared (NIR) spectrum measurement system has been used along with the principal component regression and partial least squares (PLS) methods. The results show that the Savitzky-Golay smoothing combined with the first-derivative pre-processing provides the best denoising effect compared to other methods. The predicted relative errors of the NIR models developed by PLS, especially for the cutting temperature points of the test set, basically make 1‒5% indicating it can be used to create good NIR prediction models for the on-line determination of naphtha properties.

About the authors

Fan Chen

Key Laboratory of Smart Manufacturing in Energy Chemical Process, Ministry of Education, East China University of Science and Technology

Email: petrochem@ips.ac.ru
200237, Shanghai, China

Liu Tianbo

Sinopec Jinan company

Email: petrochem@ips.ac.ru
250102, Jinan, China

Hu Guihua

Key Laboratory of Smart Manufacturing in Energy Chemical Process, Ministry of Education, East China University of Science and Technology

Email: petrochem@ips.ac.ru
200237, Shanghai, China

Yang Minglei

Key Laboratory of Smart Manufacturing in Energy Chemical Process, Ministry of Education, East China University of Science and Technology

Email: petrochem@ips.ac.ru
200237, Shanghai, China

Long Jian

Key Laboratory of Smart Manufacturing in Energy Chemical Process, Ministry of Education, East China University of Science and Technology; Qingyuan Innovation Laboratory

Author for correspondence.
Email: longjian@ecust.edu.cn
200237, Shanghai, China; 362801, Quanzhou, China

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