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Multiple input self-organizing-map ResNet model for optimization of petroleum refinery conversion units |
Jiannan Zhu1, Vladimir Mahalec2, Chen Fan1, Minglei Yang1,3(), Feng Qian1,3() |
1. Key Laboratory of Smart Manufacturing in Energy Chemical Process, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China 2. Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L8, Canada 3. Engineering Research Center of Process System Engineering, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China |
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Abstract This work introduces a deep-learning network, i.e., multi-input self-organizing-map ResNet (MISR), for modeling refining units comprised of two reactors and a separation train. The model is comprised of self-organizing-map and the neural network parts. The self-organizing-map part maps the input data into multiple two-dimensional planes and sends them to the neural network part. In the neural network part, residual blocks enhance the convergence and accuracy, ensuring that the structure will not be overfitted easily. Development of the MISR model of hydrocracking unit also benefits from the utilization of prior knowledge of the importance of the input variables for predicting properties of the products. The results show that the proposed MISR structure predicts more accurately the product yields and properties than the previously introduced self-organizing-map convolutional neural network model, thus leading to more accurate optimization of the hydrocracker operation. Moreover, the MISR model has smoother error convergence than the previous model. Optimal operating conditions have been determined via multi-round-particle-swarm and differential evolution algorithms. Numerical experiments show that the MISR model is suitable for modeling nonlinear conversion units which are often encountered in refining and petrochemical plants.
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Keywords
hydrocracking
convolutional neural networks
self-organizing map
deep learning
data-driven optimization
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Corresponding Author(s):
Minglei Yang,Feng Qian
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Just Accepted Date: 17 January 2023
Online First Date: 06 March 2023
Issue Date: 17 May 2023
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