Inicio  /  ChemEngineering  /  Vol: 7 Par: 5 (2023)  /  Artículo
ARTÍCULO
TITULO

Numerical Analysis of Gas Hold-Up of Two-Phase Ebullated Bed Reactor

Riyadh S. Almukhtar    
Ali Amer Yahya    
Omar S. Mahdy    
Hasan Shakir Majdi    
Gaidaa S. Mahdi    
Asawer A. Alwasiti    
Zainab Y. Shnain    
Majid Mohammadi    
Adnan A. AbdulRazak    
Peter Philib    
Jamal M. Ali    
Haydar A. S. Aljaafari and Sajda S. Alsaedi    

Resumen

Due to the significant increase in heavy feedstocks being transported to refineries and the hydrocracking process, the significance of adopting an ebullated bed reactor has been reemphasized in recent years. The predictive modelling of gas hold-up in an ebullated two-phase reactor was performed using 10 machine learning methods based on support vector machine (SVM) and Gaussian process regression (GPR) in this study. In an ebullated bed reactor, the impacts of three features, namely liquid velocity, gas velocity, and recycling ratio, on the gas hold-up were examined. The liquid velocity has the most impact on the predicted gas hold-up, according to the feature significance analysis. The rotational-quadratic, squared-exponential, Matern 5/2, and exponential kernel functions integrated with the GPR models and the linear, quadratic, cubic, fine, medium, and coarse kernel functions integrated with the SVM model performed well during training and testing, with the exception of the fine SVM model, whose R2 is very low. According to the R2 > 0.9 and low RMSE and MAE values, the rotational-quadratic, squared-exponential, and Matern 5/2 GPR models performed the best.

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