Browsing by Author "Al-Timimi, Buthainah Ali"

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Citation - WoS: 1
Citation - Scopus: 1
Comparative Simulation of PI and Fuzzy Control for Fluid Catalytic Cracking Unit
(Iranian Institute of Research and Development in Chemical Industries, 2025) Atiyaha, Safa Khalaf; Al-Timimi, Buthainah Ali; Ali, Ahmed Yaseen; Ahmed, Mohamed Salih; Albayati, Talib M.; Abdullah, Ghassan H.; Mel, Maizirwan; 01. Atılım University
The fluid catalytic cracking unit converts heavy feedstocks into more valuable gasoline and oil products, representing an essential component in refineries. The variables, including gas oil supply temperature (Tf), gas oil supply flow rate (Ff), and air temperature (Ta), are controlled and manipulated by this unit, which poses a significant challenge due to its complex interactions. To address these complexities, this study investigates the control of riser and regenerator temperatures (TR, TG) in an industrial Universal Oil Products (UOP) fluid catalytic cracking unit using proportional-integral and fuzzy logic controllers. The fuzzy logic controller, with five fuzzy sets generating 25 rules, is implemented through MATLAB simulation. The simulation program is formulated based on the principles of mass and energy balance of the unit. The performance of the controllers, including PI and fuzzy logic controllers, is evaluated and compared by introducing disturbances in the gas oil supply temperature, gas oil supply flow rate, and air temperature. The results show that the fuzzy logic controller outperforms the PI controller, exhibiting a lower integral absolute error. Compared to the PI controller, the fuzzy logic controller demonstrates improved performance, characterized by stable responses and shorter settling times. These findings highlight the effectiveness of the fuzzy logic controller in achieving better control performance for Fluid Catalytic Cracking Units (FCCU).
Citation - WoS: 1
Citation - Scopus: 1
Design of a Ratio Control Algorithm for a Fluid Catalytic Cracking System in an Universal Oil Product Context
(Maik Nauka/interperiodica/springer, 2024) Atiyah, Safa Khalaf; Aljanabi, Ahmed Yaseen Ali; Ahmed, Mohammed S.; Al-Timimi, Buthainah Ali; Mhmood, Ali H.; 01. Atılım University
This paper delves into the intricate dynamics of industrial fluid catalytic cracking, a pivotal process in refining universal oil products (UOP). At the core of this investigation is the endeavor to derive a comprehensive mathematical model that captures the essence of mass and energy balances within a UOP fluid catalytic cracking unit. The study's central objective is to explore and apply a ratio control algorithm in two distinct operational scenarios. In the first scenario, the ratio controller is strategically positioned after the control valve for the regenerator's input air, while in the second, it precedes the control valve. The primary focus here is the meticulous control of outlet temperatures for both the riser and regenerator reactors. Leveraging the capabilities of MATLAB software, the research methodically simulates the fluid catalytic cracking process. It introduces variables such as the gas oil feed rate, along with the temperatures of the gas oil feed and air, to rigorously test the efficacy of the proposed ratio control algorithm. The results of this investigation reveal a notable superiority of the ratio control in case one over case two. In the riser and regenerator reactors, this advantage is demonstrated by improved stability and operational efficiency, as evidenced by lower integral absolute error (IAE) readings and a quicker approach to the intended setpoint temperatures.