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Chen Z, Wang G, Zhao S, Zhang L. Prediction of molecular distribution and temperature profile of FCC process through molecular-level kinetic modeling. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kiri Sivakumar KH, Aravamudan K. Simulation of a kinetic model integrated with variable catalyst holdup applied in industrial fluid catalytic cracking risers. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The importance of the axial catalyst holdup on the accurate prediction of reaction yields from Fluidized Catalytic Cracking Unit (FCCU) risers was explored in this study. The Kunii and Levenspiel model was incorporated in the FCCU riser simulations for predicting the solid holdup. Two approaches were compared – the popular one assuming Constant Holdup (CH) and the other incorporating Variable Holdup (VH) in the reaction kinetics models. Simulation predictions using these two approaches were fitted to the yield profiles obtained from industrial plant data reported in the literature. The kinetic parameter estimates, including frequency factors and coking parameters obtained from these two approaches, were quite similar, indicating insensitivity to catalyst holdup. However, the kinetic model incorporating VH expression could predict the plant conversion and yield to within ±10% error throughout the riser. In contrast, the CH model led to predictions that were rather erroneous (>±25%) at the riser bottom as the catalyst particle acceleration zone was neglected. Temperature, gas density, catalyst particle, and gas phase velocity profiles obtained from the VH approach were considerably different from those obtained using the CH approach. The VH approach showed that the slip factor, especially, was quite distinct as it reached a peak value before decaying exponentially. On the other hand, the CH model showed a monotonic increase in slip factor along the riser.
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Affiliation(s)
- K. Harish Kiri Sivakumar
- National Centre for Catalysis Research and Department of Chemical Engineering, Indian Institute of Technology Madras , Chennai , 600036, India
| | - Kannan Aravamudan
- Department of Chemical Engineering , Indian Institute of Technology Madras , Chennai , 600036 , India
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Numerical investigation of influence of treatment of the coke component on hydrodynamic and catalytic cracking reactions in an industrial riser. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2018.07.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Li M, Zheng Y, Li S. Moving Horizon Optimal Estimation for Temperature Distribution of FCCU Riser Reactor. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b01541] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mengying Li
- Key Laboratory of System Control and Information Processing, Ministry of Education, Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yi Zheng
- Key Laboratory of System Control and Information Processing, Ministry of Education, Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shaoyuan Li
- Key Laboratory of System Control and Information Processing, Ministry of Education, Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
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Lappas AA, Iatridis DK, Kopalidou EP, Vasalos IA. Influence of Riser Length of a Fluid Catalytic Cracking Pilot Plant on Catalyst Residence Time and Product Selectivity. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00547] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Angelos A. Lappas
- Chemical Process and Energy
Resources Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 6th km Harilaou-Thermi Road, 57001 Thermi, Thessaloniki, Greece
| | - Dimitrios K. Iatridis
- Chemical Process and Energy
Resources Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 6th km Harilaou-Thermi Road, 57001 Thermi, Thessaloniki, Greece
| | - Evie P. Kopalidou
- Chemical Process and Energy
Resources Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 6th km Harilaou-Thermi Road, 57001 Thermi, Thessaloniki, Greece
| | - Iacovos A. Vasalos
- Chemical Process and Energy
Resources Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 6th km Harilaou-Thermi Road, 57001 Thermi, Thessaloniki, Greece
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Liu J, Chen H, Pi Z, Liu Y, Sun H, Shen B. Molecular-Level-Process Model with Feedback of the Heat Effects on a Complex Reaction Network in a Fluidized Catalytic Cracking Process. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00320] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jichang Liu
- State Key Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hua Chen
- State Key Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhipeng Pi
- State Key Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yifeng Liu
- State Key Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hui Sun
- State Key Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Benxian Shen
- State Key Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, China
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