A systematic model-based analysis of a downer regenerator in fluid catalytic cracking processes

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• 作者：Anon Chuachuensuk^a ; Woranee Paengjuntuek^b ; Soorathep Kheawhom^a ; ^c ; Amornchai Arpornwichanop^a ; ^c ; ^{Amornchai.A@chula.ac.th}
• 关键词：Model-based analysis ; Downer regenerator ; Fluid catalytic cracking ; Performance analysis
• 刊名：Computers and Chemical Engineering
• 出版年：2013
• 出版时间：11 February, 2013
• 年：2013
• 卷：49
• 期：Complete
• 页码：136-145
• 全文大小：1089 K

文摘

Performance improvement of a catalyst regenerator for gasoline production in a fluid catalytic cracking (FCC) process is needed to achieve higher burning efficiency. This study performed a systematic model-based analysis of a downer-type regenerator to recover the activity of FCC catalyst by using a one-dimensional model of the regenerator coupled with its hydrodynamic characteristics and the kinetics of catalyst regeneration. The results of a sensitivity analysis showed that higher carbon content on spent catalyst causes a higher regeneration temperature. The ratio of the recycled-to-spent catalyst flow rate in range of 1.0-3.5 and temperatures of the spent catalyst in range of 703.15-803.15 K have insignificant effects on the overall performance of the regenerator. The suitable superficial gas velocity and the spent catalyst flow rate are in range of 4-7 m s^?1 and 20-40 kg m^?2 s^?1, respectively.