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Modeling and control of a naphtha thermal cracking pilot plant

Masoumi, M ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1021/ie050630f
  3. Publisher: 2006
  4. Abstract:
  5. A computer-controlled pilot plant has been constructed to study the dynamical behavior and control of the thermal cracking furnace. The governing equations that describe the furnace dynamics are presented, and, based on these equations and a kinetic model, software that simulates the steady-state behavior of the system has been developed. The furnace is divided into eight zones that can be heated independently, and, therefore, any desired temperature profile can be applied. The variables to be measured are the furnace zone temperature, coil outlet temperature (COT), and product yield. Two different control strategies (namely, COT control and furnace wall temperature control) are applied using digital proportional-integral-differential (PID) controllers. The results show that, by applying a predetermined temperature profile along the furnace wall in the wall temperature control strategy, the same yield that is obtained by COT control can be achieved with the lower maximum furnace wall temperature. Finally, based on a performance index, the optimal temperature profile has been obtained and it is applied to the pilot through the designed control system. © 2006 American Chemical Society
  6. Keywords:
  7. Computer software ; Coil outlet temperature (COT) ; Performance index ; Proportional-integral-differential (PID) controllers ; Wall temperature control strategy ; Cracking (chemical) ; Mathematical models ; Naphthalene ; Pilot plants ; Proportional control systems ; Reaction kinetics
  8. Source: Industrial and Engineering Chemistry Research ; Volume 45, Issue 10 , 2006 , Pages 3574-3582 ; 08885885 (ISSN)
  9. URL: https://pubs.acs.org/doi/10.1021/ie050630f