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Fixed-bed multi-tubular reactors for oxidative dehydrogenation in ethylene process

Fattahi, M ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1002/ceat.201300148
  3. Publisher: 2013
  4. Abstract:
  5. An industrial-scale reactor for ethylene production was modeled using the oxidative dehydrogenation of ethane (ODHE) in a multi-tubular reactor system, examining a variety of parameters affecting reactor performance. The model showed that a double-bed multi-tubular reactor with intermediate air injection scheme was superior to a single-bed design, due to the increased ethylene selectivity while operating under lower oxygen partial pressures. The optimized reactor length for 100% oxygen conversion was theoretically determined for both reactor designs. The use of a distributed oxygen feed with a limited number of injection points indicated a significant improvement on the reactor performance in terms of ethane conversion and ethylene selectivity. This concept also overcame the reactor runaway temperature problem and enabled operations over a wider range of conditions to obtain enhanced ethylene production
  6. Keywords:
  7. Fixed-bed reactor ; Mathematical modeling ; Mixed-oxide catalyst ; Ethylene production ; Fixed-bed reactors ; Mixed oxide ; Oxidative dehydrogenation of ethanes ; Oxidative dehydrogenations ; Oxygen conversions ; Oxygen partial pressure ; Reactor performance ; Dehydrogenation ; Ethane ; Mathematical models ; Optimization ; Oxygen ; Ethylene
  8. Source: Chemical Engineering and Technology ; Volume 36, Issue 10 , 2013 , Pages 1691-1700 ; 09307516 (ISSN)
  9. URL: http://onlinelibrary.wiley.com/doi/10.1002/ceat.201300148/abstract;jsessionid=16C22708B952E68463B5E13FD97BC794.f03t02