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•  How can cycle time be optimised in needle coke production while refurbishing a fuel grade coker?

  Mar-2024

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Answers

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• Marcio Wagner da Silva, Petrobras, marciows@petrobras.com.br

  Considering the growth of electric vehicles and consequently the demand for batteries, the search to produce needle coke tends to rise. The needle coke production demands specific operating conditions of the delayed coking units like higher pressure in the reactors (around 4,0 to 8,0 kgf/cm2), higher temperature (500 to 510oC), higher recycle ratios (above than 60 %), and higher cycle time.

  A typical cycle time for fuel grade cokers is around 16 to 24 hours while e needle grade coker will demand cycle times around 32 to 36 hours aiming to ensure that the gas will be released from the solid coke creating the cavities which will ensure the anisotropic structure, required to the needle coke.

  It's impossible to produce needle coke applying conventional feeds like vacuum residue, it's necessary to feed high aromatic streams to the delayed coking unit. The decanted oil from FCC is one of the best alternatives to produce high quality needle coke.

   

  Apr-2024

• Marcio Wagner da Silva, Petrobras, marciows@petrobras.com.br

  Considering the growth of electric vehicles market and consequently the demand for batteries, the search to produce needle coke tends to rise. The needle coke production demands specific operating conditions of the delayed coking units like higher pressure in the reactors (around 4,0 to 8,0 kgf/cm2), higher temperature (500 to 510oC), higher recycle ratios (above than 60 %), and higher cycle time.

  A typical cycle time for fuel grade cokers is around 16 to 24 hours while e needle grade coker will demand cycle times around 32 to 36 hours aiming to ensure that the gas will be released from the solid coke creating the cavities which will ensure the anisotropic structure, required to the needle coke.

  It's impossible to produce needle coke applying conventional feeds like vacuum residue, it's necessary to feed high aromatic streams to the delayed coking unit. The decanted oil from FCC is one of the best alternatives to produce high quality needle coke.

   

  Mar-2024