Description

The Depentanizer is intended to control the vapor pressure of finished gasoline by removing pentane from the FCC gasoline stream.  Pentane reduction is determined by the desired fuel specification.  The pentane would be stored and used as fuel gas.

The gasoline stream from the FCC is fed to the depentanizer column after heat exchange with the bottom product.  Overhead gas is condensed and accumulated in a receiver.  Reflux is returned to the column and pentane routed to storage.  The resulting low-RVP gasoline is cooled and sent to storage.

  

 

 

Tech Info and Drawings

 

• Design feed rate of 7,000 bpsd. 
• 82' column designed with 30 valve trays based on 18 theoretical stages and a 60% efficiency.
• The column diameter of 54" is based upon a flooding factor of 80%.
• The column was designed to operate at 41 psig for CAA Phase fuel and 28 psig for CARB Phase (California) fuel.
• Installed horsepower = 190
• 150 PSI seam consumption = 9,000 lb/hr
• Cooling water circulation = 251 gpm
• Designed and built by Bechtel in 1995, but never put into service.

 Depentanizer Column Drawings 173.04 Kb
 Depentanizer Column U-1 140.69 Kb
 Column Weights 21.94 Kb