Baffle system for fluid catalytic cracking and methods for using same

A fluidized catalytic cracking stripping system, comprising:

• a vessel;
• a baffle arrangement suspended from an upper portion of the vessel, the baffle arrangement comprising:
• a first plurality of baffles arranged along a Y-axis and a second plurality of baffles arranged along a X-axis;
• a first baffle having a latitudinal centerline that is in a plane defined by the X and Y axes, the latitudinal centerline of the first baffle being oriented at a first angle from about 5° to about 80° with respect to the Y-axis;
• a second baffle axially offset from the first baffle along the Y-axis and having a latitudinal centerline in the plane that is oriented at a second angle from about 100° to about 175° with respect to the Y-axis;
• a third baffle axially offset from the second baffle along the Y-axis and having a latitudinal centerline in the plane that is oriented at a third angle from about 5° to about 80° with respect to the Y-axis;
• and
• a fourth baffle axially offset from the first baffle along the X-axis and having a latitudinal centerline in the plane that is oriented at the first angle;
• and
• a steam line coupled to the vessel and adapted to transfer steam to the vessel.

A method for stripping spent catalyst, comprising:

• separating a cracked effluent comprising a spent catalyst to provide a recovered spent catalyst and a cracked product;
• contacting the recovered spent catalyst with a baffle arrangement, comprising:
• a first plurality of baffles arranged along a Y-axis and a second plurality of baffles arranged along a X-axis;
• a first baffle having a latitudinal centerline that is in a plane defined by the X and Y axes, the latitudinal centerline of the first baffle being oriented at a first angle from about 5° to about 80° with respect to the Y-axis;
• a second baffle axially offset from the first baffle along the Y-axis and having a latitudinal centerline in the plane that is oriented at a second angle from about 100° to about 175° with respect to the Y-axis;
• a third baffle axially offset from the second baffle along the Y-axis and having a latitudinal centerline in the plane that is oriented at a third angle from about 5° to about 80° with respect to the Y-axis;
• and
• a fourth baffle axially offset from the first baffle along the X-axis and having a latitudinal centerline in the plane that is oriented at the first angle;
• and
• contacting the recovered spent catalyst and the baffle arrangement with steam;
• and
• separating hydrocarbons from the spent catalyst to produce a coked catalyst having a reduced concentration of hydrocarbons.