26-08-2016, 11:40 AM
1444063808-fcc.pps (Size: 94.5 KB / Downloads: 15)
What is FCC?
Primary conversion process in petroleum refinery.
The unit which utilizes a micro-spherodial catalyst (zeolitic catalyst) which fluidizes when properly aerated.
The purpose is to convert high-boiling petroleum fractions (gas oil) to high-value, high-octane gasoline and heating oil.
Why use Circulating Fluidized Bed in FCC?
Compared with Fixed Bed, Fluidized Bed
CFB – fast fluidization regime
CFB good for catalyst size < 0.2 mm
Excellent in:
Gas-solid effective contact
Catalyst effectiveness
Catalyst internal temperature control
Catalyst regeneration
Operating Characteristics
Particle Diameter = 150 m
Geldart Classification = A
Temperature = 650 0C
Pressure = 100 kPa
Superficial gas velocity = 10 m/s
Bed depth = 0.85 m
Fresh feed flow rate = 300,000 kg/hr
Catalyst to oil ratio = 4.8
Why use Circulating Fluidized Bed in FCC?
Compared with Fixed Bed, Fluidized Bed
CFB – fast fluidization regime
CFB good for catalyst size < 0.2 mm
Excellent in:
Gas-solid effective contact
Catalyst effectiveness
Catalyst internal temperature control
Catalyst regeneration