Exercise 8

Exercise 8

Solve a problem on the material balance for the regenerator in Fluid Catalytic Cracking Process.

Material Balance for FCC Regenerator Problem

Burning the coke deposited on the catalyst particles generates all the heat necessary for catalytic cracking. Therefore, the coke burning rate is a critical parameter to control the rate of cracking. The composition of dry flue gas from the regenerator of an FCC unit is given in vol% as follows:

N₂: 81.6

CO₂:15.7

CO: 1.5

O₂: 1.2

The dry air flow rate to the regenerator is given as 593 SCMM (standard cubic meters per minute). Considering that a significant portion of coke is carbon, calculate the carbon burning rate in the regenerator in kg/min. Remember: 1 kgmole at STP = 22.4 m³)