Exercise 6: Solve a problem on the material balance for the regenerator in Fluid Catalytic Cracking Process.
Quiz 3. Will cover material in Lessons 6 and 7. Check the Syllabus, or Course Calendar for Quiz 3 schedule.
Solve a problem on the material balance for the regenerator in Fluid Catalytic Cracking Process.
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 (excluding water) from the regenerator of an FCC unit is given in vol% as follows:
Gas | Volume % |
---|---|
N2 | 81.6 |
CO2 | 15.7 |
CO | 1.5 |
O2 | 1.2 |
The dry air (excluding moisture in the 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)
In previous offering of this course, I have noted a serious weakness in the students' understanding of how to carry out simple mass balances. Here a few reminders and hints to solve this problem:
Once you have a solution to the exercises, you will submit your answers as a PDF by uploading your file to be graded. The MS Word, or Excel files should be saved as a PDF before submitting the exercise. Please Note: Scans of handwritten pages are not acceptable.