Vanadium mobility in fluid catalytic cracking

This paper reports a study on which mechanism, particle-to-particle or vapor phase transport, is responsible for the mobility of vanadium in the FCC Unit. The approach used in this work is to measure the rate of vanadium transport to a basic oxide vanadium trap in fluid bed experiments. By varying the particle size distribution, the collision frequency can be changed and the rate of transport determined. Also, calculations of the mass transfer of a vapor species ina fluid are performed.