Hydrocracker feed specification

[LEMCS]

I wonder about hydrocracker (Hydrocracking Process) feedstock specification. Does anybody know practical values to be assumed for HCC run-length of 2 years ? Feedstock to be considered is vacuum gasoil and coker gasoil.

 

[25362]

From my old notes the influence of nitrogen in feedstock on zeolite-based catalysts was as follows:

ppm cat aging, ^oC/day

650 to 750 0.05 to 0.06
~1200 0.14

It appears that ammonia may neeutralize acid sites.