Page 217 - Fluid Catalytic Cracking Handbook
P. 217
Products and Economics 185
of the gasoline and LCO fractions. The rate of production and
olefinicity of the LPG will increase,
Increasing feed/catalyst mix zone temperature. Conversion and
LPG yield can be increased by injecting a portion of the feed, or
naphtha, at an intermediate point in the riser (see Figure 6-1).
Splitting or segregation of the feed results in a high-mix zone
temperature, producing more LPG and more olefins. This practice
30% of
Feed
70% of
Feed
Figure 6-1. A typical feed segregation scheme.
