Adiabatic plug flow reactors do not have provisions for steam generation within the
reactor. Instead, an LPG interbed quench is used to control the temperature rise within
the reactor with maybe as many as five catalyst beds being arranged within the vessel.
The product is sent to a flash drum in which partial condensation occurs, and the
liquid is sent to a stabilizer column. The bottom from this column is the final gasoline
product. With this type of reactor, the concentration of olefins in the feed is usually
limited to about 30%. From an energy point of view, it is less efficient than a tubular