Using appropriate symbols to draw and label a schematic flow sheet for

the following process:

Catalytic reforming is a key process in the production of gasoline

components and aromatics for chemical industry. One type of

reforming process is Semi$-$Regenerative Reforming $($SRR$).$ SRR units

consist of several $(3$ or $4)$ adiabatic fixed$-$bed reactors in series with

intermediate heating.

The feed is preheated at $770K$ and sent to the first reactor. In this

reactor, the kinetically fastest reactions occur at $720K.$ These are the

dehydrogenation reactions of napthenes to aromatics to maintain high

reaction rates. The product gases are reheated in a furnace at $780K$

before being sent to a second reactor operating at $760K.$ Then reheated

to $790K$ and fed to a third reactor operating at $780K.$

The effluent from the last reactor is cooled by heat exchange with the

feed. Then hydrogen is separated from the liquid product and partly

recycled to the process. The net hydrogen production is used in other

parts of the refinery. The liquid product is fed to the stabilizer in which

the light hydrocarbons are separated from high$-$octane reformate.