# Reactor with Recycle Stream

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Mass balances are demonstrated for a reactor system. Pure is fed to the system and two parallel reactions take place in the reactor:

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Contributed by: Michael Wrobel (March 2014)

Additional contributions by: Rachael L. Baumann, Garret D. Nicodemus,John L. Falconer and Nick Bongiardina

(University of Colorado Boulder, Department of Chemical and Biological Engineering)

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

Pure is fed to the reactor where two parallel reactions occur:

(desired),

(undesired).

A separation unit splits the reactant from products and , and some is recycled back to the reactor. The recycle ratio is the ratio of the recycle flow rate to the fresh feed flow rate:

,

where is the recycle flow rate and is the fresh feed flow rate.

The yield is the percentage of the feed that is converted to the desired product :

,

where is the flow rate of the desired product .

The reactor selectivity is the ratio of the desired product to the undesired product :

,

where is the flow rate of the undesired product.

The reactor conversion is the percent of entering the reactor that is consumed:

,

where and are the flow rates of entering and exiting the reactor.

The overall conversion is the percent of the feed that is consumed:

,

where is the flow rate of exiting the reactor.

## Permanent Citation