NOSTR - Non-Ideal Stirred-Tank Reactor

In this model of non-ideal reactor mixing, a fraction, fi, of the volumetric feed rate, F, completely by-passes the mixing in the reactor. In addition, a fraction, f2, of the reactor volume, V, exists as dead space. F3 is the volumetric rate of exchange between the perfectly mixed volume Vi and the dead zone volume V2 of the reactor. 

Note that the dead space volume is treated as having a uniform well-mixed composition. 

For a perfectly mixed tank with outlet concentration C4 and total volume V 

In this program FRACl is fi and FRAC2 is f2- Note also that while FRACl can be set to zero, FRAC2 cannot be set to zero without modifying the program, since the derivative value for C2 is divided by V2, which is then zero. 

Feed concentration Active zone concentration Deadzone concentration Effluent concentration Ideal tank concentration Total flow rate Fractional by-pass flow By-pass flow rate Dead volume fraction Deadzone exchange flow Rate constant Fractional conversion Fractional deadzone flow 

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