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Conversion and reactor sizing, pnr, batch, CSTR, pfr, thank you guys! -…
Conversion and reactor sizing
CSTR
- to determine volume necessary to achieve conversion X. The design equation for CSTR is:
The Volume in CSTR can be estimated from the graph
Steady state
Perfectly mixed
normally liquid phase
Batch reactor
- to determine time necessary to achieve conversion X
Small scale operation
testing new processes
manufacturing expensive products
Slow reaction, need long hours to complete
PFR
- To determine Volume necessary to achieve conversion X
Link Title
Area under the curve of Levespiel Plot( FA0/-rA vs X) = PFR volume !
4
numerical
methods to evaluate integral: (1) Trapezoidal method (2) SImpson's One third rule (3) Simpson's three Eight's rule (4)Five Points Quadrature Formula (
MOST ACCURATE)
Normally used for liquid and gas phase reaction
Steady state operation
Perfect mixing
PBR
-To determine catalyst weight necessary to achieve conversion X
Steady state Operation
Perfect Mixing (No spatial variation in radial direction, but in Axial Direction)
Reactor in Series
(*Only valid if there are no side streams)
We want to minimize the volume required to reduce cost during design
thank you guys!
