CSTR and PFR volume calculator
Enter your values. The answer and the full worked solution update as you type.
Result
CSTR volume600 L
PFR volume153.5 L
CSTR/PFR3.909
Step-by-step solution
CSTR
V = v0·X/(k(1 − X)) = 10·0.9/(0.15·0.1) = 600 L
PFR
V = (v0/k)·ln(1/(1 − X)) = 153.5 L
Key formulas
- Space time
- τ = V/Q
- CSTR, first order
- τ = X/(k·(1 − X)), CA = CA0/(1 + kτ)
- PFR, first order
- τ = ln(1/(1 − X))/k, CA = CA0·e−kτ
- Conversion from volume
- CSTR: X = kτ/(1 + kτ), PFR: X = 1 − e−kτ
- N equal CSTRs in series
- X = 1 − 1/(1 + kτi)N
Practise Reactor sizing (CSTR & PFR)
A calculator gives the answer. In the exam you need the method: practise it with new problems, hints and worked solutions.