Lecture 8 Tuesday 1/29/08• Block 1: Mole Balances on PFRs and PBRs• Must Use the Differential Form• Block 2: Rate Laws• Block 3: Stoichiometry

Pressure Drop: Liquid Phase Reactions. Pressure Drop Does Not Effect the Concentrations in Liquid Phase Rxns Gas Phase Reactions. Epsilon not Equal to Zero d(P)/d(W)=.. Polymath will combine with d(X)/f(W)=..for you Epsilon = 0 and Isothermal P=f(W) Combine then Separate Variables (X,W) and Integrate

Gas Phase Reaction. PBR Example 1: Polymath Solution A + 2B C Gas Phase Reaction. PBR Example 2: Analytical Solution A + B C + D

Mole Balance

Rate Laws

Stoichiometry

Isothermal Design

Heat Effects

2. Rate Law: –rA=kCA2

3: Stoichiometry