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08-Lect-Design Batch Reactor0

# 08-Lect-Design Batch Reactor0 - Outline 1 Design Structure...

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1 Chemical Reaction Engineering - Musgrave Isothermal Reactor Design Lecture 8 - Page 1 Outline: 1. Design Structure for Isothermal Reactors (Fogler 4.1) 2. Scale-Up of Liquid-Phase Batch Reactor Data for CSTR Design (Fogler 4.2)) Next Time: (Fogler 4.3) 1. Stoichiometry and Flow Reactors (Fogler 4.3) Chemical Reaction Engineering - Musgrave Isothermal Reactor Design Lecture 8 - Page 2 CRE Algorithm 1. Choose mole balance 2. Choose rate law 3. Stoichiometry 4. Combine relationships from steps 1, 2, and 3 5. Evaluate expression a. Analytically b. Graphically PFR CSTR Batch 1. Mole Balance (Design Eqn) 3. Stoichiometry Flow Batch Liquid Gas Liquid Gas 4. Combine dV=dV(X) dt=dt(X) 5. Evaluate V=V(X) t=t(X) 2. Rate Law -r A =f(C A ) -r A =g(C A ) -r A =h(C A )

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2 Chemical Reaction Engineering - Musgrave Isothermal Reactor Design Lecture 8 - Page 3 PFR CSTR Batch 1. Mole Balance 2. Rate Law -r A =f(C A ) -r A =g(C A ) -r A =h(C A ) 3. Stoichiometry Flow Batch 4. Combine 5. Evaluate dV=dV(X) dt=dt(X) V=V(X) t=t(X) Liquid Gas Liquid Gas dV = F A 0 dX r A V = F A 0 X r A dt = N A 0 dX r A V 1. Mole Balance r A = k A C A r A = kC A 1 + k A C A r A = k C A 1 K C C C C D 2. Rate Law V = F A 0 k A C A 0 1 + ε X ( ) dX 1 X ( ) 0 X = F A 0 k A C A 0 1 + ε X ( ) ln 1 X ( ) + ε X [ ] 5. Evaluate dV = F A 0 dX r A dV = F A 0 dX k A C A dV = F A 0 1 + ε X ( ) P 0 TdX k A C A 0 1 X ( ) T 0 P 4. Combine C A = F A υ C A = N A V υ = υ 0 υ = υ 0 1 + ε X ( ) P 0 T PT 0 V = V 0 1 + ε X ( ) P 0 T PT 0 V = V 0 C A = C A 0 1 X ( ) C A = C A 0 1 X ( ) 1 + ε X ( ) T 0 P P 0 T C A = C A 0 1 X ( ) 3. Stoichiometry Liquid Gas Liquid Flow Batch Liquid or gas Example: Determine X for a gas phase simple first order irreverisble reaction occuring in a PFR at constant T and P. Chemical Reaction Engineering - Musgrave Isothermal Reactor Design Lecture 8 - Page 4 PFR CSTR Batch 1. Mole Balance 2. Rate Law -r A =f(C A ) -r A =g(C A ) -r A =h(C A ) 3. Stoichiometry Flow Batch 4. Combine 5. Evaluate
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08-Lect-Design Batch Reactor0 - Outline 1 Design Structure...

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