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Unformatted text preview: Example No 10: Modeling Hirerachy System description 1. The reaction: Reversible reaction Forward rate constant k1 and reverse rate constant k2 B A 2 The forward reaction is 1.5 th order in A and the reverse reaction is 1 st order in B 2. Both gases are perfectly mixed 3. The reactor is filled with gases 4. The product stream flow out through a restriction valve 5. The feed stream has a density of and a mole fraction of y LEVEL 1 Constant temperature Constant physical properties Figure 1: Schematic for Level 1 i. Mass Balance Total Continuity equation system leaving mass system entering mass on accumulati mass of Rate F F dt d V * F and changes with time, need equation to describe them Component A balance Equation Rxn in consumed output Rate input Rate A of on accumulati mass of Rate Overall rate of reaction B 2 5 . 1 A 1 C k C k R mole disappearance of A = 2 Moles of Formation of B dt dn 2 dt dn b A B 2 5 . 1 A 1 A A A C Vk 2 C Vk FC C F dt dC V Concentration of reactant RT yP C A RT P y 1 C B LEVEL 2...
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- Spring '10
- Mass Balance, Trigraph, dt, mass accumulation, Continui ty equation