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KINETICS - Kinetics Homogeneous Reaction In a homogeneous...

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Kinetics Homogeneous Reaction- In a homogeneous reaction, the reactants are spread evenly throughout the reaction tank. Activated sludge would possibly be an example of a homogeneous reaction whereas trickling filters would not. Batch System- No in and no out. Batch system can be in a complete mix or a plug flow condition. Example- a blender. General Mass Balance (1) Mass In + Mass Produced = Mass Out + Mass Accumulation Rate (2) ) ) QC Vr QC V dc dt i in co out ±= ± Q = Volumetric Flow Rate C = Mass Concentration V = Liquid Volume in Reactor r c = Rate of Mass Formation For Batch System Q = 0 (3) Vr V dC dt = or r dC dt = Consecutive Homogeneous Reactions ABC 12 →  1st order, irreversible µ 11 1 == kC r A µ = unit reaction rate µ 22 2 r B

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dC dt kC A A =− µ 11 dC dt B BA + + µµ 21 2 1 dC dt C B == µ 22 If C AO = initial A concentration, integration gives: () CC e e AA O kt −− 12 C kk ee B AO = 1 ke CA O =+ 1 1 Problem: derive if k 2 = k 1 Time C 1 / C AD A C B Note: we can vary relative concentration of A, B & C.
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KINETICS - Kinetics Homogeneous Reaction In a homogeneous...

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