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Unformatted text preview: Problem 5 A 1 Liter/sec flow of a 20% ozone80% air mixture passes through a plug flow reactor (PFR) at 1.5 atm and 93°C. Under these conditions ozone (O 3 ) decomposes by the following homogeneous reaction 20 3 30 2 , r ozone = k C ozone 2 k = 0.05 [Liter/mol . sec] What reactor size is needed for 50% decomposition of ozone? Problem 6. For the firstorder reaction A B on a CSTR, start from the CSTR design equation to derive the expression k = X/(1X) – What assumptions are made? Obtain τ an equivalent equation for the secondorder reaction 2A 5B (gas phase, feed is pure A). (a) F A0 X = k C A V So, v C A0 X = k C A0 (1X) V Since V/v 0 = τ Then, X = k (1X) τ And, X/(1X) = k. τ (b) F A0 X = k C A 2 V = X = k C τ A0 (1X) 2 / (1+1.5X) 2 So, X (1+1.5X) 2 = k C τ A0 (1X) 2...
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 Spring '14
 LanceL.Lobban
 Fluid Dynamics, Plasma, CaO

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