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2003 Course Reaction Eng. - II

3 pages, 24 questions, 0 questions with responses, 0 total responses,    0    0
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Total No. of Questions : 8] [Total No. of Pages : 3 [3664] - 323 P 1353 B.E. (Petrochemical) REACTION ENGINEERING - II Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any 3 questions from each section. 2) Answers to the two sections should be written in separate answer books. 3) Neat diagrams should be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) b) Explain what you mean by Langmuir - Hinshelwood kinetics? [4] Derive rate expression for the following catalytic reaction assuming surface reaction controls the overall rate [6] A + 2B R + S (g) c) (g) (g) (g) State (only) the rate expressions for the reaction in (b), assuming (i) Adsorption of B controls (ii) Desorption of R controls. (Useful form of rate expressions for kinetic data fitting only is expected without proof). [6] Q2) A small experimental packed bed reactor (w = 1 kg) using very large recycle of product stream gives the following kinetic data : A R, C A 0 = 10 mol / m 3 CA, mol/m3 1 2 3 6 9 5 20 65 133 540 0 , lit/hr Find the amount of catalyst needed for 75% conversion for a flow rate of 1000 mol A/hr with CA = 8 mol/m3. Using 0 a) Packed Bed Reactor with no recycle. b) Fluidized Bed Reactor. [16] P.T.O.

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