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2003 Course Catalysis (Elective I)

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Total No. of Questions : 12] P1365 [Total No. of Pages : 3 [3764]- 329 B.E. (Chemical Engineering) CATALYSIS (2003 Course) (409341) (Elective - I) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the different sections must be written in separate answer books. 2) Assume suitable data, if necessary. SECTION - I Q1) a) b) Explain the mechanism of heterogeneous catalysis with suitable examples. [8] How homogeneous and heterogeneous catalysis is industrially useful?[8] OR Q2) a) b) Q3) a) b) Give a brief account of reaction feasibility with respect to activation energy and temperature in catalysis. [8] Explain the role of supports in heterogeneous catalysis. [8] Derive the relationship between size, number and total surface area of the crystallites. [8] Kinetic experiments on the solid catalyzed reaction A 2R are conducted at 8 atm and 700oC in a basket type mixed reactor of 640 cm3 volume and containing 1 g of catalyst of diameter dp = 3mm. Feed consisting of pure A is introduced at various rates into the reactor. Partial pressure of A in the exit stream is measured for each feed rate. Find a rate equation to represent the rate of reaction on catalyst of this size, using the following results: [10] Feed rate 100 22 4 1 0.6 litre/hr PA,out / PA,in 0.8 0.5 0.2 0.1 0.05 OR P.T.O.

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