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2003 Course Catalysis (Elective I)

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Total No. of Questions : 12] [Total No. of Pages : 3 [3864] - 329 P 1092 B.E. (Chemical Engg.) CATALYSIS (2003 Course) (409341) (Elective - I) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the two sections should be written in separate books. 2) Assume suitable data, if necessary. 3) Neat diagrams must be drawn wherever necessary. SECTION - I Q1) a) b) Discuss the mechanism of homogeneous catalysis with two examples. [8] Explain catalytic reaction feasibility with respect to activation energy and temperature. [8] OR Q2) a) b) Explain the role of supports in heterogeneous catalysis. [8] Derive the relationship between size, number and total surface area of the crystallites. [8] Q3) a) Explain the important characteristics of catalyst and their industrial [8] significance. b) Solid catalyzed reaction A 3R is conducted at 10 atm and 800oC in a basket type mixed reactor of 0.7 lit volume and containing 1g of catalyst of diameter dp = 3 mm. Pure A is fed at various rates into the reactor. Partial pressure of A in the exit stream is measured for each feed rate. Find the rate of reaction using the following kinetic results : [10] Feed rate, lit/hr 100 22 4 1 0.6 0.8 0.5 0.2 0.1 0.05 PA, out / PA, in OR Q4) a) b) Explain Eley-Rideal mechanism for surface reaction. [8] The catalytic reaction A 3R is run at 3 atm and 215oC in a PFR which contains 9 g of catalyst and uses a feed consisting of the partially converted product of 0.3 lit/min of pure unreacted A . Assuming the reactor to be a differential reactor, find a rate equation to represent this reaction, using the following results : P.T.O.

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