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2003 Course Catalysis (Elective I)

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Total No. of Questions : 12] P1315 [Total No. of Pages :4 [3664] - 280 B.E. (Chemical) CATALYSIS (2003 Course) (Elective - I) Time : 3 Hours] [Max. Marks:100 Instructions to the candidates: 1) Answers to the two sections should be written in separate answer books. 2) Neat diagrams must be drawn wherever necessary. 3) Figures to the right indicate full marks. 4) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) a) Explain the mechanism of homogeneous catalysis with suitable examples. [10] b) Explain the significance of catalyst activity and turnover number in heterogeneous catalysis. [8] OR Q2) a) Give a brief account of reaction feasibility with respect to activation energy and temperature in catalysis. [8] b) Write a note on various processes in petroleum refining explaining the role of catalysts. [10] Q3) a) b) Derive Langmuir - Hinshelwood model in engineering kinetics. [6] Kinetic experiments on the solid catalyzed reaction A 3R are conducted at 8 atm and 700 C in a basket type mixed reactor of 960 cm3 volume and containing 1 g of catalyst of diameter dp = 3 mm. 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] P.T.O.

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