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2003 Course Catalysis Technology & Fluidization Eng.

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Total No. of Questions : 8] [Total No. of Pages : 2 P1098 [3864] - 371 B.E. (Petrochemical) CATALYSIS TECHNOLOGY & FLUIDIZATION ENGINEERING (2003 Course) (412411) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any three questions from each section. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must 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. SECTION - I Q1) a) With help of suitable example explain principle of Homogeneous Catalysis. [6] b) Discuss methods and means to regenerate activity of spent catalyst. [6] c) What are the Adsorption Isotherms? Explain their significances. Q2) a) [4] Differentiate between Riedel Model and Langmuir Hinshelwood Model for catalytic reaction. [5] b) What are promoter in catalysis - Discuss their functions. [5] c) What is Sintering? Explain with help of neat sketch. [4] d) Write a short note on catalyst support. [4] Q3) a) Describe precipitation method of catalyst manufacture with help of suitable examples. [6] b) How Characterization of Commercial Catalyst is done - Discuss in details. [6] c) What is dual activity catalyst - Explain with help of suitable example.[4] P.T.O. Q4) a) With help of neat sketch explain industrial manufacture of ammonia. Discuss in details on the catalyst used and the reactor type and geometry employed. [8] b) What are Zeolites? With help of neat sketch explain their shape selectivity. With help of real life example, explain how Zeolites have increased [8] industrial production many - fold. SECTION - II Q5) a) Write down six major advantages of fluidization and discuss them. [6] b) Discuss important parameters for classifying the fluidizing particles. [4] c) With help of diagram explain the fluidization process and how void fraction and pressure drop across bed changes during the process. [6] Q6) a) With help of Kuni - Levenspiel model explain inter-mixing and circulation within fluidized bed. [6] Qualitatively discuss Davidson s model for bubble with help of neat diagram. [4] With help of suitable diagram explain the different phenomena and regimes occurring in a fluidized bed with increase in gas velocity. [6] Explain the principle of immersed tube fluidized bed heat transfer medium. Highlight its advantage and disadvantages. [8] With help of neat sketch explain operational principle of modern FCC unit. Highlight its catalyst properties and operating conditions. [8] With help of suitable diagrams explain different types of fluidized bed dryers along with their applications. [6] What are the advantages of fluidized bed dryers over conventional ones? Explain each of them. [6] Write a short note on Particle Transport with major emphasis on carryover. [6] b) c) Q7) a) b) Q8) a) b) c) jjj [3864]-371 2

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