Industrial Catalysis - October 2000

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Part A (20 x 2 = 40 Marks)
1. What are called negative catalysts? Give examples.
2. Name any two methods used for the removal of catalytic poison.
3. What are called carriers? Give examples.
4. What is called micro heterogeneous catalyst. Give examples.
5. Define contact time. Mention its usefulness.
6. Name the device used to collect the catalyst dust in the moving bed catalytic reactor.
7. Differentiate between catalyst and an initiator.
8. What is meant by selectivity?
9. Explain briefly Freundlich isotherm.
10. Differentiate between activated and inactivated chemisorption.
11. What is meant by diffusivity?
12. What is called enzyme catalysis? Give example.
13. How do the impurities present in the catalyst mixture affect the activity of catalyst?
14. How does the catalyst alter the activation energy?
15. Mention any two drawbacks encountered in filtering bed catalytic reactor.
16. What is meant by codeposition? Name any two catalysts prepared by this method.
17. How does the surface area influences the catalytic activity of catalyst? Explain.
18. Write down the Langmuir isotherm equation and explain the terms in it.
19. Suggest a catalyst for the dyhydrogenation of n-butane.
20. Write a short note on bimetallic catalyst. Part B (5 x 12 = 60 Marks)
21. (a) How are mixed oxide catalyst prepared? Or (b) Explain briefly the selection and preparation of catalyst for industrial hydrogenation process.
22. (a) Show that Al₂O₃ and K₂O are only promotors and they are not catalysts in the synthesis of Fe-Al₂O₃-K₂O system. Or (b) How do geometric and electronic factors influence the property of catalyst.
23. (a) Explain briefly the principle of differential and integral reactors, why is a differential reactor preferred to integral reactor for test purposes. Or (b) Explain briefly any two unit operations involved in the production of catalyst for reduction process.
24. (a) Describe briefly the production of cracking catalyst for petroleum products with the help of a flow chart. Or (b) How is reactivation of cracking catalyst carried out?
25. (a) Explain briefly the working principle of fluidized bed catalytic reactor. Or (b) Discuss the working principle of slurry reactors and mention their industrial applications.

Last Modified on: 04-Feb-2022

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