Question: a. How does their deactivation occur? b. How are cracking catalysts regen- erated? Q6 A sample of y-Al2O3 that was heated to 200 C, cooled,

a. How does their deactivation occur? b. How are cracking catalysts regen- erated? Q6 A sample of y-Al2O3 that was heated to 200 C, cooled, and then pre- treated with pyridine exhibits IR bands at 1540 and 1465 cm!. Explain this finding Q7 What instrument would you need to determine the state of reduction for an aluminasupported nickel catalyst? Q8 Recommend a method for doing routine measurements for comparison of acidiczeolites 09 Arrange the following catalysts by decreasing lifetime: a. Acidic zeolites (catalytic cracking) b. Pd/Al2O3 (selective hydrogenation of acetylene) c. Cu/ZnO/ALO3. Q10 Explain the term incipient wetness impregnation". Q11 How can skeletal metals be produced? Name a well-known example of this catalyst class

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