Which of the following is used as a catalyst in fluidised bed catalytic cracking ?
Correct answer: A. All A., B. and C.
- A. All A., B. and C.
- B. Silica-alumina
- C. Bentonite clays
- D. Silica-magnesia
Explanation
Fluidised-bed catalytic cracking uses acidic solid catalysts, historically including silica-alumina, silica-magnesia and activated clay materials such as bentonite. Therefore all three listed materials can serve as catalyst types in the conventional classification.
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