During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH3 to NO is about ______________ percent?
Correct answer: D. 98
- A. 38
- B. 68
- C. 82
- D. 98
Explanation
With a platinum-rhodium catalyst, ammonia oxidation to nitric oxide is highly selective and typically achieves about 95 to 98% conversion. The value 98% therefore represents the normal industrial figure.
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