Which end product is produced when NOx is reduced in an SCR system?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the Power Plant and Fuel System Exam with our comprehensive quiz. Use flashcards and multiple-choice questions with detailed explanations. Ace your exam with confidence!

Multiple Choice

Which end product is produced when NOx is reduced in an SCR system?

Explanation:
In SCR systems, NOx is reduced by using ammonia as a reducing agent in the presence of a catalyst. The NOx reacts with NH3 (and oxygen) to form nitrogen gas and water vapor, which are harmless to the atmosphere. This is why the end products are nitrogen and water. The reactions show NOx being converted to N2 and H2O rather than remaining as oxygen-containing species or forming ammonia as a final product. Ammonia would only appear in exhaust if there’s excess reductant (ammonia slip), not as the intended end product.

In SCR systems, NOx is reduced by using ammonia as a reducing agent in the presence of a catalyst. The NOx reacts with NH3 (and oxygen) to form nitrogen gas and water vapor, which are harmless to the atmosphere. This is why the end products are nitrogen and water. The reactions show NOx being converted to N2 and H2O rather than remaining as oxygen-containing species or forming ammonia as a final product. Ammonia would only appear in exhaust if there’s excess reductant (ammonia slip), not as the intended end product.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy