Discussion
Which of these is NOT true of selective non-catalytic reduction?
Answer: A
Correct answer: It achieves eighty to ninety per cent removal
That figure belongs to the catalytic route. Selective non-catalytic reduction achieves only 30 to 50 per cent, and its case rests entirely on the other three statements, which are true: no catalyst to buy, house or replace, hence a far lower capital cost, at the price of depending on a narrow furnace temperature window of roughly 850 to 1100 degrees.
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