def is the opposite; it gets rid of nitrogen oxides, which are strong oxidizers, not ammonia, which is a relatively strong reducer. in fact, def is made of urea, so if you heat it up enough, it will emit ammonia
what is 900F?
482 Celsius
755.372 Kelvin
1359.67 Rankine
Or 4.82 teas (boiling waters at Earth's mean sea level).
batman slap You cannot multiply a non-absolute measurement system like that!