Quote:
Originally Posted by oil pan 4
all man made ammonia comes from natural gas
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So is most of the synthetic urea, such as what is used to make DEF. I don't remember how the reaction happens, but when the DEF is applied to the exhaust stream it turns into ammonia and then reacts with the NOx. Even though I don't hold my breath for any application of ammonia to vehicles to go mainstream, eventually it would make more sense to use in a way similar to those old fridges in order to replace a compressor-driven air conditioner.