Recycling of Flashed Gases into Synthesis

A small amount of valuable hydrogen and nitrogen are dissolved in product ammonia at synthesis pressure and flash out of solution as the product ammonia is reduced in pressure. Typically these flash gases are burned as fuel in the primary reformer. It may be possible to recycle them as feedstock by recompressing them by using the high pressure loop purge for motive energy in an ejector scheme (FAI, 2013).

Development Status Products
Commercial
Ammonia

Recycling of Flashed Gases into SynthesisCosts & Benefits

Parent Process: Ammonia Synthesis
Energy Savings Potential
CO2 Emission Reduction Potential
Costs

Not available.