Anhydrous Ammonia – the NOx reduction reagent of choice

Anhydrous Ammonia is undiluted Ammonia. It can be used directly with selective non-catalytic reduction (SNCR) and selective catalytic reduction SCR systems either in the gaseous form (most common) or it can be injected in the liquid state. Anhydrous Ammonia is usually stored under pressure (5-10 bar) or it can be stored at atmospheric pressure if kept at -33°C.

Why choose anhydrous ammonia as your SCR/SNCR NOx reduction reagent? 

Anhydrous Ammonia has advantages over ammonia solution and urea when lower NOx emissions are required. With proper storage, correct handling and understanding of the product, this reagent can be safely used.

For control of NOx, Yara recommends the use of Ammonia, where possible because of the advantages it has over alternative options It:

  • Offers highest efficiency and lowest transport cost because it contains 100% reactive component.
  • Reduces the tendency of formation of nitrous oxide and forms less carbon monoxide.
  • Is more effective than urea in high temperature SNCR systems.
  • Lessens the probability of fouling and corrosion in equipment downstream of the injection point.
  • Avoids the leakage issues with Urea solution that lead to white salt precipitates giving an ageing look to your equipment.

Why choose Yara to supply Anhydrous Ammonia?

Yara is a world leader in supply and safe transport of Ammonia in different states, producing over 7 million tons in 2016.

Most of our Ammonia is made from natural gas, the cleanest hydrocarbon source available.

Yara has been dealing with Ammonia for over a century, and we have an exemplary safety record, as safety is at the heart of all our operations. We are also happy to share our safety expertise with our customers.


Safe and reliable deliveries 

Anhydrous ammonia transport methods include: 

  • Tank truck 
  • Railcar 
  • Vessel / barge  
Hans Henrik Hanberg
Hans Henrik Hanberg
Sales Manager - Stationary and Marine reagents - Chemical Applications North Europe