Reducing NOx with SNCR and SCR systems using Anhydrous Ammonia

Anhydrous ammonia means undiluted ammonia.  It can be used directly with SNCR and SNR 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.

Yara is a world leader in supply and safe transport of ammonia in different states, with one third of the ammonia traded around the world coming from Yara.  Anhydrous ammonia  is a hazardous material, but it can be handled safely by using equipment designed for this product and by correct storage. This requires following safety rules and legislation, which Yara can help you to include in your staff training  for handling and storing ammonia at your site. Yara has approximately a century of experience in the production and shipping of anhydrous ammonia; we can share our expertise in ammonia handling so that anhydrous ammonia can be a safe choice for you.

If you have specific questions related to ammonia, ask our NOx control expert .

For control of NOx, Yara recommends the use of ammonia, where possible:

Anhydrous ammonia has advantages over ammonia solution and urea when lower NOx emissions are required. With proper storage, correct handling and competence regarding ammonia properties, this reagent can be safely used  to turn NOx into harmless nitrogen and water in your SCR system. Some of the advantages to be mentioned are:

  • product contains 100% reactive component, thus offers highest efficiency and lowest transport cost

  • Less tendency of formation of nitrous oxide and less carbon monoxide formation

  • More effective than urea in high temperature SNCR systems

  • Reduced probability of fouling and corrosion in equipment downstream of the injection point

  • Leakage of Urea solution leads to white salt precipitates giving an ageing look to your equipment

Anhydrous ammonia transport means include:

  • Tank truck

  • Railcar

  • Vessel / Barge

If you have specific questions related to ammonia or urea, please ask our NOx control expert.

Safe handling of Anhydrous Ammonia used for NOx control:

Read more on how Yara can help you with proper handling of Anhydrous Ammonia.

NOx control inventory management and telemetry services

With our Yara telemetry solution, we can help you manage, and in some cases, optimize your SNCR and SCR reagent logistics. Our telemetry solution is a web-based remote monitoring system which:

  • increases security of supply of your NOx reduction reagent

  • simplifies reagent ordering and stock management

  • increases data management control

Increase your security of supply

Our telemetry system handles your reagent stock levels, triggering a delivery when your predefined level is met. All telemetry orders are automatically delivered, securing your supply, direct to you where you need it. This flexibility allows for your resources to fully focus on your other business needs. However, they can still be involved in the telemetry process, if required, so that you remain in control at all times.

Simplifies reagent ordering and stock management

Our telemetry solution provides you with an effective supply planning tool, which enables your reagent to be supplied on automatic request. This gives you an improved intervention capability via a fully transparent system, which also provides you with a complete overview of your stock levels and trends at all times.

Increases data management control

We can provide you with the installation of everything from tank level monitoring, to data collection and transfer, to a user friendly web-based monitoring system, which can be accessed from your process computers, office computers or smart-phones and tablets

The system is flexible, and can also be used to collect and monitor other measurement data, such as temperature, pressure or chemical sensors.

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