Anhydrous Ammonia for NOx Control

Reducing NOx with SNCR and SCR systems using Anhydrous Ammonia

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

NOx control in SNCR and SCR systems using Anhydrous Ammonia is the most efficient NOx reduction

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.

Why use anhydrous ammonia?

Anhydrous ammonia has advantages over ammonia solution and urea where larger amounts of NOx reduction are required. With proper storage, handling and knowledge of ammonia properties, this reagent can be used without risk to convert NOx into nitrogen and water in your SCR system. The advantages of anhydrous ammonia, amongst others are:

• Anhydrous ammonia contains 100% of the reagent, thus provides high efficiency and low cost of transportation
• Less formation of nitrogen oxide and carbon monoxide
• Greater efficiency than urea in SNCR systems at high temperatures
• Reduced likelihood of contamination and corrosion downstream of the injection equipment

Safe and reliable deliveries

We can transport anhydrous ammonia throughout the world to your site by:

• Tanker truck
• Freight train
• Ship / barge

If you have specific questions about ammonia, please contact our expert NOx control.

Safe handling of anhydrous ammonia used for NOx control: Learn more about how Yara can help you to handle anhydrous ammonia safely.

Safe handling for Anhydrous Ammonia used in NOx control

Yara has been dealing with ammonia for over a century, and is a world leader in ammonia, with one third of the ammonia traded around the world coming from Yara. We have an exemplary safety record, as safety is at the heart of all our operations. If your staff need training on ammonia storage and handling, we can answer all your questions and organize training sessions.

Yara: the Ammonia expert for safe and reliable deliveries with optimized cost reduction

Yara is the largest ammonia producer in the world, offering unique expertise in ammonia handling and ammonia back-up supply. Most of our ammonia is made from natural gas, the cleanest hydrocarbon source available.

We transport ammonia around the world for many different process applications, including NOx control. Yara delivers the reagent of your choice from our unique network of plants offering a constant back-up in sourcing.

Yara can also offer Anhydrous ammonia dilution units close to - or at your site. This means:

• Anhydrous ammonia is transported to site, but the risk associated with storage can be reduced
• A dedicated ammonia dilution unit can be designed close to the clients plant
• Anhydrous ammonia is delivered to the unit by Yara, and then the unit takes care of the dilution process. The ammonia solution is then transferred into your plant for use in the NOx control reduction process

Ask our NOx control expert if you need more information on this dilution unit solution.

Read more about the alternative Ammonia choice: Ammonia Solution for NOx control