Reagents for NOx control

Reagents used in SCR and SNCR systems for NOx reduction

When choosing between an SCR and SNCR system to reduce NOx emissions, one of the first decisions to make is the choice of the reducing agent to be used in your system for NOx control.

This can be a complicated decision as you must take into account several parameters:

  • The location of your site 
  • The reagents delivery costs 
  • The suppliers of reagent nearby as well as the possible sources of back-up.

Yara has over a century of expertise in production, logistics, storage and handling of ammonia and urea. Today, we are the world leaders of ammonia production and distribution. We operate through a network of 30 production sites and 200 terminals worldwide. We share this expertise with you to help you make the right choice of reagent for your NOx reduction.

There are some important criteria to consider when choosing the type of reagent that suits you best:

  • What is your anticipated annual consumption of NOx reagent?
  • Can ammonia be easily delivered to your site? 
  • What is the level of knowledge of your staff in terms of handling chemicals? 
  • Can training on storage and handling of chemicals be implemented?
  • Will the storage site be in a residential area, or a site with lots of activity? 
  • What are the norms and local or national legislations regarding the handling of these chemicals?
Anhydrous ammonia for SNCR and SCR NOx control systems

Anhydrous ammonia for SNCR and SCR NOx control systems

Used with an SNCR or an SCR system, anhydrous ammonia gives the most effective NOx reduction results. However, due to the complexity and dangers of handling, its use should be considered in cases of high consumption and where there is the possibility of a suitable transport means.

Learn more about urea as reducing agents as well as SCR and SNCR systems.

You can also call our NOxCare experts in plant emissions control for any information or assistance required.