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Ammonia water solution 25%

Ammonia water solution 25% is an ammonia-based or urea-based chemical widely used in industry to reduce emissions of harmful oxides of nitrogen (NOx) gases from industry and combustion plants.

Ammonia Solution 25: a 25% ammonia-water solution

Stricter environmental requirements encourage decisive action to prevent the formation of smog and acid rain, which are harmful to nature and human health. Ammonia Solution 25​ helps to reduce the release of harmful nitrogen oxides into the atmosphere during the combustion process. These products, produced using special technologies, are widely used in the energy industry, cogeneration plants, industrial boilers, waste processing plants, cement kilns, and the shipping sector.

The main ways to reduce NOx emissions are SCR (selective catalytic reduction) and SNCR (selective non-catalytic reduction). Ammonia or urea solutions are injected into these systems to help reduce nitrogen oxide emissions by up to 95%.

When implementing pollution-reducing technologies, it is equally important to choose a high-quality reagent and a reliable supplier. 

Transporting Ammonia water solution 25%

Aqueous solution of ammonia up to 25% concentration. A solution based on lower concentrations of ammonia water is easier to transport and store. For these reasons, it is more often transported abroad.

The transport of the product must comply with the safety requirements of ADR / RID

  • ADR / RID class 8
  • UN identification number 2672
  • Packing class III
  • Classification code C5


Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code.

The bulk product is transported in accordance with Annex II MARPOL73 / 78 and the IBC Code. The Code does not apply to packaged goods.

What are nitrogen oxides (NOx)?

Nitric oxide (NOx) is a gaseous pollutant formed primarily during the combustion process. The main sources of nitrogen oxide (NOx) are mobile vehicles, boilers for electric power plants, cement kilns, industrial boilers, cogeneration plants, the glass industry, oil refineries. There are several forms of nitrous oxide gas (NOx): Nitric oxide gas (NO) Environmental effects: promotes acid rain. Human exposure: Causes headache, nausea, irritation to eyes and throat. Separately, NO is a colorless and odorless gas. These gases dominate the combustion process, accounting for more than 95% of NOx gas. 

Nitrogen dioxide (NO2) Effects on the environment: promotes the formation of ozone, smog. Human exposure: Causes respiratory failure. Nitrogen dioxide NO2 is a brown gas with a foul-smelling gas. These gases account for about 5% of NOx gas.

SCR system to reduce NOx emissions

The principle of operation of SCR (selective catalytic reduction) is based on the interaction of ammonia and harmful nitrogen oxide gas (NOx) in the presence of a catalyst. In the SCR system, the catalyst helps to reduce NOx emissions by as much as 95%.

The reduction reagent, Ammonia Solution 25​, is injected into the SCR system and mixed with the exhaust gas (NOx) in front of the catalyst. The gas mixture passes through the catalyst layers, where harmful gases (NOx) are converted into harmless nitrogen gases (N2) and water (H2O) vapors. A temperature of 300-350 ° C is required for the selective catalytic reduction process to be effective.

Why choose an SCR system? NOx gas emissions are reduced by up to 95%, so this technology allows to meet even the most stringent environmental requirements; The combustion temperature must be significantly lower than in the SNCR system.

SNCR system to reduce NOx emissions

The SNCR system (selective non-catalytic reduction), like the SCR system (selective catalytic reduction), is based on the interaction of Ammonia Solution 25​ with harmful nitrogen oxides (NOx). The SNCR system does not contain a catalyst, so it is crucial to select the right temperature regime to effectively reduce NOx emissions. 

Key factors in the efficiency of SNCR processes that reduce NOx emissions
  • Primary nitric oxide (NOx) concentration;
  • Exhaust gas temperature in the reaction zone;
  • Even exhaust temperature in the reaction zone;
  • Frequency of injection of ammonia water or urea solution;
  • Oven configuration on which the nozzle layout depends.


Why choose SNCR technology?

  • Implementation of SNCR technology requires much less investment than SCR system;
  • The system is installed quickly, thus avoiding operational downtime;
  • SNCR is a safe and reliable high quality technology;