Reduce NOx emissions from industrial sources

GPN Industrie & GPN Industry & Environment supports you through the process of smoke and fume treatment, by offering solutions designed to get rid of nitrogen oxides.

Nitrogen oxides (NOx) appear in monoxide (NO) or dioxide (NO2), nitrogen (N) forms. They occur from the high temperature reaction between nitrogen and oxygen in the air and are generated mainly by thermal combustion in various industries:

• waste incineration plants (WIP),
• thermal power plants,
• cement plants,
• glassworks,
• refineries.

NOx contributes to ozone formation in the lower layers of the atmosphere and has a role in increasing the greenhouse effect. To prevent risks to health and the environment, the European and national legislation on air emissions has been strengthened in all sectors: industries, construction, agriculture, transport.

GPN has considerable experience in treating the NOx emitted by industrial units and nearly one hundred installations benefit from our technology all over the world.

NOx treatment methods:

• SNCR (Selective Non-Catalytic Reduction) technology offers the best cost effectiveness ratio. It comes from reduction reactions occurring at high temperatures between 850 °C and 1050 °C.
• SCR (Selective Catalytic reduction) technology is more expensive but more effective. It reduces the NOx in the presence of a honeycomb-type catalyst in a moderate temperature range between 250 °C and 380 °C.

GPN Industrial & Environmental solutions: the GPNOx range

Reagents of high purity GPNOx® (GPNOX - A and GPNOX - U), suitable for the treatment of NOx are produced in our sites and benefit from the required quality conditions for their implementation

Le GPNOX - A is a solution obtained from ammonia and distilled water in a concentration of between 20 and 35%.

Le GPNOX - U is a solution obtained from ammonia and distilled water in a concentration of between 30 and 50%.

These products are injected into the exhausted gases and react with nitrogen oxides by releasing nitrogen (N2), water (H2O), naturally present in the atmosphere, and carbon dioxide (CO2) where urea is used.

Given the industrial usage constraints, these reagents must meet very specific purity standards.