NOxcsökkentés

NOx redukció refers to the process of reducing nitrogen oxides (NOx) emissions. Nitrogen oxides are a group of gases, primarily nitric oxide (NO) and nitrogen dioxide (NO2), that are formed during high-temperature combustion processes. They are significant air pollutants contributing to smog, acid rain, and respiratory problems.

There are several methods employed for NOx reduction. In combustion systems, techniques like staged combustion and flue gas recirculation aim to lower peak combustion temperatures, thereby reducing the formation of NOx. Selective Catalytic Reduction (SCR) is a widely used post-combustion technology. In SCR, a reductant, typically ammonia or urea, is injected into the exhaust stream and reacts with NOx over a catalyst, converting it into harmless nitrogen gas and water.

Another post-combustion method is Selective Non-Catalytic Reduction (SNCR). This process also uses ammonia or urea but operates at higher temperatures than SCR and does not require a catalyst. The reductant is injected directly into the furnace or boiler.

NOx reduction is crucial for environmental protection and compliance with air quality regulations. Industries such as power generation, transportation, and manufacturing are major sources of NOx emissions, and implementing effective reduction strategies is vital for mitigating their environmental impact. The choice of NOx reduction technology depends on factors like the source of emissions, the required reduction efficiency, and economic considerations.