Indirect NOx emission monitoring in natural gas fired boilers
Aug 01 2017 · Element nitrogen contributing to NO x emissions originates from two sources i.e. bound organic nitrogen from fuel and elemental nitrogen (N 2) from air. Based on these nitrogen sources nitrogen oxides are formed in combustion by four different mechanisms: (1) fuel NO x mechanism (2) thermal NO x mechanism (3) prompt NO x mechanism and (4) via nitrous oxide (N 2 O).
The whats hows and whys of NOx emissions in commercial ...
The latest limits from Ecodesign in September 2018 reduced the emission level on all natural gas boilers up to and including 400kW to a level of 56mg/kW. This changed from net figures to gross. The previous best classification was Class 5 and stated at