TY - JOUR N2 - The impact of the fuel feeding mode (continuous or periodic with different stand-by/operation time ratios) on carbon monoxide (CO) and nitrogen oxides (NO, NOx) concentration values in the flue gas was analysed for coniferous wood pellet firing. Experiments were performed in a 25 kW water boiler equipped with an over-fed wood pellet furnace located in a full scale heat station simulating real-life conditions. Influence of oxygen concentration and temperature in the combustion chamber on carbon monoxide and nitrogen oxide concentrations was presented in diagrams. Dust and hydrocarbon concentrations were also monitored. It was concluded that the commonly used periodic fuel supply does not necessarily cause a significant increase of carbon monoxide concentration, as compared to the continuous fuel feeding mode. Continuous fuel supply can even induce higher carbon monoxide concentrations when fuel mass stream is not chosen properly. Each time new fuel type is used in a specific furnace, one should perform experiments to determine the adequate settings (stand-by/operation time ratio, fuel mass streams, air stream) to obtain the optimal, lowest possible emission for a certain boiler heat output L1 - http://journals.pan.pl/Content/84944/PDF/01-paper-Juszczak.pdf L2 - http://journals.pan.pl/Content/84944 PY - 2014 IS - No 2 June EP - 172 DO - 10.2478/cpe-2014-0012 KW - coniferous KW - wood pellets KW - combustion KW - emission KW - heat station A1 - Juszczak, Marek PB - Polish Academy of Sciences Committee of Chemical and Process Engineering DA - 2014 T1 - Concentrations of Carbon Monoxide and Nitrogen Oxides From a 25 kW Boiler Supplied Periodically and Continuously with Wood Pellets SP - 163 UR - http://journals.pan.pl/dlibra/publication/edition/84944 T2 - Chemical and Process Engineering ER -