Dataset for the assessment of NOx emissions from the combustion of various nitrogen-rich agricultural residues

The presented set of data contains experimental results from the combustion of various solid biofuels in a small-scale boiler. The biofuels were prepared from agricultural plant residues that included: 4 samples of <i>Melilotus albus</i>, 3 samples of <i>Papaver somniferum</i>, 1 sample of <i>Medicago lupulina, Medicago sativa</i> and <i>Sinapis alba</i>. The residues were processed into 8 mm pellets. Standardized spruce pellets were used as a reference material. The dataset includes basic fuel properties (moisture, ash and volatile matter content and LHV) and elemental composition (C, H, N, S, O). Compared to spruce pellets, the agricultural residues contain considerable amounts of nitrogen, and their combustion thus presents a potential environmental hazard. The combustion tests were carried out on an automatic pellet boiler with a bottom-feed retort burner. The emissions of NO_x were closely monitored and evaluated. The dataset serves primarily for the assessment of NO_x emissions from burning nitrogen-rich biofuels; however, other important parameters are included as well: CO, TOC emissions, O₂ content, flue gas temperature and boiler power output.