“…The measured gaseous compounds include CO, CO 2 , CH 4 , VOCs, and O 2 . The materials tested are mainly pellets of softwood, hardwood, blended wood, and straw–wood mixture ,,− ,,− and also include sawdust for pellet production, − wood chips, , wood bark, torrefied and steam explored wood pellets, , agricultural residues, switchgrass, and sewage sludge. , The temperature for the measurements ranges from room temperature to near the ignition point, covering the entire range of chemical oxidation contributing to self-heating prior to spontaneous ignition. The temperature inside the sample may be monitored mostly to ensure isothermal conditions ,, and seldom to detect self-heating.…”