Experimental study on the influences of operating parameters on the retention of potassium during the biomass combustion

Quantify the potassium in biomass combustion residues is an alternative way to study the release mechanisms of potassium which is essential to mitigate the ash-related problems while using biomass fuels. In this work, different combustion parameters were used to study the retention of potassium via high-temperature furnace balance system and then Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). Through the investigation, final temperature influences the retention of potassium the most, there is 80% of potassium left when temperature is 200℃, while this number sharply dropped to 42% when temperature reaches 1000℃. There is a little different of the retained potassium between the heating rate of 500℃/h and 1000℃/h at selected temperatures, while the high heating rate (1500℃/h) results in the 20% less of retained potassium compared to that of the heating rate of 1000℃/h. The influence of isothermal time is insignificant when temperature