Influence of water content of single bio-oil droplet on combustion behavior

Abstract

Bio-oil, liquid fuel produced by decomposition of biomass material, has relatively high calorific value and has good storability and transportability. Furthermore, bio-oil fuel is expected to be applied to conventional combustion equipment such as boilers. Water content generated during the bio-oil manufacturing process is expected to reduce the calorific value of the fuel and affect ignition and combustion behavior. However, the effect of water on the droplet combustion behavior, which is often used industrially to burn liquid fuel, has not been clarified so far. In the present study, at first, bio-oil was produced in a fluidized bed pyrolysis furnace using cypress powder as a raw material, and the effect of the pyrolysis temperature on the water content of the bio-oil was investigated. Next, after the water content in bio-oil was adjusted, a single droplet of bio-oil suspended on a fine quartz rod was burned in a high-temperature furnace, and the effect of the water content on ignition and combustion behavior was investigated.