Factors Affecting Cenosphere Morphology in HFO Single Droplet Combustion

Paper from the AFRC 2016 conference titled Factors Affecting Cenosphere Morphology in HFO Single Droplet Combustion

To better understand cenosphere formation and differences between two types of cenosphere morphologies in HFO combustion. Falling droplet combustion inside a preheated furnace was done under a series of conditions and particulate matters are collected from the cooled exhaust gas. By using SEM, morphology of cenosphere samples can be characterized. Results show that air co-flow rate and entrance zone temperature inside furnace are the two main factors that affect the morphology of cenospheres. The morphology changes from porous shell to skeleton-membrane if air co-flow rate decreases from 150 lpm to 30 lpm or if entrance zone temperature decreases from 600 C to 250 C. Relatively high entrance zone temperature and high air co-flow rate are both required to generate cenospheres with porous shell structure.