A review on ash formation during pulverized fuel combustion: State of art and future research needs

摘要: Solid hydrocarbon fuels—coal and biomass are commonly used for large-scale heat power generation worldwide. The solid incombustible ash, residing from combustion, leads to several operational issues. Ash-related problems such as slagging, fouling, corrosion, erosion (all resulting in boiler efficiency reduction), emissions of particulate matter reuse or disposal captured ashes, may restrict future use the said fuels. above mentioned technical bottlenecks closely related with fuel combustion process characteristics, during process, particle undergoes physical chemical transformations, which all depend on both ash chemistry well technology. transformations include volatilization, fragmentation, reactions, nucleation, coagulation, homogeneous/heterogeneous condensation, All these processes play a role formation submicron through coarse-sized particles generated. present paper provides synthesis available information typical characteristics operating parameters responsible final size distribution based critically reported investigations modeling efforts date. addressed review mineral composition its association (mineralogy), particles’ size, shape density, char structure etc. Also reviewed is interrelation between essential understanding transformations. Descriptions variety analytical methods applied quantify also covered, including recognition date (from simple calculations advance numerical simulations).