TY  - JOUR
AU  - Vamvuka, Despina
AU  - Deli, Maria
AU  - Stratakis, Antonios
PY  - 2021
DA  - 2021/11/11
TI  - Effect of Mineral Additives on Fusion Behavior of Agricultural Residue Ashes during Combustion or Co-combustion with Lignite
JO  - Journal of Energy and Power Technology
SP  - 047
VL  - 03
IS  - 04
AB  - In this work, the conducted chemical, mineralogical, fusibility, and thermogravimetric analyses and calculated the slagging/fouling indicators for predicting deposition tendencies in boilers to study the ash fusibility behavior of selected agricultural residues and their blends with lignite. Two additives, bauxite, and clinochlore, were used at varying amounts to reduce ash melting, followed by examining their anti-fusion mechanisms. Initial deformation and softening temperatures of biomass materials were low for combustion processes operating above 900 °C due to their high concentration in K, Na, and P compounds. When the additives were mixed with raw fuels or lignite/biomass blends, the initial deformation of ashes started at temperatures up to 340 °C, whereas the fluid temperature in most cases exceeded 1500 °C. Bauxite was more effective than clinochlore. The positive impact of additives was attributed to the mineralogical transformations during ashing to phases with a high melting point through reactions with K, Na-bearing minerals, or CaO of fuel ashes.
SN  - 2690-1692
UR  - https://doi.org/10.21926/jept.2104047
DO  - 10.21926/jept.2104047
ID  - Vamvuka2021
ER  -