Study on the slagging behavior of bio-coal ash based on composition, ash fusion temperature, and calculated critical-viscosity-temperature

This study evaluates the slagging behavior of bio-coal gasification. The bio-coal pellets in this study were a mixture of coal, manure, and municipal waste with a fixed ratio of 70% coal. Ash composition, ash fusion temperature, and calculated Tcv are used to predict the slagging tendency in the sla...

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Hauptverfasser: Listiyowati, Lina Nur, Mubarok, Mohammad Zaki, Sanwani, Edy, Santoso, Imam
Format: Tagungsbericht
Sprache:eng
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Zusammenfassung:This study evaluates the slagging behavior of bio-coal gasification. The bio-coal pellets in this study were a mixture of coal, manure, and municipal waste with a fixed ratio of 70% coal. Ash composition, ash fusion temperature, and calculated Tcv are used to predict the slagging tendency in the slag gasifier. The coal used has a flow temperature value of 1180°C with a SiO2 content of 66.59% ash. The utilization of municipal waste and manure as a mixture of coal as raw material for gasifier feedstock based on the ash fusion temperature (AFT) of the mixture does not change the slagging behavior of the original coal. However, based on the chemical composition of the ash, mixing coal with municipal waste and manure has the highest slagging propensity. Meanwhile, the thermodynamic simulation results showed a decrease in the ash's melting point when manure and municipal waste were added at 300°C in a ratio of coal : municipal waste : manure mass ratio of 70:20:10, and at 250°C in coal : municipal waste mass ratio of 70:30. This decrease of the ash's melting point is due to the formation of mineral phases with low melting points, such as clinopyroxene and feldspar. Mixing coal with municipal waste is an attractive approach regarding coal gasification to reduce fuel costs and waste problems.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0186089