Thermochemical Study of Combustion Behavior and Ash of Hybrid Coal
Keywords:
Hybrid Coal, ash, slagging, fouling, FactSage, combustionAbstract
This study aims to analyze the thermochemical behavior of combustion and ash characteristics of hybrid coal, which is a mixture of low-rank coal (LRC) and biomass. The research focuses on evaluating ash composition and the potential for slagging and fouling under combustion conditions relevant to coal-fired power plants (PLTU). Simulations were conducted using FactSage software with the Equilib and Phase Diagram modules to determine ash melting fractions, thermodynamic equilibrium analysis, and the effect of temperature variations on ash chemical behavior.
The results indicate that the use of hybrid coal can improve combustion efficiency and produce ash with characteristics distinct from those of pure coal combustion. Minerals such as potassium and sodium in biomass influence ash melting points, thereby affecting the risk of slagging and fouling. From an economic feasibility perspective, hybrid coal was also analyzed in terms of production costs, which were compared to PLN’s basic cost of electricity supply (BPP). This study suggests that hybrid coal has significant potential as a more environmentally friendly and economical alternative fuel, provided that mitigation strategies for slagging and fouling are carefully addressed.
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