Solid oxide fuel cells (SOFCs) are recognized for their fuel flexibility and high efficiency. While hydrogen is commonly used in SOFCs due to its environmental benefits and high power density, challenges like low energy density and safety risks exist. Direct fueling by alternative hydrogen carriers like methane and methanol is being explored to address these challenges. Studies on direct internal reforming of hydrocarbons and alcohols in SOFCs reveal varying performances and carbon deposition risks. Researchers are investigating strategies to mitigate carbon formation and optimize performance. Ternary phase diagrams are utilized to visualize carbon stability under different operational conditions. Recent studies focus on improving SOFC efficiency through factors like warming-up processes and exploring sustainable reformate-based fuels for enhanced performance. Overall, the research aims to identify the most suitable reformate for improving SOFC performance and efficiency.