To explore the correlation between the performance of direct carbon fuel cells and the characteristics of semi-coke as the fuel, a strategy for adjusting the characteristics of semi-coke is employed by changing the coal pyrolysis conditions. It is found that the ratios O/C and H/C of semi-coke are decreased with an increase in the final pyrolysis temperature, a slowing of the heating rate and an extension of the pyrolysis residence time. In addition, CO₂ activation can increase the specific surface area of semi-coke. The performance of a direct carbon fuel cell increases with an increase in O/C and H/C in semi-coke. Meanwhile, the combustion characteristic index of semi-coke has a linear correlation with the maximum output power of a direct carbon fuel cell, so the combustion characteristic index can be used as a reference indicator for a direct carbon fuel cell to select solid carbon fuel.

为了探索直接碳燃料电池的性能与以半焦为燃料的特性之间的关系，通过改变煤的热解条件，采用了一种调整半焦特性的策略。发现随着最终热解温度的增加，加热速率的降低和热解停留时间的延长，半焦的O / C和H / C之比降低。另外，CO ₂活化可以增加半焦的比表面积。直接碳燃料电池的性能随半焦中O / C和H / C的增加而增加。同时，半焦的燃烧特性指标与直接碳燃料电池的最大输出功率具有线性关系，因此该燃烧特性指标可以用作直接碳燃料电池选择固体碳燃料的参考指标。