No.2-13 金属イオンと低品位炭素資源の液固酸化還元反応を利用した高効率発電法

抄録

We have proposed a novel highly-efficient power generation method in which low-rank coal or biomass reduces liquid phase metal ions and subsequently electric power is generated by electrochemical oxidation of the reduced ions by air. Whereas power generation efficiency by brown coal or biomass using a conventional boiler is only 10–20 %, theoretical power generation efficiency of the proposed method can be estimated to be as high as 80 % if VO²⁺ or Cu²⁺ is employed as metal ions for example. We have recently showed that the reduction of candidate metal ions, VO²⁺, by low-rank coal or biomass can proceed at as low as around 250 °C. However, the reduction reaction was retarded before high conversions of VO²⁺ and low-rank coal or biomass were reached. In this study we performed a kinetic study to clarify the reason for the retardation.