Abstract
As a promising high-temperature fuel cell, the direct carbon fuel cell (DCFC) has a much higher efficiency and lower emissions compared with conventional coal-fired power plants. In the present DCFC system, four Australian coals from Central Queensland are successfully tested at 600–800 °C. The electrochemical performances of these coals are highly dependent on their intrinsic properties, such as chemical composition, surface area, concentrations of oxygen-containing surface functional groups and the nature of mineral matter in their ashes. Impurities such as Al 2O 3 and SiO 2 lead to an inhibitive effect during the anodic reaction in the DCFC, while CaO, MgO and Fe 2O 3 exhibit a catalytic effect on the electrochemical oxidation of carbon.
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