关键词: 熔盐电解, 二氧化碳, 碳燃料, 资源化利用

Abstract: This paper investigated the production of fuel level carbon by electrolysis of molten carbonate mixture Li0.896Na0.625K0.479CO3 at high temperature and the regeneration of carbonate electrolyte by the intermediate products Li2O，Na2O，and K2O，with the absorption of CO2. The electrochemical properties of the reaction were analyzed by cyclic voltammetry and polarization curve. The effects of electrode material，reaction temperature，different current intensities and electrolytic time under same electric quantity in the reaction were also investigated. The surface morphology，composition and phase structure of the electrolysis products were characterized by SEM-EDS，TG/DTA，and XRD. The experimental results showed that the electrode potential decreased as temperature increased with a high electrode stability when Fe was used as cathode and Ni as anode. The preferable reaction temperature was 500 ℃. At the current intensity of 1.0 A and the electrolytic time of 1h，the current efficiency reached 65.98% and the obtained amorphous carbon was higher than 80%.

Key words: molten salt electrolysis, carbon dioxide, carbon fuel, resource utilization