Electric arc furnace dust as an alternative low-cost oxygen carrier for chemical looping combustion

Enhancement of Elemental Mercury Oxidation by Core–Shell CuCo2O4@SiO2 Oxygen Carrier with Strong Oxygen Release and Weak Adsorption Capacity in Chemical-Looping Combustion

“…CuO has the strongest oxygen release capacity, but CuO is prone to sintering at high temperatures, agglomeration after reduction, and thus has poor recycling performance . In recent years, spinel (AB 2 X 4 ) oxides have been continuously applied in several research fields, such as energy storage and environmental treatment, due to their magnetic property, high catalytic activity, and good chemical stability. − A series of spinel oxides have also been widely used as oxygen carriers in CLC processes due to the synergistic effect of their complex metal oxides. − Among the spinel-type oxides, cobalt-based spinel oxides have good activity, low cost, high stability, and environmental benefits. − CuCo 2 O 4 , constructed by replacing Co 2+ in the tetrahedral position in Co 3 O 4 with Cu 2+ , is a typical spinel structure. , At 900 °C, the mercury removal efficiency of CuCo 2 O 4 is 16% higher than that of Co 3 O 4 , and it reaches the maximum mercury removal efficiency faster (as shown in Figure S1). CuCo 2 O 4 has better oxygen release properties than Co 3 O 4 and can further improve the oxidation of mercury in the fuel reactor.…”