Mercury removal by Co3O4@TiO2@Fe2O3 magnetic core-shell oxygen carrier in chemical-looping combustion

• Magnetic Co 3 O 4 @TiO 2 @Fe 2 O 3 oxygen carrier was prepared by sol-gel and impregnation methods. • Mercury on oxygen carrier was measured by temperature programmed desorption. • Cl 2 generated from reaction was determined by methyl orange spectrophotometry. • Hg 0 removal mechanism by oxygen carrier in chemical looping combustion was uncovered. Mercury pollution has received much attention due to its severe harm to human and ecological...