Trimetallic Oxygen Carriers CuFeMnO4, CuFeMn2O4, and CuFe0.5Mn1.5O4 for Chemical Looping Combustion
2015
Fan, Yueying | Siriwardane, Ranjani | Tian, Hanjing
Several trimetallic ferrites with different ratios of Cu, Fe, and Mn were synthesized by direct decomposition method and tested for chemical looping combustion of methane, synthesis gas, and carbon. For comparison, several bimetallic ferrites were also tested, and NiFe₂O₄ and CuFe₂O₄ showed the best performance. During a 55-cycle test, trimetallic CuFeMnO₄ showed better overall performance than both NiFe₂O₄ and CuFe₂O₄, which had shown the best performance among the bimetallic ferrites for CLC of methane. From all the trimetallic oxygen carriers with different atomic ratios of Cu, Fe, and Mn, CuFeMnO₄, CuFeMn₂O₄, and CuFe₀.₅Mn₁.₅O₄ showed the best performance for CLC of methane. The oxygen carriers CuFeMnO₄, CuFeMn₂O₄, and CuFe₀.₅Mn₁.₅O₄, even without a support, showed very stable performance during a 100-cycle TGA test. The CuFeMnO₄ oxygen carrier also showed excellent performance during a multicycle CLC test with synthesis gas. CuFeMnO₄ is also suitable for CLC of a solid fuel, such as carbon, which showed stable performance during a 10-cycle test.
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