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Title: Metal ferrite oxygen carriers for chemical looping combustion of solid fuels

Patent ·
OSTI ID:1341897
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The disclosure provides a metal ferrite oxygen carrier for the chemical looping combustion of solid carbonaceous fuels, such as coal, coke, coal and biomass char, and the like. The metal ferrite oxygen carrier comprises MFe.sub.xO.sub.y on an inert support, where MFe.sub.xO.sub.y is a chemical composition and M is one of Mg, Ca, Sr, Ba, Co, Mn, and combinations thereof. For example, MFe.sub.xO.sub.y may be one of MgFe.sub.2O.sub.4, CaFe.sub.2O.sub.4, SrFe.sub.2O.sub.4, BaFe.sub.2O.sub.4, CoFe.sub.2O.sub.4, MnFeO.sub.3, and combinations thereof. The MFe.sub.xO.sub.y is supported on an inert support. The inert support disperses the MFe.sub.xO.sub.y oxides to avoid agglomeration and improve performance stability. In an embodiment, the inert support comprises from about 5 wt. % to about 60 wt. % of the metal ferrite oxygen carrier and the MFe.sub.xO.sub.y comprises at least 30 wt. % of the metal ferrite oxygen carrier. The metal ferrite oxygen carriers disclosed display improved reduction rates over Fe.sub.2O.sub.3, and improved oxidation rates over CuO.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
Sponsoring Organization:
USDOE
Assignee:
U.S. Department of Energy (Washington, DC)
Patent Number(s):
9,557,053
Application Number:
14/032,628
OSTI ID:
1341897
Resource Relation:
Patent File Date: 2013 Sep 20
Country of Publication:
United States
Language:
English

References (7)

Development of a Novel Chemical-Looping Combustion: Synthesis of a Solid Looping Material of NiO/NiAl2O4 journal January 1999
Regeneration of complex metal oxides for the production of hydrogen patent November 2010
Investigation of Chemical Looping Combustion of Coal with CuFe2O4 Oxygen Carrier journal July 2011
Metal ferrite spinel energy storage devices and methods for making and using same patent March 2013
Manganese/Iron, Manganese/Nickel, and Manganese/Silicon Oxides Used in Chemical-Looping With Oxygen Uncoupling (CLOU) for Combustion of Methane journal October 2009
Evaluation of reaction mechanism of coal–metal oxide interactions in chemical-looping combustion journal November 2010
Cyclic Catalytic Upgrading of Chemical Species Using Metal Oxide Materials patent-application July 2008

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