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Title: Metal ferrite oxygen carriers for gasification of solid carbonaceous fuel

Patent ·
OSTI ID:1464450
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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, where MFe.sub.xO.sub.y is a chemical composition with 1.5.ltoreq.x.ltoreq.2.5 and 3.5.ltoreq.y.ltoreq.4.5 and M is one of Ca, Ba, and combinations thereof. For example, MFe.sub.xO.sub.y may be one of CaFe.sub.2O.sub.4, BaFe.sub.2O.sub.4, MgFe.sub.2O.sub.4. SrFe.sub.2O.sub.4 and combinations thereof. Mixing of the metal ferrite oxygen carrier and the solid carbonaceous fuel generates a product stream comprising at least 50 vol. % CO and H.sub.2. The MFe.sub.xO.sub.y may be supported on an inert support. In an embodiment, the MFe.sub.xO.sub.y comprises at least 30 wt. % of the metal ferrite oxygen carrier the inert support when present comprises from about 5 wt. % to about 60 wt. % of the metal ferrite oxygen carrier.

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):
10,030,204
Application Number:
14/870,051
OSTI ID:
1464450
Resource Relation:
Patent File Date: 2015 Sep 30
Country of Publication:
United States
Language:
English

References (9)

Method for removal of sulfur from coal in stoker furnaces patent November 1979
Inhibition of reflective ash build-up in coal-fired furnaces patent September 2003
Regeneration of complex metal oxides for the production of hydrogen patent November 2010
Tri-metallic ferrite oxygen carriers for chemical looping combustion patent October 2017
Development of a Novel Chemical-Looping Combustion: Synthesis of a Solid Looping Material of NiO/NiAl2O4 journal January 1999
Study and Improvement of the Regeneration of Metallic Oxides Used as Oxygen Carriers for a New Combustion Process journal December 2006
Manganese/Iron, Manganese/Nickel, and Manganese/Silicon Oxides Used in Chemical-Looping With Oxygen Uncoupling (CLOU) for Combustion of Methane journal October 2009
Investigation of Chemical Looping Combustion of Coal with CuFe2O4 Oxygen Carrier journal July 2011
Evaluation of reaction mechanism of coal–metal oxide interactions in chemical-looping combustion journal November 2010

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