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

Abstract

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.

Inventors:

Siriwardane, Ranjani V.; Fan, Yueying

Issue Date:

Tue Jan 31 00:00:00 EST 2017

Research Org.:

National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1341897

Patent Number(s):

9557053

Application Number:

14/032,628

Assignee:

U.S. Department of Energy (Washington, DC)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J21/20 - Regeneration or reactivation
B01J23/00 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
B01J23/002 - {Mixed oxides other than spinels, e.g. perovskite}
B01J23/75 - Cobalt
B01J23/78 - with alkali- or alkaline earth metals
B01J23/8892 - {Manganese}

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C01B13/0203 - {from inorganic compounds}

C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10J - PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES

C10J2300/0916 - Biomass
C10J2300/093 - Coal
C10J2300/0956 - Air or oxygen enriched air
C10J2300/0966 - Hydrogen
C10J2300/0969 - Carbon dioxide
C10J2300/0976 - as steam
C10J2300/0993 - Inert particles, e.g. as heat exchange medium in a fluidized or moving bed, heat carriers, sand
C10J2300/1246 - by external or indirect heating
C10J3/725 - {Redox processes}

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23B - METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL

F23B7/00 - {Combustion techniques

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  {A CARRIER GAS OR} AIR 

F23C10/04 - the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
F23C2900/99008 - Unmixed combustion, i.e. without direct mixing of oxygen gas and fuel, but using the oxygen from a metal oxide, e.g. FeO
F23C99/00 - Subject-matter not provided for in other groups of this subclass

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E20/34 - Indirect CO2 mitigation, i.e. by acting on non CO2 directly related matters of the process, e.g. more efficient use of fuels

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

Y02P20/52 - using catalysts, e.g. selective catalysts

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Resource Type:

Patent

Resource Relation:

Patent File Date: 2013 Sep 20

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY