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Title

Behavior of a manganese-iron mixed oxide doped with titanium in reducing the oxygen demand for CLC of biomass

AuthorsPérez-Astray, Antón; Mendiara, Teresa ; Diego Poza, Luis F. de ; Abad Secades, Alberto CSIC ORCID ; García Labiano, Francisco CSIC ORCID ; Izquierdo Pantoja, María Teresa CSIC ORCID ; Adánez Elorza, Juan CSIC ORCID
KeywordsCO2 capture
BECCS
Chemical looping combustion
Biomass
Manganese-iron-titanium mixed oxide
Oxygen carrier
Issue Date23-Feb-2021
PublisherElsevier
CitationFuel 292: 120381 (2021)
AbstractChemical Looping Combustion (CLC) is a promising carbon capture technology to contribute to the development of BioEnergy with Carbon Capture and Storage (BECCS) technologies. In CLC, the oxygen needed for combustion is supplied by a solid oxygen carrier. During the last years, intensive research has been conducted to identify potential oxygen carriers. Iron and manganese-based minerals allowed obtaining high CO2 capture efficiencies, but lower values for the combustion efficiency, that is, high oxygen demand values, due to the high content of volatiles in biomass. Manganese-iron mixed oxides doped with titanium possess the capability of releasing molecular oxygen under specific conditions which would enhance volatile conversion. The objective of the present work was to evaluate the potential of one of these materials ((Mn66Fe)-Ti7) to improve the combustion efficiency of CLC with biomass in a 0.5 kWth continuous CLC unit. Almost 100% of CO2 capture efficiency was obtained in all the experiments. Once the operational conditions for the synthetic material (Mn66Fe)-Ti7 were optimized, it was possible to reach oxygen demand values about 10% with the advantage that the (Mn66Fe)-Ti7 oxygen carrier presented magnetic properties that would facilitate its separation from biomass ashes in the fuel reactor.
Description7 figures, 5 tables.-- © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher version (URL)http://dx.doi.org/10.1016/j.fuel.2021.120381
URIhttp://hdl.handle.net/10261/232509
DOI10.1016/j.fuel.2021.120381
ISSN0016-2361
Appears in Collections:(ICB) Artículos

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