RT info:eu-repo/semantics/bachelorThesis
T1 Enhancement of redox properties of iron oxide through metal modification in catalyst  assisted chemical looping
A1 Santander de Soto, Laura
A2 Universidad de Valladolid. Escuela de Ingenierías Industriales
K1 Ingeniería química-Aspecto del medioambiente
K1 Energías renovables
AB The focus of this work is to investigate the behavior of bifunctional materials in catalyst assistedchemical looping process. Different ferrite (CoFe2O4 and NiFe2O4) materials modified byCeZrO2 were synthesized via co-precipitation method. Characterization was performed byseveral analytical techniques such as in-situ XRD, B.E.T., TEM-EDX, etc. The redox activityand stability at different temperatures (500oC and 750oC) were studied in order to determine themost stable bifunctional material. The chemical looping reforming was carried out in twostages, in the first step the bifunctional material was reduced by CH3OH or C2H5OH. In thesecond step H2O or CO2 were used for regeneration of to study the production of high purity H2and CO. Addition of CeZrO2 improved the redox behavior of ferrite materials. Among themodified ferrite materials CoFe2O4 were the best performing materials as they could reduce andreoxidize to the as prepared state. The most stable material was 20wt%CoFe2O4-CeZrO2 duringmethanol and ethanol chemical looping. NiFe2O4 supported materials suffered from deactivationdue to phase transformation as they could not cycle back to spinel (NiFe2O4) phase.
YR 2016
FD 2016
LK http://uvadoc.uva.es/handle/10324/18664
UL http://uvadoc.uva.es/handle/10324/18664
LA eng
NO Departamento de Ingeniería Química y Tecnología del Medio Ambiente
DS UVaDOC
RD 17-may-2024