dc.contributor | Melo, Dulce Maria de Araújo | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/9975840346577976 | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/3318871716111536 | |
dc.contributor | Lima, Andreia Cavalcante de | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/7456992068208495 | |
dc.contributor | Barros, Bráulio Silva | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/8938691250105531 | |
dc.contributor | Pimentel, Patrícia Mendonça | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/9303372770390061 | |
dc.contributor | Braga, Renata Martins | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/4603529162393328 | |
dc.creator | Peres, Ana Paula da Silva | |
dc.date.accessioned | 2016-01-05T20:52:08Z | |
dc.date.accessioned | 2022-10-06T12:19:36Z | |
dc.date.available | 2016-01-05T20:52:08Z | |
dc.date.available | 2022-10-06T12:19:36Z | |
dc.date.created | 2016-01-05T20:52:08Z | |
dc.date.issued | 2014-09-08 | |
dc.identifier | PERES, Ana Paula da Silva. Transportadores sólidos de oxigênio à base de níquel e cobre suportados em aluminatos para combustão do metano pela tecnologia de recirculação química. 2014. 120f. Tese (Doutorado em Ciência e Engenharia de Materiais) - Centro de Ciências Exatas e da Terra, Universidade Federal do Rio Grande do Norte, Natal, 2014. | |
dc.identifier | https://repositorio.ufrn.br/jspui/handle/123456789/19531 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3950113 | |
dc.description.abstract | In recent years, solid carriers suitable oxygen have been developed for use in different
chemical processes recirculation. The success of this technology is directly related to
the chemical reactivity and the oxygen storage capacity of the carrier. Thus, research
into the development of new materials that can be applied to the process becomes
extremely important. Possible candidates are the carriers based on nickel and copper for
presenting favorable thermodynamic properties. In this work, aluminates type MAl2O4
(M = Mg and Ca) and M0,9B0,1Al2O4 (B = Ni and Cu) that are used as supports were
synthesized by combustion reactions assisted by microwave and calcined at 900°C/2h.
Then, the carriers were impregnated with 10% (m/m) of nickel or copper, and
subsequently calcined at 600°C/2h to obtain the solid oxygen carriers, which were
characterized by X-ray diffraction (XRD) Microscopy scanning electron microscopy
(SEM) and temperature programmed reduction (TPR). Reactions simulating the
combustion process by chemical recirculation were performed by cycles
reduction/oxidation, in order to evaluate the reactivity of carriers. XRD analysis
revealed diffraction peaks of the spinel type structures. In the doped substrates were
verified the presence of secondary phases, suggesting that all the metal was
incorporated into the spinel structure. In solid oxygen carriers, the NiO and CuO phases
were observed after impregnation of active phases on different media. The results of
evaluations of chemical cycles reduction/oxidation revealed that TSO's impregnated
with nickel in various media were more active and are potential candidates for use in the
chemical recirculation technology | |
dc.language | por | |
dc.publisher | Universidade Federal do Rio Grande do Norte | |
dc.publisher | Brasil | |
dc.publisher | UFRN | |
dc.publisher | PROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIA E ENGENHARIA DE MATERIAIS | |
dc.rights | Acesso Aberto | |
dc.subject | Transportadores sólidos de oxigênio | |
dc.subject | Aluminatos | |
dc.subject | Combustão | |
dc.subject | Recirculação química | |
dc.title | Transportadores sólidos de oxigênio à base de níquel e cobre suportados em aluminatos para combustão do metano pela tecnologia de recirculação química | |
dc.type | doctoralThesis | |