Development of new materials from waste electrical and electronic equipment : characterization and catalytic application.
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2017
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Resumo
Wastes of electrical and electronic equipment (WEEE) represent an important environmental problem,
since its composition includes heavy metals and organic compounds used as flame-retardants.
Thermal treatments have been considered efficient processes on removal of these compounds, producing
carbonaceous structures, which, together with the ceramic components of the WEEE (i.e. silica and alumina),
works as support material for the metals. This mixture, associated with the metals present in
WEEE, represents promising systems with potential for catalytic application. In this work, WEEE was
thermally modified to generate materials that were extensively characterized. Raman spectrum for
WEEE after thermal treatment showed two carbon associated bands. SEM images showed a metal
nanoparticles distribution over a polymeric and ceramic support. After characterization, WEEE materials
were applied in ethanol steam reforming reaction. The system obtained at higher temperature (800 C)
exhibited the best activity, since it leads to high conversions (85%), hydrogen yield (30%) and H2/CO ratio
(3,6) at 750C.
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Wastes of electrical and electronic equipment, Catalysis, Ethanol, Steam reforming
Citação
SOUZA, J. P. de et al. Development of new materials from waste electrical and electronic equipment: characterization and catalytic application. Waste Management, v. 65, p. 104-112, jul; 2017. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0956053X17302246>. Acesso em: 15 set. 2017.