Extraction of molybdenum from spent cracking catalysts
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2019
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INTERNATIONAL MEETING ON RADIATION PROCESSING, 19th
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Resumo
A catalyst is a substance that changes the rate of a reaction. In the petroleum industry, the catalysts are
commonly used for Fluid Catalytic Cracking (FCC) and Hydro Catalytic Cracking (HCC), each of
them applied in a specific stage. These catalysts are used to facilitate the molecular chains cracking,
which will generate a mixture of hydrocarbons. However, the catalyst gradually loses its activity,
either by changing its original molecular structure or by its contamination from other petroleum
molecules. The application of ionizing radiation (medium-energy electron beam) over these spent
catalysts was studied to contribute the extraction of metals or rare-earths of high added-value. Tests
conducted with HCC catalysts were used the technique of electron beam irradiation (1.3 MeV) and
had as a subject the extraction of Molybdenum. Energy Dispersive X-ray (EDX) analysis was
performed on a Shimadzu EDX-720/800HS and X-ray Diffraction (XRD) analysis on a Rigaku
MultiFlex. Electron beam irradiation had a positive contribution if compared to traditional thermal and
chemical methods. In temperature around 750°C, HCC irradiated catalysts of the lower region have an
extraction of Molybdenum (MoO3) yield twice higher compared to non-irradiated ones, in other words
57.65% and 26.24%, respectively.
Como referenciar
KONDO, F.M.; DUARTE, C.L.; SOMESSARI, S.L.; SATO, M.I.; SALVADOR, V.L.R.; LIMA, N.B.; MARTINELLI, J.R.; CALVO, W.A.P. Extraction of molybdenum from spent cracking catalysts. In: INTERNATIONAL MEETING ON RADIATION PROCESSING, 19th, April 1-5, 2019, Strasbourg, France. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/32201. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.