期刊
FUEL PROCESSING TECHNOLOGY
卷 208, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.fuproc.2020.106520
关键词
Steam cracking; Dispersed catalyst; Molybdenum recovery; Heavy oil; Coke
资金
- [AAAA-A17-117041710075-0]
Recovery of molybdenum has been studied from coke formed as a by-product of catalytic steam cracking of heavy oil containing a Mo-based nanodispersed unsupported catalyst, and from mixtures of industrial coke with Mo-based compounds - as model systems, via combustion in the fluidized bed of deep oxidation catalyst and the fixed bed of coke (without a catalyst). Quantitative carbon removal was found to be impossible even for several cycles of combustion in fluidized catalyst bed, most probably due to a drop of size of the coke particles to those of too small in order to have a sufficient contact time for the complete burning off. Non-catalytic combustion in the fixed bed mode showed best efficacy resulting in complete carbon removal without any Mo losses in the range of 450-750 degrees C.
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