Molybdenum recovery from spent Mo-based dispersed catalyst accumulated in heavy oil steam cracking coke
| Autor: | Gleb A. Sosnin, Olesya O. Zaikina, Nikolay A. Yazykov, Vadim A. Yakovlev, P.M. Yeletsky |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering Metallurgy Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Coke Combustion Catalysis Cracking Fuel Technology 020401 chemical engineering chemistry Catalytic oxidation Molybdenum Fluidized bed 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Carbon |
| Zdroj: | Fuel Processing Technology. 208:106520 |
| ISSN: | 0378-3820 |
| Popis: | 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 °C. |
| Databáze: | OpenAIRE |
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