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Selective ring opening of multi-ring aromatics is a potential route for the production of valuable middle distillates from heavy oil, but a bi-functional (acidic and metallic) catalyst is required. We report here the use of mesoporous HY zeolites with variation of their mesoporosity to overcome diffusion resistance for bulky aromatics. NiW was impregnated on acidic zeolites for the metallic function...
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