Abstract
US-Y zeolite was used to adsorb eight aromatic nitrogen compounds dissolved in hexane, hexane + hexadecane, hexane + naphthalene and hexane + hydrotreated shale oil. The total N concentration in an unspiked hydrotreated shale oil was reduced from 2000 to a few ppmw. The adsorbed N compounds were removed from the zeolite by combustion, allowing the zeolite to be reused. Zeolite adsorption may be used instead of severe hydrotreatment to remove residual nitrogen compounds.
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