Использование ультрастабильных цеолитов Y с различным содержанием натрия в качестве компонентов NiW/USY-ASA-Al2O3-катализаторов гидрокрекинга

Исследовано влияние содержания натрия в цеолите Y на его физико-химические свойства и на свойства катализаторов гидрокрекинга, приготовленных на его основе. Синтезирована серия образцов ультрастабильного цеолита Y с различным содержанием натрия. Образцы охарактеризованы комплексом физико-химических методов, таких как химический анализ, метод AES ICP, рентгенофазовый анализ, ТПД аммиака и ИКС адсорбированного пиридина. На основе полученных цеолитов приготовлены NiW-катализаторы гидрокрекинга, определены их физико-химические свойства, включая измерение кислотности методом ИКС адсорбированного пиридина, и проведены испытания в гидрокрекинге вакуумного газойля в режиме первой стадии. Показано, что увеличение содержания натрия в цеолите при- водит к значительному снижению концентрации БКЦ и увеличению концентрации ЛКЦ. При этом физико-химические и каталитические свойства катализаторов на основе цеолитов с различным содержанием натрия оказываются достаточно близкими. Следовательно, при используемой рецептуре приготовления катализаторов может быть применен исходный цеолит с содержанием натрия до 0,5 мас.% при неизменности каталитических свойств.

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