Hierarchical structure was successfully created in YNU-5 zeolite by a direct base-treatment. Although the unmodified YNU-5 catalyst was significantly deactivated by heavy coking in hexane cracking, the dealuminated catalyst was much less deactivated. Furthermore, the mesopore/micropore hierarchical structure in the YNU-5 zeolite catalyst suppressed deactivation more than the non-hierarchical, dealuminated YNU-5 with a similar Si/Al ratio. An increase in hexane conversion was also observed for the YNU-5 with hierarchical structure.

中文翻译：

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YNU-5沸石分级结构的引入及其对己烷裂解催化性能的提高

通过直接碱处理在 YNU-5 沸石中成功创建了分层结构。尽管未改性的 YNU-5 催化剂在己烷裂解中因重度焦化而显着失活，但脱铝催化剂的失活要小得多。此外，YNU-5 沸石催化剂中的中孔/微孔分级结构比具有相似 Si/Al 比的非分级脱铝 YNU-5 更能抑制失活。对于具有分级结构的 YNU-5，也观察到己烷转化率的增加。