Abstract

The study investigates the catalytic properties of microporous (H–Y) and micro-meso-macroporous (H–Y-mmm) FAU-type zeolites in the synthesis of 2-methyl-5-ethylpyridine (MEP) by the reaction of acetaldehyde with ammonia. At 150°C, an acetaldehyde to ammonia molar ratio of 1 : 3, and a catalyst content of 10 wt %, a MEP yield of 58% (0.95H–Y) and 63% (0.95H–Y-mmm) was achieved with a MEP selectivity of 91 and 93%, respectively. The examination of the catalyst stability revealed that hierarchical H–Y-mmm zeolites ensure a 100% MEP selectivity during 4–5 cycles with a slight decline in the catalytic activity, while H–Y zeolites are active during the first cycle only.

中文翻译：

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2-甲基-5-乙基吡啶的合成中的微孔和微介孔的Y沸石

摘要

该研究研究了乙醛与乙醛反应合成2-甲基-5-乙基吡啶（MEP）时，微孔（H-Y）和微介孔-大孔（H-Y-mmm）FAU型沸石的催化性能。氨。在150°C下，乙醛与氨的摩尔比为1：3，催化剂含量为10 wt％，MEP产率为58％（0.95H-Y）和63％（0.95H-Y-mmm） MEP选择性分别为91％和93％。催化剂稳定性的检查表明，分级的H-Y-mm分子筛在4-5个循环中可确保100％的MEP选择性，且催化活性略有下降，而H-Y沸石仅在第一个循环中具有活性。