Abstract

The review provides an analysis of the synthesis design features and the acidic and catalytic properties of MEL-type zeolites. Practicable methods for MEL zeolite synthesis are discussed, including one-step and two-step implementations of hydrothermal crystallization, crystal seed assisted synthesis, dual template synthesis, and vapor-phase crystallization to obtain nanocrystalline zeolites as isolated nanocrystals or binderless pellets. The study also provides an overview of methods for targeted control of the phase purity, chemical composition, crystal morphology/size, and acidic properties of MEL zeolite. Relationships are demonstrated between the MEL synthesis conditions and the catalytic properties of these zeolites in alkylation and disproportionation of aromatic compounds, oligomerization of lower olefins, oxidation of glycerol, amination of isobutylene, and conversion of lower alcohols.

中文翻译：

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MEL沸石：合成，性质和催化应用

摘要

审查提供了合成设计特征和MEL型沸石的酸性和催化性能的分析。讨论了MEL沸石合成的可行方法，包括水热结晶，晶种辅助合成，双模板合成和气相结晶的一步和两步实施，以获得纳米晶体沸石，其为分离的纳米晶体或无粘结剂颗粒。该研究还概述了有针对性地控制MEL沸石的相纯度，化学组成，晶体形态/大小和酸性性质的方法。MEL合成条件与这些沸石在芳族化合物的烷基化和歧化，低级烯烃的低聚，甘油的氧化，