Abstract

Dimethyl ether (DME) is a promising multisource and multipurpose clean fuel and value-added chemical synthesized from syngas. This process can be either performed in a single stage (direct process) using a dual catalysis system or a two stage (indirect process) where syngas is first converted into methanol and then dehydrated to produce DME. While the dehydration reaction has been studied extensively over multiple decades, to date no review has been conducted on the catalysts involved in the methanol dehydration reaction. This work demonstrates the state of the art in catalyst preparation and analysis for this application. The dominant catalysts are studied extensively in this work, including γ-Al₂O₃ and various zeolites, such as ZSM-5, Y, beta and mordenite as well as their relevant modifications. Additionally, silica-alumina, mesoporous silicates, alumina phosphate, silicoaluminophosphates, heteropoly acids (HPAs), metal oxides, ion exchange resins and quasicrystals are discussed in this work, owing to the wide variety of catalysts available and studied for the purposes of methanol dehydration to DME.

中文翻译：

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甲醇脱水制二甲醚多相催化剂的研究进展

摘要

二甲醚（DME）是一种有前途的多来源，多用途清洁燃料和由合成气合成的增值化学品。该过程既可以使用双催化系统在一个阶段（直接过程）中进行，也可以在两个阶段（间接过程）中进行，其中合成气首先被转化为甲醇，然后脱水生成DME。尽管已经对脱水反应进行了数十年的广泛研究，但迄今为止，尚未对涉及甲醇脱水反应的催化剂进行任何评论。这项工作证明了该应用催化剂制备和分析的最新技术水平。占主导地位的催化剂在这项工作中广泛研究，其中的γ-Al ₂ Ø ₃以及各种沸石（例如ZSM-5，Y，β和丝光沸石）及其相关修饰。此外，由于可用于甲醇脱水的各种催化剂已被研究，因此在本工作中讨论了二氧化硅-氧化铝，中孔硅酸盐，磷酸铝，硅铝磷酸盐，杂多酸（HPA），金属氧化物，离子交换树脂和准晶体。到DME。