FER-type zeolite was recently recognized as good catalyst for DME synthesis via methanol dehydration or one-pot CO₂ hydrogenation, in terms of DME selectivity, stability and coke formation. In this research, we investigated the role of crystal size of both FER- and MFI-type zeolites on catalysis of methanol dehydration to DME reaction. The results show that FER-type zeolites, both micro- and nano-sized, exhibit better performances than micro-sized MFI-type zeolite. On the contrary, the application of nano-sized MFI allows to obtain a DME selectivity similar to FER, but with higher DME production rate and a lower coke deposition.

中文翻译：

---

甲醇脱水成二甲醚期间的MFI与FER沸石：晶体尺寸起关键作用

就DME选择性，稳定性和焦炭形成而言，FER型沸石最近被认为是通过甲醇脱水或一锅CO ₂加氢进行DME合成的良好催化剂。在这项研究中，我们研究了FER和MFI型沸石的晶体尺寸对甲醇脱水至DME反应的催化作用。结果表明，微米级和纳米级的FER型沸石都比微米级的MFI型沸石表现出更好的性能。相反，纳米MFI的应用允许获得类似于FER的DME选择性，但具有更高的DME生产率和更低的焦炭沉积。