The effective conversion of methanol toward high-added value molecules, such as dimethyl ether (methanol-to-dimethyl ether process, MTD), olefins (methanol-to-olefins process, MTO), or gasoline-cut hydrocarbons (methanol-to-gasoline process, MTG), is of paramount importance for the transition toward a methanol-based economy. In these processes, zeolites are efficient catalysts owing to their shape selectivity and tuneable acidity. Furthermore, the control of the crystal size of zeolites allows controlling the residence time of the involved species inside the catalytic crystal, with an effect on activity, product distribution, and coke deposition. This work focuses on the recent studies on the application of nanosized zeolites in MTD, MTO, and MTG processes. The results are critically discussed especially in terms of products distribution, coke formation, and deactivation. The methods to prepare the nanosized zeolites are also mentioned, although this aspect is beyond the scope of this review, which is to emphasize the impact of the crystal size on the zeolite-catalyzed methanol conversion reactions.

甲醇向高附加值分子的有效转化，例如二甲醚（甲醇制二甲醚工艺，MTD），烯烃（甲醇制烯烃工艺，MTO）或汽油馏分烃（甲醇制烯烃）汽油工艺（MTG）对于向基于甲醇的经济过渡至关重要。在这些方法中，由于其形状选择性和可调节的酸度，沸石是有效的催化剂。此外，控制沸石的晶体尺寸允许控制所涉及物质在催化晶体内部的停留时间，从而影响活性，产物分布和焦炭沉积。这项工作的重点是对纳米沸石在MTD，MTO和MTG工艺中的应用的最新研究。对结果进行了严格的讨论，尤其是在产品分配方面，焦炭形成和失活。还提及了制备纳米尺寸沸石的方法，尽管该方面超出了本综述的范围，其目的在于强调晶体尺寸对沸石催化的甲醇转化反应的影响。