Abstract In this work, we show for the first time that high-silica zeolites (MFI, TON, MTT, and *MRE) could be synthesized from a combined strategy of both zeolite seeding and alcohol filling in the absence of organic structure-directing agents (OSDAs). High-silica ZSM-5 zeolites with Si/Al ratios ranging from 38 to 240 (TF-Al-ZSM-5) could be synthesized via this route. The key to the success of this technique was the employment of an aluminosilicate precursor with a fully 4-coordinated aluminum species as the initial source, wherein the rearrangement and condensation of the silicate species, rather than the aluminate species, occurred during zeolite crystallization. In addition, heteroatoms, such as Fe and B, could be incorporated into the zeolite frameworks. Catalytic tests for the methanol-to-propylene (MTP) reaction exhibited good catalytic performance for TF-Al-ZSM-5, which was comparable to that of the aluminosilicate ZSM-5 zeolite synthesized with OSDAs. Hence, this method offers viable opportunities for the industrial production and catalytic application of high-silica zeolites in the future.

中文翻译：

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在没有有机结构导向剂的情况下醇辅助合成高硅沸石

摘要 在这项工作中，我们首次表明，在没有有机结构导向剂的情况下，可以通过沸石晶种和醇填充的组合策略合成高硅沸石（MFI、TON、MTT 和 *MRE）。 （OSDA）。通过这种途径可以合成硅铝比为 38 到 240 的高硅 ZSM-5 沸石（TF-Al-ZSM-5）。该技术成功的关键是采用具有完全 4 配位铝物质的铝硅酸盐前体作为初始来源，其中在沸石结晶过程中发生硅酸盐物质而不是铝酸盐物质的重排和缩合。此外，杂原子，如 Fe 和 B，可以结合到沸石骨架中。甲醇制丙烯 (MTP) 反应的催化试验对 TF-Al-ZSM-5 表现出良好的催化性能，与使用 OSDA 合成的铝硅酸盐 ZSM-5 沸石相当。因此，该方法为未来高硅沸石的工业生产和催化应用提供了可行的机会。