Abstract Montmorillonites intercalated with silica, silica-alumina, silica-titania and silica-zirconia pillars by surfactant directed method were studied as catalysts for dehydration of methanol and ethanol to dimethyl ether as well as diethyl ether and ethylene, respectively. Moreover, the samples of montmorillonite intercalated with silica pillars were doped with aluminum using template ion-exchange method. In the case of all the samples deposited metal (Al, Ti, Zr) species were present in highly dispersed forms and resulted in generation of acid sites catalytically active in dehydration of methanol and ethanol. The best catalytic results in both studied processes were obtained for the samples doped with aluminum, especially introduced by using template ion-exchange method (first time applied for deposition of metal cations into PCHs), which were more catalytically active in the process of methanol to dimethyl ether conversion than γ-Al2O3 (one of the most important commercial catalysts of this process). High catalytic activity of the aluminum doped samples was related to the nature and strength of acid sites active in the processes of alcohols dehydration.

中文翻译：

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多孔粘土异质结构插入多组分柱作为醇脱水催化剂

摘要 研究了通过表面活性剂导向法嵌入二氧化硅、二氧化硅-氧化铝、二氧化硅-二氧化钛和二氧化硅-氧化锆柱的蒙脱石作为甲醇和乙醇脱水制备二甲醚以及乙醚和乙烯的催化剂。此外，使用模板离子交换法对嵌入二氧化硅柱的蒙脱石样品进行铝掺杂。在所有样品的情况下，沉积的金属（Al、Ti、Zr）物质以高度分散的形式存在，并导致在甲醇和乙醇的脱水中产生催化活性的酸性位点。对于掺杂铝的样品，在两种研究过程中都获得了最好的催化结果，特别是通过使用模板离子交换方法引入的（首次应用于金属阳离子沉积到 PCHs 中），在甲醇到二甲醚转化过程中，它们比 γ-Al2O3（该过程中最重要的商业催化剂之一）具有更高的催化活性。铝掺杂样品的高催化活性与醇脱水过程中活性酸位的性质和强度有关。