Fabrication of pillared MFI zeolite with enhanced stability in the alkylation of phenol and tert-butyl alcohol

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-04-27 DOI:10.1016/j.micromeso.2025.113666

Manna Wang , Xin Li , Yi Huang , Xingxing Zeng , Baoyu Liu

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引用次数: 0

Abstract

The 2D pillared MFI zeolite is fabricated through the vapor phase pillarization (VPP) strategy with additional TPAOH, the TPAOH species can enhance the stability of pillared MFI zeolite by generation of zeolite nanocrystals in MFI nanosheet assemblies, which could act as “zeolitic pillar” to support the multiple-layered structure of MFI zeolite rather than traditional amorphous silica pillar, resulting in the formation of multiple-layer MFI nanosheets with sturdy pillars, highly opened mesopores and accessible acid sites. Especially, the resultant pillared MFI zeolite (Cry-PMFI) can effectively suppress the attack of water molecules arising from the alkylation between phenol and tert-butyl alcohol, leading to robust stability that can inhibit the collapse of ordered multiple-layered structure. In addition, the resultant Cry-PMFI also shows extraordinary activity (>75 %) and excellent selectivity of 4-tert-Butylphenol (>71 %) compared with conventional silica pillared MFI zeolites. Moreover, the ordered multiple-layered structure of Cry-PMFI is well maintained during the alkylation reaction, leading to the extended lifetime and superior regeneration property. The obtained Cry-PMFI material with solid stability has potentially technological implications in the practical application of aromatic alkylation.

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增强苯酚和叔丁醇烷基化稳定性的柱状MFI沸石的制备

采用气相柱化（VPP）法制备了二维柱状MFI沸石，TPAOH通过在MFI纳米片组件中生成沸石纳米晶来增强柱状MFI沸石的稳定性，其可以作为“沸石柱”来支撑MFI沸石的多层结构，而不是传统的无定形硅柱，从而形成具有坚固柱状的多层MFI纳米片。高度开放的介孔和可接近的酸位点。特别是，所得到的柱状MFI沸石（Cry-PMFI）可以有效地抑制苯酚和叔丁醇之间烷基化引起的水分子的攻击，从而具有强大的稳定性，可以抑制有序多层结构的崩溃。此外，与传统的硅柱MFI分子筛相比，ry- pmfi还表现出非凡的活性（> 75%）和对4-叔丁基苯酚的优良选择性（> 71%）。此外，ry- pmfi在烷基化反应中保持了有序的多层结构，从而延长了使用寿命和良好的再生性能。所获得的具有固体稳定性的ry- pmfi材料在芳香族烷基化的实际应用中具有潜在的技术意义。

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.