Ti-grafting functionalization on alkali-etched nanozeolites to enhance their catalytic performance toward oxidation desulfurization of fuels

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-02-22 DOI:10.1016/j.micromeso.2025.113556

Yichen Feng , Linghao Li , Jian Huang , Wei Wang , Bowen Lu , Siyu Yang , Haiwei Xu , Ying Shi , Zile Hua

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Abstract

Using silicalite-1 and TS-1 nanozeolites as precursors, a new combination process consisting of sequential alkali-etching and Ti-grafting treatment has been designed for preparation of hierarchically structured titanosilicate catalysts. The alkali-etching process creates abundant mesopores and Si-OH groups in the nanozeolite precursors, effectively increasing the titanium loadings and accelerating the mass transfer during the reactions. Benefiting from the developed micro/mesoporous structures, the adjustable Ti loadings and the intrinsic hydrophobicity of precursor nanozeolites, the resultant catalysts demonstrate superior performance toward the catalytic oxidation desulfurization (ODS) of fuels, i.e. in 3 h, the complete conversion of thiophene (Th), benzothiophene (BT) and dibenzothiophene (DBT) which are three typical refractory sulfur compounds with diverse reducibility and molecule sizes in fuels.

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碱蚀刻纳米沸石上的钛接枝功能化以提高其对燃料氧化脱硫的催化性能

以硅酸钛-1和TS-1纳米沸石为前驱体，设计了序贯碱蚀刻和接枝钛的复合工艺，制备了结构有序的硅酸钛催化剂。碱刻蚀过程在纳米沸石前驱体中形成了丰富的介孔和Si-OH基团，有效地增加了钛的负载，加速了反应过程中的传质。利用纳米沸石前驱体的微孔/介孔结构、可调节的Ti负载和固有的疏水性，所制催化剂在燃料的催化氧化脱硫（ODS）方面表现出优异的性能，即在3 h内，噻吩（Th）、苯并噻吩（BT）和二苯并噻吩（DBT）这三种具有不同还原性和分子大小的典型难降解硫化合物在燃料中完全转化。

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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.