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

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Title: Ti-grafting functionalization on alkali-etched nanozeolites to enhance their catalytic performance toward oxidation desulfurization of fuels.
Authors: Feng, Yichen1,2 (AUTHOR), Li, Linghao2 (AUTHOR), Huang, Jian1,2 (AUTHOR) huangjian2@mail.sic.ac.cn, Wang, Wei2 (AUTHOR), Lu, Bowen2 (AUTHOR), Yang, Siyu2 (AUTHOR), Xu, Haiwei2 (AUTHOR), Shi, Ying1 (AUTHOR) yshi@shu.edu.cn, Hua, Zile1,2 (AUTHOR) huazl@mail.sic.ac.cn
Source: Microporous & Mesoporous Materials. May2025, Vol. 389, pN.PAG-N.PAG. 1p.
Subjects: Catalytic oxidation, Molecular size, Mass transfer, Sulfur compounds, Desulfurization
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. [Display omitted] • Hierarchical structure and abundant active sites obtained by the sequential alkali-etching and Ti-grafting process on S-1. • Notable desulfurization performance toward small or bulky refractory compounds simultaneously. • Completely removal of Th, BT and DBT by TS-1 prepared in the same manner. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
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. [Display omitted] • Hierarchical structure and abundant active sites obtained by the sequential alkali-etching and Ti-grafting process on S-1. • Notable desulfurization performance toward small or bulky refractory compounds simultaneously. • Completely removal of Th, BT and DBT by TS-1 prepared in the same manner. [ABSTRACT FROM AUTHOR]
ISSN:13871811
DOI:10.1016/j.micromeso.2025.113556