NDLI: Facile synthesis of Ti-TUD-1 for catalytic oxidative desulfurization of model sulfur compounds

Content Provider	Springer Nature Link
Author	Tanglumlert, Walairat Yang, Seung Tae Jeong, Kwang Eun Jeong, Soon Yong Ahn, Wha Seung
Copyright Year	2011
Abstract	A facile synthesis route for Ti-TUD-1 at room temperature employing silatrane and titanium glycolate as Si and Ti sources (2–8 mol%), respectively, over a triethanolamine template is proposed. XRD, N$_{2}$ adsorption–desorption isotherms, and TEM analysis confirmed disordered mesoporous structures with high surface area (715–824 m$^{2}$/g). According to the UV–visible spectroscopy of the calcined materials, titanium species of ca. 2.7 mol% Ti loading were present mostly in tetrahedral coordination for a sample prepared with 4 mol% Ti in the substrate mixture. Ti-TUD-1 showed catalytic activity in cyclohexene epoxidation, which depended on the amount of tetrahedrally coordinated Ti species. The hydrophilic nature of the surface of Ti-TUD-1 was confirmed by the effect of oxidant such that tert-butyl hydroperoxide (TBHP, 5–6 M in decane) was superior to other oxidants in water (cyclohexene conversion: TBHP in decane 36.5% vs. TBHP in water 30.6%). Ti-TUD-1 was more active in oxidative desulfurization (ODS) reaction than Ti-MCM-41 at the same Ti loading; the former produced 4,6-dimethyldibenzothiophene (4,6-DMDBT) conversion near 100% after reacting for 15 min, whereas Ti-MCM-41 produced final conversion of 4,6-DMDBT of 89% after reacting for 180 min. ODS over Ti-TUD-1 was influenced both by electron density and steric hindrance in model sulfur compounds. Partially polymerized Ti sites seemed to also contribute to the reaction.
Starting Page	1267
Ending Page	1273
Page Count	7
File Format	PDF
ISSN	09226168
Journal	Research on Chemical Intermediates
Volume Number	37
Issue Number	9
e-ISSN	15685675
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-09-10
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Silatrane Titanium glycolate Ti-TUD-1 Cyclohexene epoxidation Oxidative desulfurization Physical Chemistry Inorganic Chemistry Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry

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