Journal
POLYHEDRON
Volume 177, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2019.114291
Keywords
Heteropolyoxometalate; Nanocomposite; Phase-transfer catalyst; Oxidative desulfurization
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In this work, an efficient oxidative desulfurization (ODS) process of real gas oil and model oils was introduced using (TBA)(4)PW11Fe@TiO2@PVA phase-transfer catalyst. The catalyst was successfully prepared by the composition of the quaternary ammonium salt of mono iron-substituted phosphotungstate (abbreviated as (TBA)(4)PW11Fe), titanium dioxide (TiO2), and polyvinyl alcohol (PVA). The nanocomposite obtained was characterized through FT-IR, UV-vis, XRD, and SEM techniques. The spectroscopic characterization revealed that the (TBA)(4) PW11Fe was immobilized on the surface of TiO2@PVA. The results of catalytic tests showed the outstanding ODS performance of (TBA)(4)PW11Fe@TiO2@PVA in the removal of thiophenic compounds. Under optimized reaction conditions, the ODS efficiencies of benzothiophene (BT), dibenzothiophene (DBT), 4-methyldibenzothiophene (4-MDBT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) reach 96, 99, 97, and 98%, respectively. The desulfurization system can be recycled five times with merely a slight decrease in activity. (C) 2019 Elsevier Ltd. All rights reserved.
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