Journal
CHEMICAL ENGINEERING SCIENCE
Volume 225, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2020.115818
Keywords
In situ encapsulation; Heteropolyanion-based ionic liquid; UiO-66; Ionic liquid bridging; Oxidative desulfurization
Categories
Funding
- Project of National Natural Science Foundation of China, China [21878054]
- Fujian Province Department of Science & Technology, China [2019YZ017001]
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This work describes a novel approach for linking metal-organic frameworks (MOFs) to polyoxometalates (POMs) for use as effective heterogeneous catalysts in the oxidative desulfurization of fuel oil. A POM-based MOF was synthesized in situ with a carboxyl-functionalized ionic liquid as a bridge to combine the POM and MOF. The resulting [mim(CH2)(3)COO](3)PW@UiO-66 was characterized by XRD, N-2 adsorption-desorption, FT-IR, SEM and TGA. The results indicated that the heteropolyanion-based ionic liquid [mim(CH2)(3)COOH](3)PW was successfully dispersed within the cages of UiO-66. The catalyst [mim (CH2)(3)COO](3)PW@UiO-66, which had a high content of the active component and large specific surface area, exhibited remarkable catalytic performance in oxidative desulfurization (100% DBT removal in 60 min). Importantly, a synergistic catalytic mechanism involving W = O and the Lewis acid, in which the Lewis acid promoted the decomposition of H2O2 and the generation of peroxotungstate (W(O-2)(n)), was proposed to explain the high oxidative desulfurization catalytic efficiency of [mim (CH2)(3)COO](3)PW@UiO-66. (c) 2020 Elsevier Ltd. All rights reserved.
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