Three-dimensional ordered macroporous HPW/titania–alumina catalysts for catalytic oxidative desulfurization of fuels

Three-dimensional ordered macroporous HPW/titania–alumina catalysts for catalytic oxidative... A series of three-dimensionally ordered macroporous (3DOM) alumina doped phosphotungstic acid (HPW)/TiO materi- als was synthesized successfully through sol–gel method with highly ordered 3D polystyrene monoliths as macroporous template. The characterization results of scanning electron microscope and transmission electron microscopy upheld the existence of periodically arranged macroporous structure. The infrared spectroscopy and powder X-ray diffraction results confirmed the homogeneous distribution of Keggin-type HPW on Al O –TiO matrix. Furthermore, the scanning electron 2 3 2 microscopy-energy dispersive X-ray spectrometry, X-ray photoelectron spectroscopy, UV–Vis diffuse reflectance spectros- copy, and inductively coupled plasma spectrometer measurements proved the introduction of alumina element on the TiO framework. NH temperature-programmed desorption (NH -TPD) and pyridine-IR investigation characterized the effects 3 3 of alumina modification on the surface acidity and acidic sites of catalysts. The 3DOM alumina doped HPW/TiO nano- composites were applied in the catalytic oxidation desulfurization process. The alumina doped HPW/TiO catalyst showed superior catalytic oxidation desulfurization performance than corresponding 3DOM HPW/TiO catalyst, mesoporpus alumina doped HPW/TiO , and microporous alumina doped HPW/TiO . 99.7% of benzothiophene (DBT) in the model fuel could 2 2 be removed within 1 h under optimized conditions. This should be attributed to the common influence of 3DOM structure http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Porous Materials Springer Journals

Three-dimensional ordered macroporous HPW/titania–alumina catalysts for catalytic oxidative desulfurization of fuels

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Chemistry; Catalysis; Characterization and Evaluation of Materials; Physical Chemistry
ISSN
1380-2224
eISSN
1573-4854
D.O.I.
10.1007/s10934-018-0627-y
Publisher site
See Article on Publisher Site

Abstract

A series of three-dimensionally ordered macroporous (3DOM) alumina doped phosphotungstic acid (HPW)/TiO materi- als was synthesized successfully through sol–gel method with highly ordered 3D polystyrene monoliths as macroporous template. The characterization results of scanning electron microscope and transmission electron microscopy upheld the existence of periodically arranged macroporous structure. The infrared spectroscopy and powder X-ray diffraction results confirmed the homogeneous distribution of Keggin-type HPW on Al O –TiO matrix. Furthermore, the scanning electron 2 3 2 microscopy-energy dispersive X-ray spectrometry, X-ray photoelectron spectroscopy, UV–Vis diffuse reflectance spectros- copy, and inductively coupled plasma spectrometer measurements proved the introduction of alumina element on the TiO framework. NH temperature-programmed desorption (NH -TPD) and pyridine-IR investigation characterized the effects 3 3 of alumina modification on the surface acidity and acidic sites of catalysts. The 3DOM alumina doped HPW/TiO nano- composites were applied in the catalytic oxidation desulfurization process. The alumina doped HPW/TiO catalyst showed superior catalytic oxidation desulfurization performance than corresponding 3DOM HPW/TiO catalyst, mesoporpus alumina doped HPW/TiO , and microporous alumina doped HPW/TiO . 99.7% of benzothiophene (DBT) in the model fuel could 2 2 be removed within 1 h under optimized conditions. This should be attributed to the common influence of 3DOM structure

Journal

Journal of Porous MaterialsSpringer Journals

Published: Jun 5, 2018

References

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