Catalytic oxidative desulfurization systems based on Keggin phosphotungstate and metal-organic framework MIL-101
authors Ribeiro, S; Barbosa, ADS; Gomes, AC; Pillinger, M; Goncalves, IS; Cunha-Silva, L; Balula, SS
nationality International
journal FUEL PROCESSING TECHNOLOGY
author keywords Oxidative desulfurization; Keggin-type polyoxometalate; Metal-organic framework; MIL-101; Benzothiophene derivatives
keywords IONIC LIQUIDS; GAS OIL; HYDROGEN-PEROXIDE; HETEROGENEOUS CATALYSTS; DEEP DESULFURIZATION; OLEFIN EPOXIDATION; BIPHASE MEDIUM; DIESEL FUEL; POLYOXOMETALATE; H2O2
abstract The tetrabutylammonium salt of phosphotungstic acid, TBA3PW(12)O(40) (PW12), has been encapsulated in the chromium terephthalate metal-organic framework MIL-101. Characterization of the composite PW12@MIL-101 by powder X-ray diffraction, FT-IR, FT-Raman and P-31 magic-angle spinning (MAS) NMR spectroscopies confirmed that the structures of MIL-101 and the polyoxometalate anion were retained after immobilization. Both PW12 and the composite material were examined as catalysts in systems for the oxidative desulfurization CODS) of model oils containing dibenzothiophene (DBT), 1-benzothiophene (1-BT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). The ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate was employed as both extractant and reaction medium. In a one-pot operation carried out at 50 degrees C, the BT derivatives in the model oils were extracted into the IL and then oxidized (using 30% H2O2 as oxidant) to form the corresponding sulfones, resulting in a continuous decrease in the sulfur content in the oil phase. The sulfur removal from the model oil with a sulfur content (for each BT derivative) of 500 ppm reached 100% within 1 h for DBT, 100% within 3 h for 1-BT, and 99% within 4 h for 4,6-DMDBT (sulfur content, 3-7 ppm). The ODS system containing the composite PW12@MIL-101 could be recycled three times with only a slight decrease in the catalytic performance. (C) 2013 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0378-3820
year published 2013
volume 116
beginning page 350
ending page 357
digital object identifier (doi) 10.1016/j.fuproc.2013.07.011
web of science category Chemistry, Applied; Energy & Fuels; Engineering, Chemical
subject category Chemistry; Energy & Fuels; Engineering
unique article identifier WOS:000325844100046
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 3.956
5 year journal impact factor 4.307
category normalized journal impact factor percentile 81.746
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg