Desulfurization of model diesel by extraction/oxidation using a zinc-substituted polyoxometalate as catalyst under homogeneous and heterogeneous (MIL-101(Cr) encapsulated) conditions

Julião, Diana; Gomes, Ana C.; Pillinger, Martyn; Cunha-Silva, Luı́s; Castro, Balt­azar de; Gonçalves, Isabel S.; Balula, Salete S.

doi:10.1016/j.fuproc.2014.10.030

Cited by 126 publications

(74 citation statements)

References 67 publications

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“…The tungsten 4f XP spectrum of PTA@Fe3O4/EN-MIL-101 (Fig. 5d) °C [44,63] and that between 200-300 °C from the smaller mesoporous cage [54,55] Higher temperature loss is attributed to collapse of the MIL-101 framework between 300-500 °C due to composition of the dicarboxylate linkers and OH elimination [15,44]. MIL-101(Cr) thus …”

Section: Synthesis Of Pta@fe3o4/en-mil-101mentioning

confidence: 99%

A magnetically-separable H 3 PW 12 O 40 @Fe 3 O 4 /EN-MIL-101 catalyst for the one-pot solventless synthesis of 2H-indazolo[2,1- b ] phthalazine-triones

Hashemzadeh

Amini

Tayebee

et al. 2017

Molecular Catalysis

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A magnetic inorganic-organic catalyst, PTA@Fe3O4/EN-MIL-101 (EN=ethylenediamine, PTA=phosphotungstic acid) was fabricated and characterized by XRD, HRTEM, FESEM, UVVis, TGA-DTA, FT-IR, XPS and porosimetry. PTA retained the parent Keggin structure upon dispersion throughout the amine-functionalized chromium terephthalate metal-organic framework, over which magnetic Fe3O4 nanoparticles were previously introduced. The resulting composite heterogeneous solid acid was an active catalyst for the one-pot synthesis of diverse 2H-indazolo[2,1-b] phthalazine-triones in goodexcellent yields under mild, solventless condition, and offers facile separation and excellent recyclability.

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Section: Synthesis Of Pta@fe3o4/en-mil-101mentioning

confidence: 99%

A magnetically-separable H 3 PW 12 O 40 @Fe 3 O 4 /EN-MIL-101 catalyst for the one-pot solventless synthesis of 2H-indazolo[2,1- b ] phthalazine-triones

Hashemzadeh

Amini

Tayebee

et al. 2017

Molecular Catalysis

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“…The results show that the immobilization of the POM in both solid supports has led to an enhancement of the catalytic activity as previously observed for other POM/MOFs catalytic systems in ODS processes. 18,22 The individual desulfurization percentage for each compound using the heterogeneous catalysts after the initial extraction stage (10 min) and 2 h of reaction is represented in Fig. 5.…”

Section: Oxidative Desulfurization (Ods) Processesmentioning

confidence: 99%

“…10,[15][16][17] Our research group has been designing novel heterogeneous catalysts for ODS applications through the incorporation/immobilization of catalytically active POMs in solid supports. [18][19][20][21][22] The three-dimensional structure, chemical robustness and accessible porosity of metal-organic frameworks (MOFs) make them suitable candidates to act as solid supports in the heterogenization process. 23 …”

Section: Introductionmentioning

confidence: 99%

Influence of a porous MOF support on the catalytic performance of Eu-polyoxometalate based materials: desulfurization of a model diesel

Granadeiro

Nogueira

Julião

et al. 2016

Catal. Sci. Technol.

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An aluminum 2-aminoterephthalate based metal-organic framework (MOF) material was applied for the first time to prepare highly efficient heterogeneous catalysts in desulfurization processes. Sandwich-type [Eu(PW11O39)2] 11polyoxometalate (POM) was supported on Al(III) and Cr(III) MIL-type MOFs, NH2-MIL-53(Al) and MIL-101(Cr), and extensive characterization confirmed the incorporation of the POM on the two supports. The catalytic performance of the two composite materials, POM/MIL(Al) and POM/MIL(Cr), was evaluated in the oxidative desulfurization (ODS) of a model oil containing some of the most common refractory sulfur compounds in diesel. Both composite materials have shown to be active and robust heterogeneous catalysts for the efficient removal of sulfur-containing compounds from model diesel, and the influence of the solid support on the catalytic performance of the active species was further assessed. The POM/MIL(Al) revealed notable catalytic performance, since complete desulfurization was obtained after 2 h of reaction. Furthermore, this remarkable heterogeneous catalyst revealed to be stable and recyclable for various catalytic cycles.

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“…In this work, we intended to investigate different methodologies to encapsulate Keggin‐type anions into an MIL‐101 framework in an effort to improve on previous results for POMs@MIL‐101 catalysts for oxidative desulfurization processes . Therefore, we turned our attention to the immobilization of an active PW 11 Zn POM in an amine‐functionalized MOF, NH 2 ‐MIL‐101(Al), through either the direct synthesis approach or postsynthesis impregnation.…”

Section: Introductionmentioning

confidence: 99%

Zinc‐Substituted Polyoxotungstate@amino‐MIL‐101(Al) – An Efficient Catalyst for the Sustainable Desulfurization of Model and Real Diesels

et al. 2016

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The zinc‐substituted polyoxotungstate [PW11Zn(H2O)O39]5– (PW11Zn) has been encapsulated within the aluminium(III) 2‐aminoterephthalate NH2‐MIL‐101(Al) metal–organic framework (MOF) either directly through a one‐pot microwave‐assisted synthesis or by an impregnation method. The resultant composite materials were characterized by elemental analysis, powder X‐ray diffraction, FTIR spectroscopy, and 31P magic‐angle spinning (MAS) NMR spectroscopy. The desulfurization of a model diesel containing three refractory organosulfur compounds (1‐benzothiophene, dibenzothiophene, and 4,6‐dimethyldibenzothiophene) was studied with the ionic liquid 1‐butyl‐3‐methylimidazolium hexafluorophosphate as an extractant, the PW11Zn@MOF composites as sulfoxidation catalysts, and aqueous H2O2 as an oxidant. The composite obtained by direct synthesis was the most efficient catalyst and led to almost complete desulfurization of the model diesel under mild conditions. Moreover, the solid catalyst could be recovered readily and recycled without significant loss of desulfurization performance. The application of this system to the treatment of a real diesel sample provided a very good sulfur removal of 83 % when combined with liquid–liquid extraction.

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Desulfurization of model diesel by extraction/oxidation using a zinc-substituted polyoxometalate as catalyst under homogeneous and heterogeneous (MIL-101(Cr) encapsulated) conditions

Cited by 126 publications

References 67 publications

A magnetically-separable H 3 PW 12 O 40 @Fe 3 O 4 /EN-MIL-101 catalyst for the one-pot solventless synthesis of 2H-indazolo[2,1- b ] phthalazine-triones

A magnetically-separable H 3 PW 12 O 40 @Fe 3 O 4 /EN-MIL-101 catalyst for the one-pot solventless synthesis of 2H-indazolo[2,1- b ] phthalazine-triones

Influence of a porous MOF support on the catalytic performance of Eu-polyoxometalate based materials: desulfurization of a model diesel

Zinc‐Substituted Polyoxotungstate@amino‐MIL‐101(Al) – An Efficient Catalyst for the Sustainable Desulfurization of Model and Real Diesels

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