Oxidation by H2O2 of bezothiophene and dibenzothiophene over different polyoxometalate catalysts in the frame of ultrasound and mixing assisted oxidative desulfurization

Choi, Angelo Earvin Sy; Roces, Susan A.; Dugos, Nathaniel P.; Wan, Meng-Wei

doi:10.1016/j.fuel.2016.04.014

Cited by 102 publications

(47 citation statements)

References 48 publications

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“…The E a is another important parameter to evaluate a catalyst . The E a value of the W 2 N/pDC catalyst (calculated from the Arrhenius plot, see Figure S5b, Supporting Information) for the DBT oxidation is 38.2 KJ mol −1 , which is relatively low and competitive to the numerous reported ODS catalysts composed of W …”

Section: Resultsmentioning

confidence: 91%

Tungsten Nitride, Well‐Dispersed on Porous Carbon: Remarkable Catalyst, Produced without Addition of Ammonia, for the Oxidative Desulfurization of Liquid Fuel

Khan

Bhadra

Park

et al. 2019

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Polyanilines (pANIs), loaded with phosphotungstic acid (PTA), are pyrolyzed to get WO3 or W2N (≈6 and ≈7 nm, respectively), which is well‐dispersed on pANI‐derived porous carbons (pDCs). Depending on the pyrolysis temperature, WO3/pDC, W2N/pDC, or W2N‐W/pDCs could be obtained selectively. pANI acts as both the precursor of pDC and the nitrogen source for the nitridation of WO3 into W2N during the pyrolysis. Importantly, W2N could be obtained from the pyrolysis without ammonia feeding. The obtained W2N/pDC is applied as a heterogeneous catalyst for the oxidative desulfurization (ODS) of liquid fuel for the first time, and the results are compared with WO3/pDC and WO3/ZrO2. The W2N/pDC is very efficient in ODS with remarkable performance compared with WO3/pDC or WO3/ZrO2, which is applied as a representative ODS catalyst. For example, W2N/pDC shows around 3.4 and 2.7 times of kinetic constant and turnover frequency (based on 5 min of reaction), respectively, compared to that of WO3/ZrO2. Moreover, the catalysts could be regenerated in a facile way. Therefore, W2N/pDC could be produced facilely from pyrolysis (without ammonia feeding) of PTA/pANI, and W2N, well‐dispersed on pDC, can be suggested as a very efficient oxidation catalyst for the desulfurization of liquid fuel.

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Section: Resultsmentioning

confidence: 91%

Tungsten Nitride, Well‐Dispersed on Porous Carbon: Remarkable Catalyst, Produced without Addition of Ammonia, for the Oxidative Desulfurization of Liquid Fuel

Khan

Bhadra

Park

et al. 2019

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“…In the UADO process, the reaction kinetics is better due to increased mass transfer in the heterogeneous reaction system. The reaction rate and mass transfer are also enhanced because of the simultaneous physical and mechanical effects [57][58][59].…”

Section: Ultrasound-assisted Oxidation Systemmentioning

confidence: 99%

A Comprehensive Review on Catalytic Oxidative Desulfurization of Liquid Fuel Oil

2019

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The production of green fuel oil is of the utmost importance for maintaining a healthy life and environment in the current world. Effective and complete removal of sulfur refractory compounds (such as 4,6-dimethyldibenzothiophene and other alkyl-substituted thiophene derivatives) from fuel oil is essential to meet the new requirements of sulfur standards. Several techniques have been proposed for desulfurization of fuel oil, such as hydrodesulfurization (HDS), selective adsorption, extractive distillation, biodesulfurization, and oxidative desulfurization (ODS). The removal of sulfur by the HDS process requires higher investment costs, high reaction temperature (up to 400 °C), and high pressure (up to 100 atm) reactors. On the other hand, studies have shown that the ODS process is remarkably successful in the removal of sulfur under mild reaction conditions. This review article presents a comparative analysis of various existing catalytic oxidation techniques: acetic acid/formic acid catalytic oxidation, heteropolyacid (HPA) catalytic oxidation, ionic liquid catalytic oxidation, molecular sieve catalytic oxidation, polyoxometalates catalytic oxidation, titanium catalytic oxidation, and ultrasound-assisted oxidation systems, as well as discusses research gaps, and proposes important recommendations for future challenges.

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“…Thus, in the past few decades, because of the increasingly serious environmental issues, regulations on sulfur compounds have turned to be more and more stringent [6] . Currently, the sulfur content in transport oil is limited to be no more than 10 ppm [7,8] , and the value in fuel cell is more stringent, which is required to be lower than 60 ppb [9] . Industrially, the sulfur compounds in fuel oils are generally removed by hydrodesulfurization (HDS), which is realized at high reaction temperature and operating pressure [10] , and hydrogen is always required in HDS process [11] .…”

Section: Introductionmentioning

confidence: 99%

3D-printing of integrated spheres as a superior support of phosphotungstic acid for deep oxidative desulfurization of fuel

Zhu

Chen

et al. 2020

Journal of Energy Chemistry

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Oxidation by H2O2 of bezothiophene and dibenzothiophene over different polyoxometalate catalysts in the frame of ultrasound and mixing assisted oxidative desulfurization

Cited by 102 publications

References 48 publications

Tungsten Nitride, Well‐Dispersed on Porous Carbon: Remarkable Catalyst, Produced without Addition of Ammonia, for the Oxidative Desulfurization of Liquid Fuel

Tungsten Nitride, Well‐Dispersed on Porous Carbon: Remarkable Catalyst, Produced without Addition of Ammonia, for the Oxidative Desulfurization of Liquid Fuel

A Comprehensive Review on Catalytic Oxidative Desulfurization of Liquid Fuel Oil

3D-printing of integrated spheres as a superior support of phosphotungstic acid for deep oxidative desulfurization of fuel

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