Ultrasound-assisted synthesis and catalytic activity of mesostructured FeOx/SBA-15 and FeOx/Zr-SBA-15 catalysts for the oxidative desulfurization of model diesel

Ramos, J.M.; Wang, Jinan; Flores, S.; Chen, L.F.; Nava, N.; Navarrete, Juan T. López; Domínguez, José Manuel; Szpunar, Jerzy A.

doi:10.1016/j.cattod.2018.04.059

Cited by 22 publications

(6 citation statements)

References 46 publications

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“…When the reaction temperature is tuned from 303 K to 323 K, the conversion of DBT is improved from 60.8 % to 99.0 % after a reaction time of 20 min. These results indicate that the increase of reaction temperature is helpful for enhancing the conversion of DBT …”

Section: Resultsmentioning

confidence: 80%

Creation of Active Sites in MOF‐808(Zr) by a Facile Route for Oxidative Desulfurization of Model Diesel Oil

et al. 2020

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MOF‐808(Zr) as an important member of metal‐organic frameworks (MOFs) has attracted much attention due to its good stability, large surface area and rich zirconium metal centers. However, Zr sites in the structure of MOF‐808(Zr) are inactive in many catalytic reactions due to they are well coordinated with organic ligands like 1,3,5‐benzenetricarboxylic acid (BTC) and formate anions. Thus, removing formate anions have been attempted to create more active sites in the structure for many reactions while maintaining the structural stability. In this work, we report that the formate ligands in MOF‐808(Zr) can be facilely removed by the treatment in hot ethanol for 4 h. The obtained material as a heterogeneous catalyst exhibited superior catalytic activity in the oxidative desulfurization (ODS) reaction of dibenzothiophene (DBT) compared with reported MOFs catalysts. The conversion of DBT in model diesel oil could reach >99 % within a reaction time of 20 min at 323 K, which is five times as that over parent MOF‐808(Zr). As a result, the sulfur content was decreased from 1000 ppm to less than 10 ppm. Such catalytic performance should be mainly attributed to the creation of more active sites in the structure of MOF‐808(Zr) after the removal of formate anions.

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Section: Resultsmentioning

confidence: 80%

Creation of Active Sites in MOF‐808(Zr) by a Facile Route for Oxidative Desulfurization of Model Diesel Oil

et al. 2020

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“…The spectra of each sample show signals corresponding to the elements present in its composition. 62 The percentage values of the elements in the samples are listed in Table 2 . Thus, for the sample 1% Ni/SBA-15, the metal was present at 1.0%, while the sample 5% Ni/SBA-15 showed the presence of the metal at 5.2%.…”

Section: Resultsmentioning

confidence: 99%

Catalytic pyrolysis of coconut oil with Ni/SBA-15 for the production of bio jet fuel

et al. 2022

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“…Ultrasound-assisted technology improved the efficacy of iron-based SBA-15 catalysts. For example, Fe-SBA-15 and Fe/Zr-SBA-15 catalysts with high ODS capacity have been prepared from the corresponding mineral supports by an ultrasound-assisted procedure, using Fe(NO 3 ) 3 •9H 2 O as the iron source [144]. Irrespective of experimental conditions, spectroscopic data indicated the presence of a well dispersed hematite phase (in both α-Fe 2 O 3 and γ-Fe 2 O 3 forms) as an active species.…”

Section: Iron Oxidesmentioning

confidence: 99%

SBA-15 Anchored Metal Containing Catalysts in the Oxidative Desulfurization Process

2019

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Recalcitrant sulfur compounds are common impurities in crude oil. During combustion they produce SOx derivatives that are able to affect the atmospheric ozone layer, increasing the formation of acid rains, and reducing the life of the engine due to corrosion. In the last twenty years, many efforts have been devoted to develop conventional hydrodesulfurization (HDS) procedures, as well as alternative methods, such as selective adsorption, bio-desulfurization, oxidative desulfurization (ODS) under extractive conditions (ECODS), and others. Among them, the oxidative procedures have been usually accomplished by the use of toxic stoichiometric oxidants, namely potassium permanganate, sodium bromate and carboxylic and sulfonic peracids. As an alternative, increasing interest is devoted to selective and economical procedures based upon catalytic methods. Heterogeneous catalysis is of relevance in industrial ODS processes, since it reduces the leaching of active species and favors the recovery and reuse of the catalyst for successive transformations. The heterogenization of different types of high-valent metal transition-based organometallic complexes, able to promote the activation of stoichiometric benign oxidants like peroxides, can be achieved using various solid supports. Many successful cases have been frequently associated with the use of mesoporous silicas that have the advantage of easy surface modification by reaction with organosilanes, facilitating the immobilization of homogeneous catalysts. In this manuscript the application of SBA-15 as efficient support for different active metal species, able to promote the catalytic ODS of either model or real fuels is reviewed, highlighting its beneficial properties such as high surface area, narrow pore size distribution and tunable pore diameter dimensions. Related to this topic, the most relevant advances recently published, will be discussed and critically described.

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Ultrasound-assisted synthesis and catalytic activity of mesostructured FeOx/SBA-15 and FeOx/Zr-SBA-15 catalysts for the oxidative desulfurization of model diesel

Cited by 22 publications

References 46 publications

Creation of Active Sites in MOF‐808(Zr) by a Facile Route for Oxidative Desulfurization of Model Diesel Oil

Creation of Active Sites in MOF‐808(Zr) by a Facile Route for Oxidative Desulfurization of Model Diesel Oil

Catalytic pyrolysis of coconut oil with Ni/SBA-15 for the production of bio jet fuel

SBA-15 Anchored Metal Containing Catalysts in the Oxidative Desulfurization Process

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