Mesoporous TiO<sub>2</sub>–SiO<sub>2</sub> adsorbent for ultra-deep desulfurization of organic-S at room temperature and atmospheric pressure

Qin, Bin; Shen, Yuesong; Xu, Boyang; Zhu, Songming; Li, Peiwen; Liu, Youlin

doi:10.1039/c8ra00112j

Cited by 24 publications

(18 citation statements)

References 52 publications

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“…This parameter ranges from 20 to 230 μmol/g, rising in the following order: SiO 2 < ZrO 2 < TiO 2 < Al 2 O 3 . This correlation corroborates with the previously reported acidity data for oxide supports of various natures [30,31].…”

Section: Resultssupporting

confidence: 93%

Effects of Support on the Formation and Activity of Gold Catalysts for Ethanol Conversion to Butanol

et al. 2021

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Using a combination of physicochemical methods, such as TEM, SEM, EDS, XPS, NH 3 -TPD, and N 2 adsorption, the study investigates the structure of a number of supports (Al 2 O 3 , SiO 2 , TiO 2 , ZrO 2 , and C) and of Au/support catalyst samples (Au = 0.5%). The concentration of highly active 2-4 nm gold particles in Au catalysts is infl uenced by the support's texture; this concentration increases in the following order:

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Section: Resultssupporting

confidence: 93%

Effects of Support on the Formation and Activity of Gold Catalysts for Ethanol Conversion to Butanol

et al. 2021

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“…Generally, the sulfur compounds with high electron density around sulfur atom are easily oxidized in ODS reactions . As known, the electron density around sulfur atom in BT, DBT, and 4,6‐DMDBT is 5.739, 5.758 and 5.760, respectively . This means that 4,6‐DMDBT should be easily oxidized when compared with BT and DBT.…”

Section: Resultsmentioning

confidence: 94%

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

et al. 2020

ChemistrySelect

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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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“…The authors showed that ZTS-3 with Si/Ti = 3 exhibited the best photocatalytic desulfurization activity. The DBT conversion rate was found to be 97% in 4 h, and maximum adsorption of DBT over ZTS-3 was 47 mgS per gram of catalyst used and the adsorption rate was much higher than mesoporous TiO 2 –SiO 2 -40 (13.7 mg S/g-cat) [ 81 ]. The photocatalytic activity of ZTS was attributed to the heterojunction formed through the interactions of ZnO with TiO 2 , leading to the expansion of sunlight absorption, enhancing the efficiency of charge separation, and inhibiting electron–hole recombination.…”

Section: Mesoporous Silica and Mesoporous Silica Nanoparticles In mentioning

confidence: 99%

Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

Mendiratta

Ali

2020

Nanomaterials

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Considerable health and climate benefits arising from the use of low-sulfur fuels has propelled the research on desulfurization of fossil fuels. Ideal fuels are urgently needed and are expected to be ultra-low in sulfur (10–15 ppm), with no greater than 50 ppm sulfur content. Although several sulfur removal techniques are available in refineries and petrochemical units, their high operational costs, complex operational needs, low efficiencies, and higher environmental risks render them unviable and challenging to implement. In recent years, mesoporous silica-based materials have emerged as promising desulfurizing agents, owing to their high porosity, high surface area, and easier functionalization compared to conventional materials. In this review, we report on recent progress in the synthesis and chemistry of new functionalized mesoporous silica materials aiming to lower the sulfur content of fuels. Additionally, we discuss the role of special active sites in these sorbent materials and investigate the formulations capable of encapsulating and trapping the sulfur-based molecules, which are challenging to remove due to their complexity, for example the species present in JP-8 jet fuels.

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Mesoporous TiO₂–SiO₂ adsorbent for ultra-deep desulfurization of organic-S at room temperature and atmospheric pressure

Abstract: Ultra-deep desulfurization is a major requirement for upgrading the quality of fuel and power sources for fuel-cells.

Cited by 24 publications

References 52 publications

Effects of Support on the Formation and Activity of Gold Catalysts for Ethanol Conversion to Butanol

Effects of Support on the Formation and Activity of Gold Catalysts for Ethanol Conversion to Butanol

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

Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

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Mesoporous TiO2–SiO2 adsorbent for ultra-deep desulfurization of organic-S at room temperature and atmospheric pressure

Abstract: Ultra-deep desulfurization is a major requirement for upgrading the quality of fuel and power sources for fuel-cells.

Cited by 24 publications

References 52 publications

Effects of Support on the Formation and Activity of Gold Catalysts for Ethanol Conversion to Butanol

Effects of Support on the Formation and Activity of Gold Catalysts for Ethanol Conversion to Butanol

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

Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

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Mesoporous TiO₂–SiO₂ adsorbent for ultra-deep desulfurization of organic-S at room temperature and atmospheric pressure