Roles of surface chemistry and structural defects of activated carbons in the oxidative desulfurization of benzothiophenes

Timko, Michaël T.; Wang, Jinan; Burgess, John W.; Kracke, Peter; Gonzalez, Lino; Jaye, Cherno; Fischer, Daniel A.

doi:10.1016/j.fuel.2015.09.075

Cited by 63 publications

(33 citation statements)

References 91 publications

(154 reference statements)

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“…In refs. [33][34][35][36], supported catalysts based on activated carbon were studied in the liquid-phase oxidation of sulfur; it was shown that percarboxylic acid groups, which are formed in the reaction on defects of basal planes of the carbon lattice, accelerate the reaction [37]. A study of oxidized graphene and CNTs revealed the effect of the surface chemical composition and graphitization degree on the catalytic activity of carbon material in the oxidation of dibenzothiophene [38].…”

Section: Introductionmentioning

confidence: 99%

Effect of Acid Treatment on the Functionalization of Surface, Structural and Textural Properties of Carbon Nanotubes Taunit

Ismagilov

Yashnik

Shikina

et al. 2019

Eurasian Chem. Tech. J.

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The role of acid treatment of Taunit carbon nanotubes in the formation of oxygen-containing functional groups on its surface as well as morphological and textural properties was studied. Acid treatment was carried out in an HNO3 solution or its mixture with H2SO4 under mild conditions (85 °C/1 h) with subsequent washing with distilled water or without washing. Properties of the initial and oxidized samples were investigated using elemental carbon, hydrogen, nitrogen, oxygen (CHNO) analysis, BET (Brunauer-Emmett-Teller) determination of surface area, X-ray diffraction, Raman and Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy, and hydrogen temperature-programmed reduction. Treatment with HNO3 and HNO3/H2SO4 mixture was shown to be efficient for the formation of various oxygen-containing groups on the Taunit surface; therewith, the water washing step also contributed to functionalization of the surface. Depending on the oxidant, acid treatment increased graphite and oxygen content in the samples by a factor of 3‒4.5. Treatment with HNO3 without water washing exerted a weak effect on the graphite structure ordering, the concentration of aliphatic groups was high as compared to other oxidation conditions. Treatment of Taunit with the HNO3/H2SO4 mixture, on the contrary, increased the number of defects in graphite layers and decreased the concentration of aliphatic structures.

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Section: Introductionmentioning

confidence: 99%

Effect of Acid Treatment on the Functionalization of Surface, Structural and Textural Properties of Carbon Nanotubes Taunit

Ismagilov

Yashnik

Shikina

et al. 2019

Eurasian Chem. Tech. J.

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“…Several studies have been conducted in this area as a result; a variety of adsorbents have been studied to date, including activated carbon, activated alumina, metal‐organic frameworks (MOFs), and ionic liquids . Identifying an adsorbent that can adsorb nitrogen or sulphur compounds but not aromatic compounds is therefore a challenge …”

Section: Introductionmentioning

confidence: 99%

Y zeolite equilibrium catalyst waste from fluidized catalytic cracking regenerated by electrokinetic treatment: An adsorbent for sulphur and nitrogen compounds

et al. 2018

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The adsorption of sulphur, nitrogen, and aromatic compounds on a regenerated equilibrium catalyst (ecat-R) was studied using model and real diesel fuels. The ecat-R was obtained by electrokinetic treatment of an equilibrium catalyst (Y zeolites) waste from fluidized catalytic cracking (FCC) units. The studied model diesel fuel contained dibenzothiophene (1039 mg/L), quinoline (600 mg/L), and naphthalene (600 mg/L), as models for sulphur, nitrogen, and aromatic compounds, respectively, in n-decane as solvent. The ecat-R was characterized using X-ray diffraction, X-ray fluorescence, N 2 adsorption-desorption, thermogravimetric and differential thermal analysis, scanning electron microscopy, Fourier-transform infrared spectroscopy, and granulometry. The adsorption experiments were performed at 40 8C and 150 rpm. The results of the isotherm and kinetics studies were favourable; the material showed a high adsorption capacity for dibenzothiophene (2.8 mg S/g) and quinoline (6.3 mg N/g). The isotherm for naphthalene was less favourable (2 mg NAP/g). The process rapidly reached equilibrium in approximately 2 h. For real diesel fuel, the adsorption removal was 26 % for sulphur and 36 % for nitrogen.

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“…Activated carbons (ACs) are common and efficient adsorbents for removing many types of pollutants from different matrices . The high adsorptive capacity of activated carbons is mainly attributed to the high density of surface functional groups, its well‐developed porous structure, and its large specific surface area . Accordingly, ACs show high adsorption for both OSCs and other non‐S compounds, and this can affect the quality of the final product in some cases .…”

Section: Adsorptive Desulfurization: the Upcoming Desulfurization Tementioning

confidence: 99%

“…[12] Thehigh adsorptive capacity of activated carbons is mainly attributed to the high density of surface functional groups,i ts well-developed porous structure,a nd its large specific surface area. [12,81] Accordingly,A Cs show high adsorption for both OSCs and other non-S compounds,a nd this can affect the quality of the final product in some cases. [12,82] Therefore,s urface modification of ACst oi mprover emoval of OSCs is ah ot research area.…”

Section: Carbon-based Adsorbents and Modified Formsmentioning

confidence: 99%

Conventional and Upcoming Sulfur‐Cleaning Technologies for Petroleum Fuel: A Review

et al. 2016

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Environmental regulations on the quality of liquid fuels continue to create more requirements to produce a near‐to‐zero sulfur content. The hydrodesulfurization process has a high running cost and suffers from incomplete removal of sulfur compounds, particularly alkylated dibenzothiophene. Recently, oxidative and adsorption desulfurization procedures showed high potential to take part in commercial desulfurization. The advantages and disadvantage of the newly proposed procedures are outlined and reviewed. Undoubtedly, adsorptive‐based methods have achieved many advances in this area. Particularly, surface imprinted polymers and metal–organic frameworks have manifested an excellent tendency to remove bulky sulfur compounds with minimum experimental effort. This review presents information about the workability, efficiency, and mechanisms of the current desulfurization methodologies for diesel as a common transportation fuel. More attention is given to adsorptive desulfurization as a promising technology.

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Roles of surface chemistry and structural defects of activated carbons in the oxidative desulfurization of benzothiophenes

Cited by 63 publications

References 91 publications

Effect of Acid Treatment on the Functionalization of Surface, Structural and Textural Properties of Carbon Nanotubes Taunit

Effect of Acid Treatment on the Functionalization of Surface, Structural and Textural Properties of Carbon Nanotubes Taunit

Y zeolite equilibrium catalyst waste from fluidized catalytic cracking regenerated by electrokinetic treatment: An adsorbent for sulphur and nitrogen compounds

Conventional and Upcoming Sulfur‐Cleaning Technologies for Petroleum Fuel: A Review

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