The nature and kinetics of the adsorption of dibenzothiophene in model diesel fuel on carbonaceous materials loaded with aluminum oxide particles

Mazen K. Nazal, Mazen Khaled, Muataz Atieh, Isam H. Aljundi, Ghassan A. Oweimreen, Abdalla M. Abulkibash

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The resulted environmental and industrial problems from presence of sulfur compounds such as dibenzothiophene (DBT) in some fuel led to attract greater interest in research on the removal of these compounds. In this study the adsorption isotherms of dibenzothiophene (DBT) in model diesel fuel were obtained and desulfurization kinetics was carried out. The adsorbents used were commercial coconut activated carbon (AC), multiwall carbon nanotubes (CNT) and synthesized graphene oxide (GO) loaded with 5% and 10.9% aluminum (Al) in the form of aluminum oxide (Al2O3) particles to improve the chemical properties of their surface. The physicochemical properties for these adsorbents were characterized using thermal gravimetric analysis (TGA), N2 adsorption-desorption surface area analyzer, scanning electron microscope (SEM), energetic dispersive X-ray diffractogram (EDX), field emission electron microscope (FE-TEM) and X-ray photoelectron spectrometer (XPS). The adsorption capacities for DBT on the aluminum oxide modified adsorbents are improved by about twofold, which is attributable to introduction of Al2O3 Lewis acid as an additional adsorption site. The highest adsorption capacity for DBT (85±1mg/g) with high selectivity factor relative to naphthalene (54mg/g) was achieved using loaded activated carbon with 5% Al. The adsorption capacities, removal selectivity and efficiencies with which the other prepared adsorbents remove DBT from model fuel are reported. The adsorption isotherms fitted both the Langmuir and Freundlich models. The adsorption rate for DBT follows pseudo-second order kinetics with correlation coefficients close to 1.00. The adsorbents are stable and reusable for at least 5 times.

Original languageEnglish
JournalArabian Journal of Chemistry
DOIs
Publication statusAccepted/In press - 1 Sep 2015

Fingerprint

Aluminum Oxide
Diesel fuels
Adsorbents
Aluminum
Adsorption
Kinetics
Oxides
Adsorption isotherms
Activated carbon
Electron microscopes
Field emission microscopes
Sulfur Compounds
X rays
Lewis Acids
Carbon Nanotubes
Sulfur compounds
Graphite
Gravimetric analysis
Naphthalene
Desulfurization

Keywords

  • Adsorption isotherms
  • Adsorptive desulfurization
  • Model fuel
  • Selectivity
  • Thiophenic compounds

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

The nature and kinetics of the adsorption of dibenzothiophene in model diesel fuel on carbonaceous materials loaded with aluminum oxide particles. / Nazal, Mazen K.; Khaled, Mazen; Atieh, Muataz; Aljundi, Isam H.; Oweimreen, Ghassan A.; Abulkibash, Abdalla M.

In: Arabian Journal of Chemistry, 01.09.2015.

Research output: Contribution to journalArticle

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abstract = "The resulted environmental and industrial problems from presence of sulfur compounds such as dibenzothiophene (DBT) in some fuel led to attract greater interest in research on the removal of these compounds. In this study the adsorption isotherms of dibenzothiophene (DBT) in model diesel fuel were obtained and desulfurization kinetics was carried out. The adsorbents used were commercial coconut activated carbon (AC), multiwall carbon nanotubes (CNT) and synthesized graphene oxide (GO) loaded with 5{\%} and 10.9{\%} aluminum (Al) in the form of aluminum oxide (Al2O3) particles to improve the chemical properties of their surface. The physicochemical properties for these adsorbents were characterized using thermal gravimetric analysis (TGA), N2 adsorption-desorption surface area analyzer, scanning electron microscope (SEM), energetic dispersive X-ray diffractogram (EDX), field emission electron microscope (FE-TEM) and X-ray photoelectron spectrometer (XPS). The adsorption capacities for DBT on the aluminum oxide modified adsorbents are improved by about twofold, which is attributable to introduction of Al2O3 Lewis acid as an additional adsorption site. The highest adsorption capacity for DBT (85±1mg/g) with high selectivity factor relative to naphthalene (54mg/g) was achieved using loaded activated carbon with 5{\%} Al. The adsorption capacities, removal selectivity and efficiencies with which the other prepared adsorbents remove DBT from model fuel are reported. The adsorption isotherms fitted both the Langmuir and Freundlich models. The adsorption rate for DBT follows pseudo-second order kinetics with correlation coefficients close to 1.00. The adsorbents are stable and reusable for at least 5 times.",
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