Adsorption isotherms and kinetics for dibenzothiophene on activated carbon and carbon nanotube doped with nickel oxide nanoparticles
| Autor: | G. A. Oweimreen, Muataz Ali Atieh, Abdalla M. Abulkibash, Mazen K. Nazal, Isam H. Aljundi, Mazen Khaled |
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| Rok vydání: | 2016 |
| Předmět: |
Thermogravimetric analysis
Langmuir Materials science Nickel oxide Inorganic chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Mechanics of Materials Dibenzothiophene medicine Thiophene General Materials Science Freundlich equation 0210 nano-technology Activated carbon medicine.drug |
| Zdroj: | Bulletin of Materials Science. 39:437-450 |
| ISSN: | 0973-7669 0250-4707 |
| DOI: | 10.1007/s12034-016-1151-9 |
| Popis: | Activated carbon (AC) and multiwall carbon nanotubes (CNT) doped with 1, 5 and 10% Ni in the form of nickel oxide nanoparticles were prepared using the wetness impregnation method. These percentages were denoted by the endings NI1, NI5 and NI10 in the notations ACNI1, ACNI5, ACNI10 and CNTNI1, CNTNI5, CNTNIL10, respectively. The physicochemical properties for these adsorbents were characterized using N 2 adsorption–desorption surface area analyzer, thermal gravimetric analysis (TGA), scanning electron microscopy, energy-dispersive X-ray spectroscopy, field-emission transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectrometre. Adsorption isotherms were obtained and desulphurization kinetics were carried out on solutions of dibenzothiophene (DBT) and thiophene in a model fuel. The efficiencies of DBT and thiophene removal were reported. The adsorption isotherms fitted the Langmuir and Freundlich models. The highest adsorption capacity for DBT was 74± 5 mg g−1 on ACNI5; the maximum adsorption capacities of the other adsorbents followed the trend ACNI1 > ACNI10 > AC > CNTNI5 > CNTNI1 > CNTNI10 > CNT. The adsorption rates for DBT and thiophene followed pseudo-second-order kinetics. The selective removal by these adsorbents of DBT relative to thiophene and naphthalene was evaluated. The adsorbents’ reusability and the effect of the percentage of aromatic compounds on their adsorption capacity were also reported. |
| Databáze: | OpenAIRE |
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