Isam H. Aljundi
King Fahd University of Petroleum and Minerals
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Featured researches published by Isam H. Aljundi.
Bulletin of Materials Science | 2016
Mazen Khaled Nazal; G. A. Oweimreen; Mazen Khaled; Muataz Ali Atieh; Isam H. Aljundi; Abdalla M. Abulkibash
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.
Environmental Technology | 2017
Mazen Khaled Nazal; Mazen Khaled; Isam H. Aljundi; Muataz Ali Atieh; G. A. Oweimreen; Abdalla M. Abulkibash
ABSTRACT Carbon nanotube (CNT) and graphene oxide (GO) as common nanostructures were modified with silver sulfide (Ag2S) using chemical vapor deposition. The raw and modified materials were tested for the removal of Dibenzothiophene (DBT) from a model fuel in batch mode adsorption experiments. The maximum adsorption capacities of DBT were 52.18 and 49.65 mg g−1, using CNT-Ag2S and GO-Ag2S, respectively. The adsorption isotherm was modeled using Freundlich, Langmuir and Temkin models using linear and non-linear regression. The squared correlation coefficient (R2) and HYBRID error function were used to determine the best adsorption model. IR spectroscopy was used to study the DBT adsorption mechanism, and it was found that the DBT molecules lie flat on the surface of the developed adsorbents. Significant improvement was achieved in the adsorption of DBT using CNT-Ag2S and GO-Ag2S, where the maximum adsorption capacity increased by 127% and 117% respectively, which indicates a stronger interaction between DBT and the modified adsorbents.
Korean Journal of Chemical Engineering | 2018
Abdelrahman Awad; Isam H. Aljundi
A facilitated transport polyamide (PA) membrane was developed for gas separation by interfacial polymerization reaction of piperazine (PIP) and isophthaloyl chloride (IPC) supported on polysulfone (PSF) membrane previously prepared by dry/wet phase inversion method. The properties of the prepared membranes were characterized by SEM, FT-IR, TGA, and XRD. SEM images showed that a defect-free PSF, and rough PA membranes were fabricated, while the FT-IR spectra confirmed the formation of PA layer on top of the PSF support. The separation performance of the thin film PA and PSF membranes was evaluated using four gasses (CO2, CH4, N2, and O2). Compared to the PSF membrane, the PA membrane demonstrated an increased selectivity of CO2/CH4 and CO2/N2 by 178%, 169%, respectively. This improvement was attributed to the presence of amine functional groups, which acted as a fixed carrier to facilitate the transport of CO2 gas across the membrane. However, building the PA layer on top of PSF support reduced the membrane permeance of CO2 from 2.41 to 2.12 GPU as a result of the increased mass transfer resistance. Furthermore, the effect of operating temperature and pressure on the separation performance of the membranes was investigated.
Journal of water process engineering | 2016
J. Saqib; Isam H. Aljundi
Arabian Journal of Chemistry | 2015
Mazen Khaled Nazal; Mazen Khaled; Muataz Ali Atieh; Isam H. Aljundi; G. A. Oweimreen; Abdalla M. Abulkibash
Desalination | 2017
Isam H. Aljundi
Desalination | 2017
Anwar Ul Haq Khan; Zafarullah Khan; Isam H. Aljundi
Energy | 2018
Abdelrahman Awad; Isam H. Aljundi
Energy & Fuels | 2017
Shan He; Juan Lucio-Vega; Linzhou Zhang; Quan Shi; Scott R. Horton; S. Al-Khattaf; Isam H. Aljundi; Omer Elmutasim; Suoqi Zhao; Michael T. Klein
Journal of Natural Gas Science and Engineering | 2018
Musa O. Najimu; Isam H. Aljundi