asir alnaama - Academia.edu (original) (raw)

Papers by asir alnaama

Research paper thumbnail of Reactive Adsorption Desulfurization by Nanocrystalline ZnO / Zeolite A Molecular Sieves

Nanocrystalline ZnO/Zeolite type A composite was prepared by simple method of operation by the pr... more Nanocrystalline ZnO/Zeolite type A composite was prepared by simple method of operation by the precipitation of zinc oxide and loading on zeolite 5A in one step. Characterization was made by X-ray diffraction (XRD), X-ray fluorescence(XRF), N2 adsorptiondesorption for BET surface area, and Atomic force microscopy (AFM). Results showed that zinc oxide was loaded on zeolite as noticed by the characteristic peaks and was of nano scale having an average diameter of 88.57nm. The percentage loading of ZnO on zeolite A was 28.37% and the surface area was 222m 2 /g. The activity of the prepared catalyst was examined in the desulfurization of double hydrogenated diesel fuel. The process was investigated in a controlled autoclave with temperature range studied 100220 o C. Results indicated an oxidation of thiophenic compounds on the surface of the catalyst coupled with adsorption. About 35% reduction was obtained and the capacity was 10.56 mg S/g catalyst.

Research paper thumbnail of Synthesis and Characterization of Nano-crystalline ZSM-5 Zeolite

˜Al-œKhawarizmi engineering journal, 2015

Nano-crystalline ZSM-5 zeolite was synthesized by hydrothermal method using chelating agent and t... more Nano-crystalline ZSM-5 zeolite was synthesized by hydrothermal method using chelating agent and two gel compositions:Compositionɪ:Al2O3:86SiO2:5.5TPA:12.7Na2O:3.4Trien:3320H2O.Compositionɪɪ:Al2O3:68SiO2:5.4TPA:10Na2O:2.6Trien:2626H2O.Study of hydrothermal reaction factors on characteristics of nano- sized zsm-5 has been carried on ,among them are crystallization temperature, crystallization time and concentration of template ( TPAOH ) solution. Synthesis was accomplished in PTFE lined autoclave ( reactor ) . The product were characterized by X-ray diffraction ( XRD ),Atomic force microscopy ( AFM ),scanning electron microscopy, Fourier transform infrared ( FTIR ) and Brunauer-Emmet-Teller (N2 absorption-desorption isotherm).SEM and XRD results indicate that crystallinity of synthesized zeolite increase with increasing crystallization time and temperature. AFM results indicate that a nano-sized level of about 50nm was reached for "particle average diameter". FTIR results sh...

Research paper thumbnail of Synthesis and Characterization of Nanocrystalline Alumino-phosphate AlPO 4-11 Molecular Sieves

Aluminophosphates molecular sieves (AlPO4-11) were synthesized by hydrothermal reaction method. T... more Aluminophosphates molecular sieves (AlPO4-11) were synthesized by hydrothermal reaction method. The syntheses were carried out using sealed stainless autoclave. Investigations of the effect of crystallization temperature, ratio of template to phosphoric pentoxide (R/P2O5), pH adjustment of gel solution and other parameters were studied. Characterization of products were carried out using powder X-ray diffraction (XRD), atomic force spectroscopy (AFM), Fourier transform infrared (FTIR), N2 adsorption-desorption BET surface, thermogravemetry (TGA) and scanning electron spectroscopy (SEM). The XRD patterns revealed that the AEL structure is obtained with high crystallinity for AlPO4-11 at crystallization temperature 190 o C. Type of template (R) and ratio of (R/P2O5) showed a great influence on XRD patterns and nano-level of particle size and optimum ratio of 1.1 was established for (R/P2O5) for AlPO4-11. AFM results showed that a nano-level has been got of 95 nm. Mapo-11 synthesized w...

Research paper thumbnail of Synthesis and Characterization of Nano

Nano-crystalline ZSM5 zeolite was synthesized by hydrothermal method us ing chelating agent and t... more Nano-crystalline ZSM5 zeolite was synthesized by hydrothermal method us ing chelating agent and two gel compositions:Composition ɪ:Al 2O3:86SiO 10Na2O:2.6Trien:2626H2O.Study of hydrothermal reaction factors on charact eristics of nano carried on ,among them are crystallization temperat ure, crystallization time and concentrati solution. Synthesis was accomplished in PTFE lined autoclave ( reactor ) . The product were characteri zed by X diffraction ( XRD ),Atomic force microscopy ( AFM ) ,scanning electron microscopy, Fourier transform in frared ( FTIR ) and Brunauer-Emmet-Teller (N 2 absorption synthesized zeolite increase with increasing crysta llization time and temperature. AFM results indicat e that a nano level of about 50nm was reached for "particle average diameter". "1080,800,550,450 cm -1" have been clearly obtained, (TPAOH) solution concentration on crystallinity and

Research paper thumbnail of Removal of 4-nitro-phenol from wastewater using synthetic zeolite and kaolin clay

Korean Journal of Chemical Engineering, 2013

Adsorption techniques are widely used to remove certain classes of pollutants from wastewater. Ph... more Adsorption techniques are widely used to remove certain classes of pollutants from wastewater. Phenolic compounds represent one of the problematic groups. Na-Y zeolite has been synthesized from locally available Iraqi kaolin clay. Characterization of the prepared zeolite was made by XRD and surface area measurement using N 2 adsorption. Both synthetic Na-Y zeolite and kaolin clay have been tested for adsorption of 4-Nitro-phenol in batch mode experiments. Maximum removal efficiencies of 90% and 80% were obtained using the prepared zeolite and kaolin clay, respectively. Kinetics and equilibrium adsorption isotherms were investigated. Investigations showed that both Langmuir and Freundlich isotherms fit the experimental data quite well. On the other hand, the adsorption of phenol was found to obey first-order kinetics.

Research paper thumbnail of Reactive Adsorption Desulfurization by Nanocrystalline ZnO / Zeolite A Molecular Sieves

Nanocrystalline ZnO/Zeolite type A composite was prepared by simple method of operation by the pr... more Nanocrystalline ZnO/Zeolite type A composite was prepared by simple method of operation by the precipitation of zinc oxide and loading on zeolite 5A in one step. Characterization was made by X-ray diffraction (XRD), X-ray fluorescence(XRF), N2 adsorptiondesorption for BET surface area, and Atomic force microscopy (AFM). Results showed that zinc oxide was loaded on zeolite as noticed by the characteristic peaks and was of nano scale having an average diameter of 88.57nm. The percentage loading of ZnO on zeolite A was 28.37% and the surface area was 222m 2 /g. The activity of the prepared catalyst was examined in the desulfurization of double hydrogenated diesel fuel. The process was investigated in a controlled autoclave with temperature range studied 100220 o C. Results indicated an oxidation of thiophenic compounds on the surface of the catalyst coupled with adsorption. About 35% reduction was obtained and the capacity was 10.56 mg S/g catalyst.

Research paper thumbnail of Synthesis and Characterization of Nano-crystalline ZSM-5 Zeolite

˜Al-œKhawarizmi engineering journal, 2015

Nano-crystalline ZSM-5 zeolite was synthesized by hydrothermal method using chelating agent and t... more Nano-crystalline ZSM-5 zeolite was synthesized by hydrothermal method using chelating agent and two gel compositions:Compositionɪ:Al2O3:86SiO2:5.5TPA:12.7Na2O:3.4Trien:3320H2O.Compositionɪɪ:Al2O3:68SiO2:5.4TPA:10Na2O:2.6Trien:2626H2O.Study of hydrothermal reaction factors on characteristics of nano- sized zsm-5 has been carried on ,among them are crystallization temperature, crystallization time and concentration of template ( TPAOH ) solution. Synthesis was accomplished in PTFE lined autoclave ( reactor ) . The product were characterized by X-ray diffraction ( XRD ),Atomic force microscopy ( AFM ),scanning electron microscopy, Fourier transform infrared ( FTIR ) and Brunauer-Emmet-Teller (N2 absorption-desorption isotherm).SEM and XRD results indicate that crystallinity of synthesized zeolite increase with increasing crystallization time and temperature. AFM results indicate that a nano-sized level of about 50nm was reached for "particle average diameter". FTIR results sh...

Research paper thumbnail of Synthesis and Characterization of Nanocrystalline Alumino-phosphate AlPO 4-11 Molecular Sieves

Aluminophosphates molecular sieves (AlPO4-11) were synthesized by hydrothermal reaction method. T... more Aluminophosphates molecular sieves (AlPO4-11) were synthesized by hydrothermal reaction method. The syntheses were carried out using sealed stainless autoclave. Investigations of the effect of crystallization temperature, ratio of template to phosphoric pentoxide (R/P2O5), pH adjustment of gel solution and other parameters were studied. Characterization of products were carried out using powder X-ray diffraction (XRD), atomic force spectroscopy (AFM), Fourier transform infrared (FTIR), N2 adsorption-desorption BET surface, thermogravemetry (TGA) and scanning electron spectroscopy (SEM). The XRD patterns revealed that the AEL structure is obtained with high crystallinity for AlPO4-11 at crystallization temperature 190 o C. Type of template (R) and ratio of (R/P2O5) showed a great influence on XRD patterns and nano-level of particle size and optimum ratio of 1.1 was established for (R/P2O5) for AlPO4-11. AFM results showed that a nano-level has been got of 95 nm. Mapo-11 synthesized w...

Research paper thumbnail of Synthesis and Characterization of Nano

Nano-crystalline ZSM5 zeolite was synthesized by hydrothermal method us ing chelating agent and t... more Nano-crystalline ZSM5 zeolite was synthesized by hydrothermal method us ing chelating agent and two gel compositions:Composition ɪ:Al 2O3:86SiO 10Na2O:2.6Trien:2626H2O.Study of hydrothermal reaction factors on charact eristics of nano carried on ,among them are crystallization temperat ure, crystallization time and concentrati solution. Synthesis was accomplished in PTFE lined autoclave ( reactor ) . The product were characteri zed by X diffraction ( XRD ),Atomic force microscopy ( AFM ) ,scanning electron microscopy, Fourier transform in frared ( FTIR ) and Brunauer-Emmet-Teller (N 2 absorption synthesized zeolite increase with increasing crysta llization time and temperature. AFM results indicat e that a nano level of about 50nm was reached for "particle average diameter". "1080,800,550,450 cm -1" have been clearly obtained, (TPAOH) solution concentration on crystallinity and

Research paper thumbnail of Removal of 4-nitro-phenol from wastewater using synthetic zeolite and kaolin clay

Korean Journal of Chemical Engineering, 2013

Adsorption techniques are widely used to remove certain classes of pollutants from wastewater. Ph... more Adsorption techniques are widely used to remove certain classes of pollutants from wastewater. Phenolic compounds represent one of the problematic groups. Na-Y zeolite has been synthesized from locally available Iraqi kaolin clay. Characterization of the prepared zeolite was made by XRD and surface area measurement using N 2 adsorption. Both synthetic Na-Y zeolite and kaolin clay have been tested for adsorption of 4-Nitro-phenol in batch mode experiments. Maximum removal efficiencies of 90% and 80% were obtained using the prepared zeolite and kaolin clay, respectively. Kinetics and equilibrium adsorption isotherms were investigated. Investigations showed that both Langmuir and Freundlich isotherms fit the experimental data quite well. On the other hand, the adsorption of phenol was found to obey first-order kinetics.