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The effect of compositing multiwalled carbon nanotubes (MWCNTs) with polystyrene (PS) to fabricate nanofibrous membrane by electrospinning technique and comparing the direct contact membrane distillation (DCMD) performance of the blank and composite membranes is evaluated numerically. Surface morphology of both the pristine and the composite membrane was studied by SEM imaging while the average fiber diameter and average pore size were measured using ImageJ software. Static water contact angle and porosities were also determined for both membranes. Results showed significant enhancement in both the hydrophobicity and porosity of the composite membrane by increasing the static water contact angle from 145.4° for the pristine PS membrane to 155° for the PS/MWCNTs composite membrane while the porosity was increased by 28%. Simulation results showed that at any given feed inlet temperature, the PS/MWCNTs membrane have higher permeate flux and better overall system performance.
Asmaa Elrasheedy; Mohammed Rabie; Ahmed El-Shazly; Mohamed Bassyouni; S.M.S. Abdel-Hamid; Marwa El Kady. Numerical Investigation of Fabricated MWCNTs/Polystyrene Nanofibrous Membrane for DCMD. Polymers 2021, 13, 160 .
AMA StyleAsmaa Elrasheedy, Mohammed Rabie, Ahmed El-Shazly, Mohamed Bassyouni, S.M.S. Abdel-Hamid, Marwa El Kady. Numerical Investigation of Fabricated MWCNTs/Polystyrene Nanofibrous Membrane for DCMD. Polymers. 2021; 13 (1):160.
Chicago/Turabian StyleAsmaa Elrasheedy; Mohammed Rabie; Ahmed El-Shazly; Mohamed Bassyouni; S.M.S. Abdel-Hamid; Marwa El Kady. 2021. "Numerical Investigation of Fabricated MWCNTs/Polystyrene Nanofibrous Membrane for DCMD." Polymers 13, no. 1: 160.
In this work, a novel triple-layer nanocomposite membrane prepared with polyethersulfone (PES)/carbon nanotubes (CNTs) as the primary bulk material and poly (vinylidene fluoride-co-hexafluoro propylene) (PcH)/CNTs as the outer and inner surfaces of the membrane by using electrospinning method is introduced. Modified PES with CNTs was chosen as the bulk material of the triple-layer membrane to obtain a high porosity membrane. Both the upper and lower surfaces of the triple-layer membrane were coated with PcH/CNTs using electrospinning to get a triple-layer membrane with high total porosity and noticeable surface hydrophobicity. Combining both characteristics, next to an acceptable bulk hydrophobicity, resulted in a compelling membrane for membrane distillation (MD) applications. The prepared membrane was utilized in a direct contact MD system, and its performance was evaluated in different salt solution concentrations, feed velocities and feed solution temperatures. The results of the prepared membrane in this study were compared to those reported in previously published papers. Based on the evaluated membrane performance, the triple-layer nanocomposite membrane can be considered as a potential alternative with reasonable cost, relative to other MD membranes.
Mohamed Elmarghany; Ahmed H. El-Shazly; Saeid Rajabzadeh; Mohamed S. Salem; Mahmoud A. Shouman; Mohamed Nabil Sabry; Hideto Matsuyama; Norhan Nady. Triple-Layer Nanocomposite Membrane Prepared by Electrospinning Based on Modified PES with Carbon Nanotubes for Membrane Distillation Applications. Membranes 2020, 10, 15 .
AMA StyleMohamed Elmarghany, Ahmed H. El-Shazly, Saeid Rajabzadeh, Mohamed S. Salem, Mahmoud A. Shouman, Mohamed Nabil Sabry, Hideto Matsuyama, Norhan Nady. Triple-Layer Nanocomposite Membrane Prepared by Electrospinning Based on Modified PES with Carbon Nanotubes for Membrane Distillation Applications. Membranes. 2020; 10 (1):15.
Chicago/Turabian StyleMohamed Elmarghany; Ahmed H. El-Shazly; Saeid Rajabzadeh; Mohamed S. Salem; Mahmoud A. Shouman; Mohamed Nabil Sabry; Hideto Matsuyama; Norhan Nady. 2020. "Triple-Layer Nanocomposite Membrane Prepared by Electrospinning Based on Modified PES with Carbon Nanotubes for Membrane Distillation Applications." Membranes 10, no. 1: 15.
The semiconductor devices are widely employed for many applications. A significant amount of the heat must be dissipated properly to keep the devices' performance stable. Additionally, under high operation temperatures, a physical damage is possible due to thermal stresses that threaten the safety components and increase the failure rate. The development in the direction of more tightly packed electronic devices increases the challenges of offering an efficient cooling for these devices under high heat fluxes in a very restricted space. Hence, an advanced cooling technique is compulsory to attain the appropriate performance along with extending the lifespan of microelectronic devices. Stepwise varying width microchannel heat sink is considered one of the innovative cooling system from these microelectronic devices. In the current study, different designs of stepwise varying width microchannel heat sink were optimized, and their thermal performance was studied for more uniform cooling of microelectronics devices.
Essam M. Abo-Zahhad; Shinichi Ookawara; Ali Radwan; M.F. Elkady; A.H. El-Shazly. Optimization of stepwise varying width microchannel heat sink for high heat flux applications. Case Studies in Thermal Engineering 2020, 18, 100587 .
AMA StyleEssam M. Abo-Zahhad, Shinichi Ookawara, Ali Radwan, M.F. Elkady, A.H. El-Shazly. Optimization of stepwise varying width microchannel heat sink for high heat flux applications. Case Studies in Thermal Engineering. 2020; 18 ():100587.
Chicago/Turabian StyleEssam M. Abo-Zahhad; Shinichi Ookawara; Ali Radwan; M.F. Elkady; A.H. El-Shazly. 2020. "Optimization of stepwise varying width microchannel heat sink for high heat flux applications." Case Studies in Thermal Engineering 18, no. : 100587.
Polymeric membranes have been widely employed for water purification applications. However, the trade-off issue between the selectivity and permeability has limited its use in various applications. Mixed matrix membranes (MMMs) were introduced to overcome this limitation and to enhance the properties and performance of polymeric membranes by incorporation of fillers such as silica and zeolites. Metal-organic frameworks (MOFs) are a new class of hybrid inorganic–organic materials that are introduced as novel fillers for incorporation in polymeric matrix to form composite membranes for different applications especially water desalination. A major advantage of MOFs over other inorganic fillers is the possibility of preparing different structures with different pore sizes and functionalities, which are designed especially for a targeted application. Different MMMs fabrication techniques have also been investigated to fabricate MMMs with pronounced properties for a specific application. Synthesis techniques include blending, layer-by-layer (LBL), gelatin-assisted seed growth and in situ growth that proved to give the most homogenous dispersion of MOFs within the organic matrix. It was found that the ideal filler loading of MOFs in different polymeric matrices is 10%, increasing the filler loading beyond this value led to formation of aggregates that significantly decreased the MOFs-MMMs performance. Despite the many merits of MOFs-MMMs, the main challenge facing the upscaling and wide commercial application of MOFs-MMMs is the difficult synthesis conditions of the MOFs itself and the stability and sustainability of MOFs-MMMs performance. Investigation of new MOFs and MOFs-MMMs synthesis techniques should be carried out for further industrial applications. Among these new synthesis methods, green MOFs synthesis has been highlighted as low cost, renewable, environmentally friendly and recyclable starting materials for MOFs-MMMs. This paper will focus on the investigation of the effect of different recently introduced MOFs on the performance of MOFs-MMMs in water purification applications.
Asmaa Elrasheedy; Norhan Nady; Mohamed Bassyouni; Ahmed El-Shazly. Metal Organic Framework Based Polymer Mixed Matrix Membranes: Review on Applications in Water Purification. Membranes 2019, 9, 88 .
AMA StyleAsmaa Elrasheedy, Norhan Nady, Mohamed Bassyouni, Ahmed El-Shazly. Metal Organic Framework Based Polymer Mixed Matrix Membranes: Review on Applications in Water Purification. Membranes. 2019; 9 (7):88.
Chicago/Turabian StyleAsmaa Elrasheedy; Norhan Nady; Mohamed Bassyouni; Ahmed El-Shazly. 2019. "Metal Organic Framework Based Polymer Mixed Matrix Membranes: Review on Applications in Water Purification." Membranes 9, no. 7: 88.
Computational fluid dynamics (CFD) techniques were implemented to develop a 3-D numerical model to investigate the effect of several inlet conditions on the heat and mass transfer through a commercial PTFE membrane in a specific direct contact membrane distillation (DCMD) cell design. The model was validated against other researchers’ results and was found to have a good arrangement. The model was then used to predict the effects of changing the direction of the flow, inlet Reynolds number and feed inlet temperature on the permeate flux through the membrane and the process thermal efficiency. It has been found that changing the flow arrangement from parallel to counter flow slightly increased the permeate flux. Changing the inlet Reynolds number from 25 to 50 significantly increased the permeate flux and the process thermal efficiency, while raising it from 50 to 150 had little to no effect. It has also been found that increasing the feed inlet temperature from 303 K to 323 K almost tripled the permeate flux.
Mohamed S. Salem; Ahmed H. El-Shazly; Norhan Nady; Mohamed R. Elmarghany; Mahmoud A. Shouman; Mohamed Nabil Sabry. 3-D numerical investigation on commercial PTFE membranes for membrane distillation: Effect of inlet conditions on heat and mass transfer. Case Studies in Thermal Engineering 2019, 13, 100396 .
AMA StyleMohamed S. Salem, Ahmed H. El-Shazly, Norhan Nady, Mohamed R. Elmarghany, Mahmoud A. Shouman, Mohamed Nabil Sabry. 3-D numerical investigation on commercial PTFE membranes for membrane distillation: Effect of inlet conditions on heat and mass transfer. Case Studies in Thermal Engineering. 2019; 13 ():100396.
Chicago/Turabian StyleMohamed S. Salem; Ahmed H. El-Shazly; Norhan Nady; Mohamed R. Elmarghany; Mahmoud A. Shouman; Mohamed Nabil Sabry. 2019. "3-D numerical investigation on commercial PTFE membranes for membrane distillation: Effect of inlet conditions on heat and mass transfer." Case Studies in Thermal Engineering 13, no. : 100396.
The morphology and surface area of the poly(aniline-co-pyrrole) copolymer (PANPY) are important properties which improve the efficiency of the copolymer in various applications. In this investigation, different techniques were employed to produce PANPY in different morphologies. Aniline and pyrrole were used as monomers, and ammonium peroxydisulfate (APS) was used as an oxidizer with uniform molar ratio. Rapid mixing, drop-wise mixing, and supercritical carbon dioxide (ScCO2) polymerization techniques were appointed. The chemical structure, crystallinity, porosity, and morphology of the composite were distinguished by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Brunauer, Emmett and Teller (BET) analysis, and transmission electron microscopy (TEM) respectively. The characterization tests indicated that the polyaniline/polypyrrole copolymer was successfully prepared with different morphologies. Based on the obtained TEM, hollow nanospheres were formed using rapid mixing technique with acetic acid that have a diameter of 75 nm and thickness 26 nm approximately. Also, according to the XRD, the produced structures have a semi- crystalline structure. The synthesized copolymer with ScCO2-assisted polymerization technique showed improved surface area (38.1 m2/g) with HCl as dopant.
A S Hammad; H Noby; M F Elkady; A H El-Shazly. In-situ Polymerization of Polyaniline/Polypyrrole Copolymer using Different Techniques. IOP Conference Series: Materials Science and Engineering 2018, 290, 12001 .
AMA StyleA S Hammad, H Noby, M F Elkady, A H El-Shazly. In-situ Polymerization of Polyaniline/Polypyrrole Copolymer using Different Techniques. IOP Conference Series: Materials Science and Engineering. 2018; 290 (1):12001.
Chicago/Turabian StyleA S Hammad; H Noby; M F Elkady; A H El-Shazly. 2018. "In-situ Polymerization of Polyaniline/Polypyrrole Copolymer using Different Techniques." IOP Conference Series: Materials Science and Engineering 290, no. 1: 12001.
H. Dewidar; S.A. Nosier; A.H. El-Shazly. Photocatalytic degradation of phenol solution using Zinc Oxide/UV. ACS Chemical Health & Safety 2018, 25, 2 -11.
AMA StyleH. Dewidar, S.A. Nosier, A.H. El-Shazly. Photocatalytic degradation of phenol solution using Zinc Oxide/UV. ACS Chemical Health & Safety. 2018; 25 (1):2-11.
Chicago/Turabian StyleH. Dewidar; S.A. Nosier; A.H. El-Shazly. 2018. "Photocatalytic degradation of phenol solution using Zinc Oxide/UV." ACS Chemical Health & Safety 25, no. 1: 2-11.
In dye decolorization tests a non-thermal plasma (NTP) corona discharge generated by a high voltage pin-to-ground plate displayed 82% color removal within 11 min. Total color removal was accomplished after 28 min. Different salts such as KCl, NaCl, CaCl2 and AlCl3 were utilized to check the influence of conductivity changes on the dye decolorization process. Higher dye solution conductivity improved the color removal efficiency. The discharge energy and degradation efficiency were computed for diverse concentrations for NaCl, KCl, CaCl2 and AlCl3, whereby it was noticed that the salts generally have a small impact on the level of dye decolorization using corona discharge. In addition, the essential reactive species involved in the oxidation of organic dye compounds such as ozone (O3) generated in treated water and hydrogen peroxide (H2O2) were investigated and the energetic species that produced the non-thermal plasma at the optimum operation time were determined. Energy yields for decolorization and Electrical Energy per Order (EE/O) were calculated for different concentrations of NaCl, KCl, CaCl2 and AlCl3. This work may help in designing plasma systems appropriate for treatment of industrial wastewaters polluted by dyes.
Ahmed El-Tayeb; Ahmed H. El-Shazly; Marwa F. Elkady. Investigation the Influence of Different Salts on the Degradation of Organic Dyes Using Non-Thermal Plasma. Energies 2016, 9, 874 .
AMA StyleAhmed El-Tayeb, Ahmed H. El-Shazly, Marwa F. Elkady. Investigation the Influence of Different Salts on the Degradation of Organic Dyes Using Non-Thermal Plasma. Energies. 2016; 9 (11):874.
Chicago/Turabian StyleAhmed El-Tayeb; Ahmed H. El-Shazly; Marwa F. Elkady. 2016. "Investigation the Influence of Different Salts on the Degradation of Organic Dyes Using Non-Thermal Plasma." Energies 9, no. 11: 874.
Surface modification becomes an effective tool for improvement of both flux and selectivity of membrane by reducing the adsorption of the components of the fluid used onto its surface. A successful green modification of poly(ethersulfone) (PES) membranes using ortho-aminophenol (2-AP) modifier and laccase enzyme biocatalyst under very flexible conditions is presented in this paper. The modified PES membranes were evaluated using many techniques including total color change, pure water flux, and protein repellence that were related to the gravimetric grafting yield. In addition, static water contact angle on laminated PES layers were determined. Blank and modified commercial membranes (surface and cross-section) and laminated PES layers (surface) were imaged by scanning electron microscope (SEM) and scanning probe microscope (SPM) to illustrate the formed modifying poly(2-aminophenol) layer(s). This green modification resulted in an improvement of both membrane flux and protein repellence, up to 15.4% and 81.27%, respectively, relative to the blank membrane.
Norhan Nady; Ahmed H. El-Shazly; Hesham M. A. Soliman; Sherif H. Kandil. Protein-Repellence PES Membranes Using Bio-grafting of Ortho-aminophenol. Polymers 2016, 8, 306 .
AMA StyleNorhan Nady, Ahmed H. El-Shazly, Hesham M. A. Soliman, Sherif H. Kandil. Protein-Repellence PES Membranes Using Bio-grafting of Ortho-aminophenol. Polymers. 2016; 8 (8):306.
Chicago/Turabian StyleNorhan Nady; Ahmed H. El-Shazly; Hesham M. A. Soliman; Sherif H. Kandil. 2016. "Protein-Repellence PES Membranes Using Bio-grafting of Ortho-aminophenol." Polymers 8, no. 8: 306.
This work investigates the effect of operating conditions on the rate of Cu2+ removal from synthetic waste of copper sulphate solution by cementation on a fixed bed of zinc cylinders under different conditions of solution flow rate, initial copper sulphate concentration, bed height, cylinder diameter and solution temperature. The values of the mass transfer coefficient was found to increase with increasing solution flow rate and temperature, while it decreased with increasing bed height, cylinders diameter and initial copper sulphate concentration. The value of the activation energy of the reaction ranged from 2.5 to 4.60 kCal/mol with lower and higher solution flow rates, respectively, which show that the reaction is diffusion controlled. The mass transfer correlation was deduced by dimensional analysis and was found to be in the form that: Sh = 2.1 Re0.867 Sc0.33 (d/h)−1.02. In addition, another correlation was deduced for the effect of entrance region by removing the calming section which was found to be in the form that: Sh = 2.30 Re0.870 Sc0.33 (d/h)−0.96. The obtained results can help in the design of a continuous flow reactor that may be used for the removal of heavy metals from wastewater.
A.H. El-Shazly; A.M. Nassr; A.A. Mubarak; A.A. Zaatout. Effect of operating conditions on the Cu2+removal from wastewater by cementation on a fixed bed of zinc cylinders. DESALINATION AND WATER TREATMENT 2016, 57, 22835 -22841.
AMA StyleA.H. El-Shazly, A.M. Nassr, A.A. Mubarak, A.A. Zaatout. Effect of operating conditions on the Cu2+removal from wastewater by cementation on a fixed bed of zinc cylinders. DESALINATION AND WATER TREATMENT. 2016; 57 (48-49):22835-22841.
Chicago/Turabian StyleA.H. El-Shazly; A.M. Nassr; A.A. Mubarak; A.A. Zaatout. 2016. "Effect of operating conditions on the Cu2+removal from wastewater by cementation on a fixed bed of zinc cylinders." DESALINATION AND WATER TREATMENT 57, no. 48-49: 22835-22841.
This work investigates the possibility of improving the rate of Cu+2 recovery and/or removal from industrial wastewater by cementation technique using an array of pulsating horizontal perforated zinc discs. The results show that the rate of cementation was found to increase by increasing frequency and amplitude of oscillation (vibrating velocity); disc diameter; copper ion concentration and solution temperature while decreasing by increasing the disc separation. Under certain conditions using pulsating array of perforated zinc discs was found to increase the rate of mass transfer by a factor of 17 times the stagnant discs. The activation energy of the reaction was found to be 8.948kcal/mol which indicates that under the present conditions cementation takes place under mixed control, i.e. the reaction is partially diffusion control. As such no overall mass transfer correlation could be obtained
A.H. El-Shazly; A.A. Mubarak; H.A. Farag; A.G. Fadl. Improving the rate of Cu+2 recovery from industrial wastewater using a vertical array of reciprocating perforated zinc discs. Alexandria Engineering Journal 2015, 54, 71 -76.
AMA StyleA.H. El-Shazly, A.A. Mubarak, H.A. Farag, A.G. Fadl. Improving the rate of Cu+2 recovery from industrial wastewater using a vertical array of reciprocating perforated zinc discs. Alexandria Engineering Journal. 2015; 54 (1):71-76.
Chicago/Turabian StyleA.H. El-Shazly; A.A. Mubarak; H.A. Farag; A.G. Fadl. 2015. "Improving the rate of Cu+2 recovery from industrial wastewater using a vertical array of reciprocating perforated zinc discs." Alexandria Engineering Journal 54, no. 1: 71-76.
Zinc oxide nano-powder was prepared using sol-gel technique to be encapsulated onto polymeric blend composed from alginate and polyvinyl alcohol to fabricate novel bio-composite beads of nano-zinc oxide. The XRD patterns of both zinc oxide nano-powder and its polymeric hybrid were crystalline in their nature. The FTIR analysis of the fabricated ZnO polymeric hybrid confirms the binding between zinc oxide and the polymeric matrix. The BET analysis demonstrated that the calculated specific surface area of the formulated ZnO beads that equal to 22.8 m2/g is comparatively less than that of the free ZnO nano-powdered that equivalent to 64.9 m2/g. The thermal stability of ZnO nano-powdered dramatically decreased with its immobilization into the polymeric alginate and PVA matrix. The formulated beads had very strong mechanical strength and they are difficult to be broken up to 1500rpm. Moreover, this hybrid beads are chemically stable at the acidic media. The formulated ZnO hybrid beads verified to be good adsorbent material for C.I basic blue 41 (CB41).
M. F. Elkady; H. Shokry Hassan; A. H. El-Shazly. Formulation of nano-zinc oxide into biocomposite beads for dye decolorization. 4TH INTERNATIONAL CONGRESS IN ADVANCES IN APPLIED PHYSICS AND MATERIALS SCIENCE (APMAS 2014) 2015, 1653, 20036 .
AMA StyleM. F. Elkady, H. Shokry Hassan, A. H. El-Shazly. Formulation of nano-zinc oxide into biocomposite beads for dye decolorization. 4TH INTERNATIONAL CONGRESS IN ADVANCES IN APPLIED PHYSICS AND MATERIALS SCIENCE (APMAS 2014). 2015; 1653 ():20036.
Chicago/Turabian StyleM. F. Elkady; H. Shokry Hassan; A. H. El-Shazly. 2015. "Formulation of nano-zinc oxide into biocomposite beads for dye decolorization." 4TH INTERNATIONAL CONGRESS IN ADVANCES IN APPLIED PHYSICS AND MATERIALS SCIENCE (APMAS 2014) 1653, no. : 20036.
The sol-gel prepared zinc oxide nanopowder was immobilized onto alginate-polyvinyl alcohol polymer blend to fabricate novel biocomposite beads. Various physicochemical characterization techniques have been utilized to identify the crystalline, morphological, and chemical structures of both the fabricated zinc oxide hybrid beads and their corresponding zinc oxide nanopowder. The thermal stability investigations demonstrate that ZnO nanopowder stability dramatically decreased with its immobilization into the polymeric alginate and PVA matrix. The formulated beads had very strong mechanical strength and they are difficult to be broken up to 1500rpm. Moreover, these hybrid beads are chemically stable at the acidic media (pH < 7) especially within the pH range of 27. Finally, the applicability of the formulated ZnO hybrid beads for C.I. basic blue 41 (BB41) decolorization from aqueous solution was examined.
H. Shokry Hassan; M. F. Elkady; A. H. El-Shazly; Hisham S. Bamufleh. Formulation of Synthesized Zinc Oxide Nanopowder into Hybrid Beads for Dye Separation. Journal of Nanomaterials 2014, 2014, 1 -14.
AMA StyleH. Shokry Hassan, M. F. Elkady, A. H. El-Shazly, Hisham S. Bamufleh. Formulation of Synthesized Zinc Oxide Nanopowder into Hybrid Beads for Dye Separation. Journal of Nanomaterials. 2014; 2014 (3):1-14.
Chicago/Turabian StyleH. Shokry Hassan; M. F. Elkady; A. H. El-Shazly; Hisham S. Bamufleh. 2014. "Formulation of Synthesized Zinc Oxide Nanopowder into Hybrid Beads for Dye Separation." Journal of Nanomaterials 2014, no. 3: 1-14.
This work investigates the possibility of using pulsating liquid flow for improving the performance of humidification–dehumidification desalination unit. The results showed that the unit productivity has been increased by increasing the off time i.e. decreasing the frequency of pulsed water flow up to certain levels, a frequency of 20/60 on/off time was found to have the highest productivity of the unit. Increasing the amplitude of water pulsation (water flow per pulse) was found to increase the unit productivity as well. Other variables such as inlet water temperature, and air flow rate were investigated. The heat and mass transfer analysis of the humidification unit was carried out, the results showed that the experimental value of hyMky is higher than the predicted one. In addition analysis of the dehumidification unit was carried out, the results showed that the unit productivity has been increased by increasing the inlet cooling water flow rate and that the overall heat transfer coefficient (U) was found to be 38.25 W/m2.K which is considered within the range of industrial air water heat transfer units.
A.H. El-Shazly; A.A. Al-Zahrani; Yahia Alhamed; S.A. Nosier. Productivity intensification of humidification–dehumidification desalination unit by using pulsed water flow regime. Desalination 2012, 293, 53 -60.
AMA StyleA.H. El-Shazly, A.A. Al-Zahrani, Yahia Alhamed, S.A. Nosier. Productivity intensification of humidification–dehumidification desalination unit by using pulsed water flow regime. Desalination. 2012; 293 ():53-60.
Chicago/Turabian StyleA.H. El-Shazly; A.A. Al-Zahrani; Yahia Alhamed; S.A. Nosier. 2012. "Productivity intensification of humidification–dehumidification desalination unit by using pulsed water flow regime." Desalination 293, no. : 53-60.
M.S.M. Abdel-Aziz; A.H. El-Shazly; H.A. Farag; G.H. Sedahmed. Mass transfer behavior of rotating square cylinder electrochemical reactor in relation to wastewater treatment. Energy Conversion and Management 2011, 52, 2870 -2875.
AMA StyleM.S.M. Abdel-Aziz, A.H. El-Shazly, H.A. Farag, G.H. Sedahmed. Mass transfer behavior of rotating square cylinder electrochemical reactor in relation to wastewater treatment. Energy Conversion and Management. 2011; 52 (8-9):2870-2875.
Chicago/Turabian StyleM.S.M. Abdel-Aziz; A.H. El-Shazly; H.A. Farag; G.H. Sedahmed. 2011. "Mass transfer behavior of rotating square cylinder electrochemical reactor in relation to wastewater treatment." Energy Conversion and Management 52, no. 8-9: 2870-2875.
The effect of vertical plate electrode pulsation on the rate of cathodic copper deposition and anodic oxidation of ferrous sulphate was studied in a divided cell. Electrode oscillation was found to enhance the rate of diffusion controlled copper deposition and ferrous sulphate anodic oxidation by a factor ranging from 1.9 to 7.8 compared to the natural convection value depending on the vibration velocity. Electrode pulsation was found to increase the current efficiency of copper deposition from 52% to 98%, while the current efficiency of anodic oxidation of FeSO4 increased from 35% to 92% depending on the vibration velocity. Also, electrode vibration was found to decrease electrical energy consumption of copper deposition from 4 to 1.56 kWh/kg; for anodic oxidation of FeSO4 electrode vibration reduces energy consumption from 3.35 to 1.25 kWh/kg depending on vibration velocity. The importance of the present results for treating dilute solutions containing copper and ferrous ions such as printed circuit etching solution, pickling waste solutions, chemical machining waste solution, mine drainage water, leaching liquor obtained by leaching low grade copper sulphide ore by ferric salts was highlighted. The present technique has the advantage of recovering a precious metal and recycling a valuable chemical in one step, this satisfies the policy of zero discharge industry.
D.A. El-Gayar; A.H. El-Shazly; Y.A. El-Taweel; G.H. Sedahmed. Effect of electrode pulsation on the rate of simultaneous electrochemical recovery of copper and regeneration of ferric salts from dilute solutions. Chemical Engineering Journal 2010, 162, 877 -882.
AMA StyleD.A. El-Gayar, A.H. El-Shazly, Y.A. El-Taweel, G.H. Sedahmed. Effect of electrode pulsation on the rate of simultaneous electrochemical recovery of copper and regeneration of ferric salts from dilute solutions. Chemical Engineering Journal. 2010; 162 (3):877-882.
Chicago/Turabian StyleD.A. El-Gayar; A.H. El-Shazly; Y.A. El-Taweel; G.H. Sedahmed. 2010. "Effect of electrode pulsation on the rate of simultaneous electrochemical recovery of copper and regeneration of ferric salts from dilute solutions." Chemical Engineering Journal 162, no. 3: 877-882.
Rates of mass transfer between the walls of a rectangular agitated vessel and solution were studied by measuring the limiting current of the cathodic reduction of ferricyanide ion at the vessel wall. Variables studied were rotation speed of 45° pitched blade turbine impeller, physical properties of the solution and the presence of drag reducing polymer in lhe solution (Polyox WSR-301). The data were correlated for polymer free solution by the equation: Sh= 1.925 Sc0.33 Re0.5 Comparison of the present data with previous heat and mass transfer studies conducted in cylindrical vessels has shown that the mass transfer behaviour of agitated rectangular vessels lie between baffled and unbaffled agitated cylindrical vessels. Polyox addition was found to reduce the mass transfer coefficient by an amount ranging from 5.6 to 37% depending on polymer concentration. Practical implications of using drag reducing polymers in agitated vessels were discussed.
A. H. El-Shazly; S. A. Nosier; M. Z. El-Abd; G. H. Sedahmed. SOLID-LIQUID MASS TRANSFER AT THE WALLS OF A RECTANGULAR AGITATED VESSEL. Chemical Engineering Communications 1997, 158, 31 -41.
AMA StyleA. H. El-Shazly, S. A. Nosier, M. Z. El-Abd, G. H. Sedahmed. SOLID-LIQUID MASS TRANSFER AT THE WALLS OF A RECTANGULAR AGITATED VESSEL. Chemical Engineering Communications. 1997; 158 (1):31-41.
Chicago/Turabian StyleA. H. El-Shazly; S. A. Nosier; M. Z. El-Abd; G. H. Sedahmed. 1997. "SOLID-LIQUID MASS TRANSFER AT THE WALLS OF A RECTANGULAR AGITATED VESSEL." Chemical Engineering Communications 158, no. 1: 31-41.