... The membrane to be used in the fuel cell applications must be stable in the fuel ... PES cont... more ... The membrane to be used in the fuel cell applications must be stable in the fuel ... PES content may be the result of possible intermolecular interaction ie hydrogen bond. ... 2 illustrates the thermogravimetric analysis (TGA) for four prepared membranes at the temperature range of 50 ...
Cesium hydrogen salt of heteropolyacids (CsHPs) including Cs2.5H0.5PMo12O40 (CsPMo) and Cs2.5H0.5... more Cesium hydrogen salt of heteropolyacids (CsHPs) including Cs2.5H0.5PMo12O40 (CsPMo) and Cs2.5H0.5PW12O40 (CsPW) are incorporated into Nafion to produce stable nanocomposite membranes at the moderate temperature/low relative humidity (RH). The addition of hygroscopic and conductive CsHP enhances the water content but limits the activity of the sulfonic group of the Nafion. As a result, ion exchange capacity (IEC) is decreased. The
International Journal of Chemical Reactor Engineering, Apr 8, 2010
In this research, we have demonstrated the feasibility of fabrication of a novel metal membrane b... more In this research, we have demonstrated the feasibility of fabrication of a novel metal membrane by wire arc spraying. The feedstock wires were made of carbon steel (1.1% C, 1.9% Mn, and 1.8% Cr). The effects of stand-off distance between the gun and the substrate and the pressure of atomizing gas on the oxides, the porosity and mean pore size of the prepared membranes were studied. The SEM micrograph showed that the prepared membranes are asymmetrically porous. They were not uniform. The performance of prepared membranes was elucidated using gas stream containing hydrogen sulfide. The membranes with higher porosity exhibited gas permeability. Hydrogen sulfide reacts with the available iron in the membrane and produces iron sulfide and hydrogen. Hydrogen sulfide was considerably removed from the gas stream. The EDX test on the reacted membrane indicated that FeS covered the active surface of the metal membrane.
With consideration of the increasing energy demand and deficit of fossil fuel resources, the best... more With consideration of the increasing energy demand and deficit of fossil fuel resources, the best way for the conquest of renewable resources alternation is the use of hybrid system. In this research, the performance of wind-photovoltaic hybrid system for providing the required electrical energy for a big ministerial building in Kermanshah city is investigated. The required electrical load for the month of a year was calculated 178000 kWh/year by using average electrical energy consumption. With consideration of wind average velocity for hours of a year, Weibull and Rayleigh distribution functions for this location was determined. Also, the power and annual energy of each turbine using wind speed data was calculated. The amount of average solar radiation by use of solar energy relations was calculated, and then, with consideration of annual total energy, the required annual wind energy versus solar cell surfaces selection was determined. Finally, the type and number of turbines by u...
In this work, the Interfacial interfacial polymerization (IP) technique was employed using tereph... more In this work, the Interfacial interfacial polymerization (IP) technique was employed using terephthaloyl chloride (TPC) and p-phenylenediamine (PPD), as reactant monomers, to prepare poly(paraphenylene terephthalamide) thin film composite (TFC) nanofiltration on polyethersulphone (PES) support layer. The effects of six different anionic and non-ionic surfactants, in the aqueous phase on the morphology and performance of membranes were investigated. The performance of membranes was evaluated by the pure water flux (PWF) and the rejection of salt solutions. By addition of anionic surfactants, the morphology and performance were unaltered, while, in the presence of non-ionic surfactants, both morphology and performance were changed. Furthermore, the conditions for IP process were examined.
Cation exchange membranes were prepared based on polyvinyl alcohol (PVA) and polyethersulfone (PE... more Cation exchange membranes were prepared based on polyvinyl alcohol (PVA) and polyethersulfone (PES) polymer blends using dimethyl sulfoxide as solvent and phosphotungstic acid (PWA) as functional group agent. The membranes were fabricated by solution casting method. The effects of PVA-to-PES polymer blend ratio and PWA content on the electrochemical ion exchange properties of the prepared membranes, including fixed ion concentration (FIC), membrane potential, permselectivity, surface charge density, transport number and electrical resistance, were studied. The areal electrical resistance at room temperature was reduced by increasing the PES and decreasing the PWA contents of membranes. The results show that the addition of PWA to the membranes provides additional counterion-conducting passages and enhances the FIC, membrane potential, permselectivity and transport number.
... The membrane to be used in the fuel cell applications must be stable in the fuel ... PES cont... more ... The membrane to be used in the fuel cell applications must be stable in the fuel ... PES content may be the result of possible intermolecular interaction ie hydrogen bond. ... 2 illustrates the thermogravimetric analysis (TGA) for four prepared membranes at the temperature range of 50 ...
Cesium hydrogen salt of heteropolyacids (CsHPs) including Cs2.5H0.5PMo12O40 (CsPMo) and Cs2.5H0.5... more Cesium hydrogen salt of heteropolyacids (CsHPs) including Cs2.5H0.5PMo12O40 (CsPMo) and Cs2.5H0.5PW12O40 (CsPW) are incorporated into Nafion to produce stable nanocomposite membranes at the moderate temperature/low relative humidity (RH). The addition of hygroscopic and conductive CsHP enhances the water content but limits the activity of the sulfonic group of the Nafion. As a result, ion exchange capacity (IEC) is decreased. The
International Journal of Chemical Reactor Engineering, 2010
In this research, we have demonstrated the feasibility of fabrication of a novel metal membrane b... more In this research, we have demonstrated the feasibility of fabrication of a novel metal membrane by wire arc spraying. The feedstock wires were made of carbon steel (1.1% C, 1.9% Mn, and 1.8% Cr). The effects of stand-off distance between the gun and the substrate and the pressure of atomizing gas on the oxides, the porosity and mean pore size of the prepared membranes were studied. The SEM micrograph showed that the prepared membranes are asymmetrically porous. They were not uniform. The performance of prepared membranes was elucidated using gas stream containing hydrogen sulfide. The membranes with higher porosity exhibited gas permeability. Hydrogen sulfide reacts with the available iron in the membrane and produces iron sulfide and hydrogen. Hydrogen sulfide was considerably removed from the gas stream. The EDX test on the reacted membrane indicated that FeS covered the active surface of the metal membrane.
... The membrane to be used in the fuel cell applications must be stable in the fuel ... PES cont... more ... The membrane to be used in the fuel cell applications must be stable in the fuel ... PES content may be the result of possible intermolecular interaction ie hydrogen bond. ... 2 illustrates the thermogravimetric analysis (TGA) for four prepared membranes at the temperature range of 50 ...
Cesium hydrogen salt of heteropolyacids (CsHPs) including Cs2.5H0.5PMo12O40 (CsPMo) and Cs2.5H0.5... more Cesium hydrogen salt of heteropolyacids (CsHPs) including Cs2.5H0.5PMo12O40 (CsPMo) and Cs2.5H0.5PW12O40 (CsPW) are incorporated into Nafion to produce stable nanocomposite membranes at the moderate temperature/low relative humidity (RH). The addition of hygroscopic and conductive CsHP enhances the water content but limits the activity of the sulfonic group of the Nafion. As a result, ion exchange capacity (IEC) is decreased. The
International Journal of Chemical Reactor Engineering, Apr 8, 2010
In this research, we have demonstrated the feasibility of fabrication of a novel metal membrane b... more In this research, we have demonstrated the feasibility of fabrication of a novel metal membrane by wire arc spraying. The feedstock wires were made of carbon steel (1.1% C, 1.9% Mn, and 1.8% Cr). The effects of stand-off distance between the gun and the substrate and the pressure of atomizing gas on the oxides, the porosity and mean pore size of the prepared membranes were studied. The SEM micrograph showed that the prepared membranes are asymmetrically porous. They were not uniform. The performance of prepared membranes was elucidated using gas stream containing hydrogen sulfide. The membranes with higher porosity exhibited gas permeability. Hydrogen sulfide reacts with the available iron in the membrane and produces iron sulfide and hydrogen. Hydrogen sulfide was considerably removed from the gas stream. The EDX test on the reacted membrane indicated that FeS covered the active surface of the metal membrane.
With consideration of the increasing energy demand and deficit of fossil fuel resources, the best... more With consideration of the increasing energy demand and deficit of fossil fuel resources, the best way for the conquest of renewable resources alternation is the use of hybrid system. In this research, the performance of wind-photovoltaic hybrid system for providing the required electrical energy for a big ministerial building in Kermanshah city is investigated. The required electrical load for the month of a year was calculated 178000 kWh/year by using average electrical energy consumption. With consideration of wind average velocity for hours of a year, Weibull and Rayleigh distribution functions for this location was determined. Also, the power and annual energy of each turbine using wind speed data was calculated. The amount of average solar radiation by use of solar energy relations was calculated, and then, with consideration of annual total energy, the required annual wind energy versus solar cell surfaces selection was determined. Finally, the type and number of turbines by u...
In this work, the Interfacial interfacial polymerization (IP) technique was employed using tereph... more In this work, the Interfacial interfacial polymerization (IP) technique was employed using terephthaloyl chloride (TPC) and p-phenylenediamine (PPD), as reactant monomers, to prepare poly(paraphenylene terephthalamide) thin film composite (TFC) nanofiltration on polyethersulphone (PES) support layer. The effects of six different anionic and non-ionic surfactants, in the aqueous phase on the morphology and performance of membranes were investigated. The performance of membranes was evaluated by the pure water flux (PWF) and the rejection of salt solutions. By addition of anionic surfactants, the morphology and performance were unaltered, while, in the presence of non-ionic surfactants, both morphology and performance were changed. Furthermore, the conditions for IP process were examined.
Cation exchange membranes were prepared based on polyvinyl alcohol (PVA) and polyethersulfone (PE... more Cation exchange membranes were prepared based on polyvinyl alcohol (PVA) and polyethersulfone (PES) polymer blends using dimethyl sulfoxide as solvent and phosphotungstic acid (PWA) as functional group agent. The membranes were fabricated by solution casting method. The effects of PVA-to-PES polymer blend ratio and PWA content on the electrochemical ion exchange properties of the prepared membranes, including fixed ion concentration (FIC), membrane potential, permselectivity, surface charge density, transport number and electrical resistance, were studied. The areal electrical resistance at room temperature was reduced by increasing the PES and decreasing the PWA contents of membranes. The results show that the addition of PWA to the membranes provides additional counterion-conducting passages and enhances the FIC, membrane potential, permselectivity and transport number.
... The membrane to be used in the fuel cell applications must be stable in the fuel ... PES cont... more ... The membrane to be used in the fuel cell applications must be stable in the fuel ... PES content may be the result of possible intermolecular interaction ie hydrogen bond. ... 2 illustrates the thermogravimetric analysis (TGA) for four prepared membranes at the temperature range of 50 ...
Cesium hydrogen salt of heteropolyacids (CsHPs) including Cs2.5H0.5PMo12O40 (CsPMo) and Cs2.5H0.5... more Cesium hydrogen salt of heteropolyacids (CsHPs) including Cs2.5H0.5PMo12O40 (CsPMo) and Cs2.5H0.5PW12O40 (CsPW) are incorporated into Nafion to produce stable nanocomposite membranes at the moderate temperature/low relative humidity (RH). The addition of hygroscopic and conductive CsHP enhances the water content but limits the activity of the sulfonic group of the Nafion. As a result, ion exchange capacity (IEC) is decreased. The
International Journal of Chemical Reactor Engineering, 2010
In this research, we have demonstrated the feasibility of fabrication of a novel metal membrane b... more In this research, we have demonstrated the feasibility of fabrication of a novel metal membrane by wire arc spraying. The feedstock wires were made of carbon steel (1.1% C, 1.9% Mn, and 1.8% Cr). The effects of stand-off distance between the gun and the substrate and the pressure of atomizing gas on the oxides, the porosity and mean pore size of the prepared membranes were studied. The SEM micrograph showed that the prepared membranes are asymmetrically porous. They were not uniform. The performance of prepared membranes was elucidated using gas stream containing hydrogen sulfide. The membranes with higher porosity exhibited gas permeability. Hydrogen sulfide reacts with the available iron in the membrane and produces iron sulfide and hydrogen. Hydrogen sulfide was considerably removed from the gas stream. The EDX test on the reacted membrane indicated that FeS covered the active surface of the metal membrane.
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Papers by Mehdi Amirinejad