Mustafa Demircioglu - Academia.edu (original) (raw)

Papers by Mustafa Demircioglu

Industrial & Engineering Chemistry Research, 1999

Desalination, 2003

The separation performance of K+ ions from KC1 solution has been investigated by electrodialysis ... more The separation performance of K+ ions from KC1 solution has been investigated by electrodialysis at constant voltage mode of operation as a fimction of flow rate and voltage scanned. TS-l-10 model electrodialysis equipment (Tokuyama) modified with rotameters was employed in experimental runs. The efficiencies of each unsteady state run were evaluated as specific power consumption with the electrical energy consumed only in stack. The separation performance of K' ions was compared with that of Na' ions.

Desalination, 2001

The separation performance of Na+ ions from NaCl solution has been investigated by electrodialysi... more The separation performance of Na+ ions from NaCl solution has been investigated by electrodialysis at constant voltage mode of operation. TS-1-10 electrodialysis equipment (Tokuyama) modified with rotameters was employed in experimental studies. During an unsteady-state run of the ED system, both inlet and outlet concentrations of both concentrate and dilute streams were measured at time intervals of 5 min until

Desalination, 2003

... Kabaya*, M. Arda b, I. Kurucaovalia, E. Ersoza, H. Kahvecia, M. Cana, S. Data,S. Kopuzlua, M.... more ... Kabaya*, M. Arda b, I. Kurucaovalia, E. Ersoza, H. Kahvecia, M. Cana, S. Data,S. Kopuzlua, M. Hanera, M. Demircioglua, M. Yuksela"Department f Chemical Engineering, Faculty of Engineering,Ege University, 35100 Iimir; TurkeyTel/Fax -90 (232J 3887600; e-mail: kabay@eng ...

Industrial & Engineering Chemistry Research, 1998

Experimental measurements have been made on the batch extraction of uranium from phosphoric acid ... more Experimental measurements have been made on the batch extraction of uranium from phosphoric acid solutions using various chelating ion-exchange resins (RSPO, Diaion-CRP200, Diphonix, Purolite S940, Duolite ES467, and Lewatit OC 1060) and a solvent containing ion-exchange resins (Actinide-CU). The kinetic performance of ion-exchange resins was compared, and the effect of Fe(II) and Ca(II) ions on the sorption and elution performance has also been examined. The results showed that the resin Actinide-CU containing a diphosphonate extractant was very effective for removing uranium from phosphoric acid solution. However, the elution performance of this resin with both acid and carbonate eluants was poor. It is concluded that the chelating resins Diphonix, Duolite ES467, Lewatit OC 1060, and Purolite S940 give reasonable sorption of uranium in the presence of Fe(II) ions in batch sorption trials. The desorption of uranium has been performed quantitatively using carbonate eluants. Purolite S940 was used in smallscale column extractions of uranium from phosphoric acid solutions, and promising loading/ elution profiles were obtained.

Http Dx Doi Org 10 1081 Ss 100100817, Feb 15, 2007

ABSTRACT Column sorption–elution studies for boron removal were performed using N-glucamine-type ... more ABSTRACT Column sorption–elution studies for boron removal were performed using N-glucamine-type chelating ion-exchange resins Diaion CRB 02 Purolite S 108. The breakthrough curves were obtained as a function of resin type and feed flow rate. Boron was effectively removed from the wastewater of Kizildere, Turkey, geothermal power plant by passing it through the resins Diaion CRB 02 and Purolite S 108 at a space velocity of 25 bed volumes per hour. The boron on the resins was quantitatively eluted with 0.25 M H2SO4 solution. The resin Diaion CRB 02 was used to study the recycle use of resin for boron removal from the wastewater of Kizildere geothermal power plant. The capacity of Diaion CRB 02 remained constant after three sorption–elution–washing–regeneration cycles.

Reactive and Functional Polymers, 1998

Solvent-impregnated resins (SIR) containing Cyanex 302 (bis [2,4,4-trimethylpentyl] monothiophosp... more Solvent-impregnated resins (SIR) containing Cyanex 302 (bis [2,4,4-trimethylpentyl] monothiophosphinic acid) have been prepared using Amberlite XAD-2, XAD-4, XAD-7 and XAD-8 as polymeric support. These prepared SIR have been used for the extraction of Cd(II) and Cu(II) from phosphoric acid solutions. The effect of phosphoric acid concentration on Cd(II) uptake has been investigated by batch extraction method. Columnar extractions of Cd(II) and Cu(II) from 40% H PO have 3 4 been performed using XAD-7 resin impregnated with Cyanex 302. The resin exhibited similar column sorption behaviour for both Cd(II) and Cu(II). The elution of both Cd(II) and Cu(II) from SIR has been achieved with 4 M HCl solution. The elution of Cd(II) occurred sharply but with a long tail-off and furthermore the elution of Cu(II) was slow.

Separation Science and Technology, 1999

... KABAY b * , MUSTAFA DEMIRCIOGLU b , HASAN MORDOGAN c & UNER IPEKOGLU c pages 2553-256... more ... KABAY b * , MUSTAFA DEMIRCIOGLU b , HASAN MORDOGAN c & UNER IPEKOGLU c pages 2553-2569. ... The authors gratefully acknowledge the assistance of Mr. M. Akcay, Mr. ME Solak, Ms. S. Yayli, and Ms. N. Kocacik during the experimental work and calculations. ...

Separation and Purification Technology, 2012

ABSTRACT In this study, poly(vinylchloride) (PVC) based heterogenous strong acidic cation exchang... more ABSTRACT In this study, poly(vinylchloride) (PVC) based heterogenous strong acidic cation exchange membranes were prepared by the solution casting technique by using suspension polymerized polyvinylchloride (S-PVC) and emulsion polymerized polyvinylchloride (E-PVC) as binders, dioctyl phthalate (DOP) and ionic liquid (IL) tetradecyl(trihexyl)phosphoniumdecanoate as plasticizers and ion exchange resin as functional group agent. The main goal of this work was to evaluate the effects of polymer binder type, plasticizer type and bider/plasticizer ratio on pyhsicochemical, morphological and electrochemical properties of the prepared membranes. Physicochemical characterization consisted of water contents, dry and wet densities, porosities, ion exchange capacities of membranes and isotherm studies. Scanning Electron Microscopy (SEM) analysis was used to perform morphological characterization. Water contents of the membranes were found between 30% and 40% while density values were in the 0.7–1.2 g/cm3 range. Porosities were found between 0.2 and 0.4 and ion exchange capacities changed between 1.2 and 2.8 meq Na+/g-dry. Electrochemical characterization included transport numbers of membranes determined by the membrane potential method. Transport number for the membranes prepared with dioctyl phthalate (DOP) was found to be around 0.5 whereas this figure was 1.0 for the membranes prepared with IL. Diffusivity values of Na+ ions across the membrane were calculated by using the Donnan dialysis method and found in order of magnitude-5.

The Journal of Supercritical Fluids, 2012

ABSTRACT Supercritical CO2 extraction of phenolic compounds from Zostera marina residues was opti... more ABSTRACT Supercritical CO2 extraction of phenolic compounds from Zostera marina residues was optimized by developing a mathematical model based on mass transfer balances. A linear driving force model was applied considering model parameters such as solute concentration on the surface of the solid (Cs) and in the supercritical fluid phase (Cf), film mass transfer coefficient (kf) and molecular diffusivity (DAB) and axial dispersion (Dax) coefficients. Henry's law was used to describe the equilibrium state of solid and fluid phases. The results of the proposed model were compared to that of the experimental data in terms of transport properties and extraction yield at various temperatures (303.15, 323.15, 353.15 K), pressures (15, 25, 35 MPa) and co-solvent mass ratios (0, 10, 20%). The optimum parameters were elicited as 25 MPa, 353.15 K and a co-solvent ratio of 20% yielding 77.22 μg g−1 dry feed. The model satisfactorily described the extraction yield which can be used for scale-up purposes.

Industrial & Engineering Chemistry Research, 1998

... Kabay, N.; Demircioglu, M.; Ekinci, H.; Yuksel, M.; Saglam, M.; Streat, M. Extraction of cadm... more ... Kabay, N.; Demircioglu, M.; Ekinci, H.; Yuksel, M.; Saglam, M.; Streat, M. Extraction of cadmium from phosphoric acid solution by solvent ... Nalan Kabay, Mustafa Demircio lu, Saniye Yaylı, Emre Günay, Mithat Yüksel, Mehmet Sa lam, and Michael Streat. Industrial & Engineering ...

Desalination, 2002

The separation performances of divalent ions (Ca?+ and Mg*+) by electrodialysis (ED) were compare... more The separation performances of divalent ions (Ca?+ and Mg*+) by electrodialysis (ED) were compared using a constant voltage mode of operation. For the batch tests, TS-1-10 ED equipment was employed. During the experimental studies, the effects of electrical potential applied and flow rate of streams on the separation performance of each cation have been monitored by measuring the outlet concentrations of the dilute stream. The operation time was short when a high potential was applied. On the other hand, the effect of flow rate on separation performance was not so apparent. Specific power consumption increased with an increase in potential applied, although it was not sensitive to the change in flow rate.

Chemical Engineering Communications, 2003

... N. KABAY N. GIZLI M. DEMIRCIOG˘LU M.YUKSEL M. SAG˘LAM Ege University, Department of Chemical ... more ... N. KABAY N. GIZLI M. DEMIRCIOG˘LU M.YUKSEL M. SAG˘LAM Ege University, Department of Chemical Engineering, Bornova-˙Izmir,Turkey M. ARDA U.YUKSEL Ege University, Department of Chemistry, Bornova-˙lzmir,Turkey B. SAHA M. STREAT ...

Reactive & Functional Polymers, 1998

Solvent-impregnated resins (SIR) containing Cyanex 302 (bis [2,4,4-trimethylpentyl] monothiophosp... more Solvent-impregnated resins (SIR) containing Cyanex 302 (bis [2,4,4-trimethylpentyl] monothiophosphinic acid) have been prepared using Amberlite XAD-2, XAD-4, XAD-7 and XAD-8 as polymeric support. These prepared SIR have been used for the extraction of Cd(II) and Cu(II) from phosphoric acid solutions. The effect of phosphoric acid concentration on Cd(II) uptake has been investigated by batch extraction method. Columnar extractions of Cd(II)

Chemical Engineering Communications, 2003

The poly(styrene-co-divinylbenzene) beads were synthesized by suspension polymerization using ben... more The poly(styrene-co-divinylbenzene) beads were synthesized by suspension polymerization using benzoylperoxide as an initiator and i -octane as a diluent. The copolymer beads with a particle size range of 32-60 mesh were selected. Chloromethylation was performed with chloromethylether at 0°C using tetrachloroethane as swelling agent and AlCl 3 as catalyst. The phosphorylation of copolymer beads (RS) and its chloromethylated derivative (RCS)

Industrial & Engineering Chemistry Research, 1999

Desalination, 2003

The separation performance of K+ ions from KC1 solution has been investigated by electrodialysis ... more The separation performance of K+ ions from KC1 solution has been investigated by electrodialysis at constant voltage mode of operation as a fimction of flow rate and voltage scanned. TS-l-10 model electrodialysis equipment (Tokuyama) modified with rotameters was employed in experimental runs. The efficiencies of each unsteady state run were evaluated as specific power consumption with the electrical energy consumed only in stack. The separation performance of K' ions was compared with that of Na' ions.

Desalination, 2001

The separation performance of Na+ ions from NaCl solution has been investigated by electrodialysi... more The separation performance of Na+ ions from NaCl solution has been investigated by electrodialysis at constant voltage mode of operation. TS-1-10 electrodialysis equipment (Tokuyama) modified with rotameters was employed in experimental studies. During an unsteady-state run of the ED system, both inlet and outlet concentrations of both concentrate and dilute streams were measured at time intervals of 5 min until

Desalination, 2003

... Kabaya*, M. Arda b, I. Kurucaovalia, E. Ersoza, H. Kahvecia, M. Cana, S. Data,S. Kopuzlua, M.... more ... Kabaya*, M. Arda b, I. Kurucaovalia, E. Ersoza, H. Kahvecia, M. Cana, S. Data,S. Kopuzlua, M. Hanera, M. Demircioglua, M. Yuksela"Department f Chemical Engineering, Faculty of Engineering,Ege University, 35100 Iimir; TurkeyTel/Fax -90 (232J 3887600; e-mail: kabay@eng ...

Industrial & Engineering Chemistry Research, 1998

Experimental measurements have been made on the batch extraction of uranium from phosphoric acid ... more Experimental measurements have been made on the batch extraction of uranium from phosphoric acid solutions using various chelating ion-exchange resins (RSPO, Diaion-CRP200, Diphonix, Purolite S940, Duolite ES467, and Lewatit OC 1060) and a solvent containing ion-exchange resins (Actinide-CU). The kinetic performance of ion-exchange resins was compared, and the effect of Fe(II) and Ca(II) ions on the sorption and elution performance has also been examined. The results showed that the resin Actinide-CU containing a diphosphonate extractant was very effective for removing uranium from phosphoric acid solution. However, the elution performance of this resin with both acid and carbonate eluants was poor. It is concluded that the chelating resins Diphonix, Duolite ES467, Lewatit OC 1060, and Purolite S940 give reasonable sorption of uranium in the presence of Fe(II) ions in batch sorption trials. The desorption of uranium has been performed quantitatively using carbonate eluants. Purolite S940 was used in smallscale column extractions of uranium from phosphoric acid solutions, and promising loading/ elution profiles were obtained.

Http Dx Doi Org 10 1081 Ss 100100817, Feb 15, 2007

ABSTRACT Column sorption–elution studies for boron removal were performed using N-glucamine-type ... more ABSTRACT Column sorption–elution studies for boron removal were performed using N-glucamine-type chelating ion-exchange resins Diaion CRB 02 Purolite S 108. The breakthrough curves were obtained as a function of resin type and feed flow rate. Boron was effectively removed from the wastewater of Kizildere, Turkey, geothermal power plant by passing it through the resins Diaion CRB 02 and Purolite S 108 at a space velocity of 25 bed volumes per hour. The boron on the resins was quantitatively eluted with 0.25 M H2SO4 solution. The resin Diaion CRB 02 was used to study the recycle use of resin for boron removal from the wastewater of Kizildere geothermal power plant. The capacity of Diaion CRB 02 remained constant after three sorption–elution–washing–regeneration cycles.

Reactive and Functional Polymers, 1998

Solvent-impregnated resins (SIR) containing Cyanex 302 (bis [2,4,4-trimethylpentyl] monothiophosp... more Solvent-impregnated resins (SIR) containing Cyanex 302 (bis [2,4,4-trimethylpentyl] monothiophosphinic acid) have been prepared using Amberlite XAD-2, XAD-4, XAD-7 and XAD-8 as polymeric support. These prepared SIR have been used for the extraction of Cd(II) and Cu(II) from phosphoric acid solutions. The effect of phosphoric acid concentration on Cd(II) uptake has been investigated by batch extraction method. Columnar extractions of Cd(II) and Cu(II) from 40% H PO have 3 4 been performed using XAD-7 resin impregnated with Cyanex 302. The resin exhibited similar column sorption behaviour for both Cd(II) and Cu(II). The elution of both Cd(II) and Cu(II) from SIR has been achieved with 4 M HCl solution. The elution of Cd(II) occurred sharply but with a long tail-off and furthermore the elution of Cu(II) was slow.

Separation Science and Technology, 1999

... KABAY b * , MUSTAFA DEMIRCIOGLU b , HASAN MORDOGAN c & UNER IPEKOGLU c pages 2553-256... more ... KABAY b * , MUSTAFA DEMIRCIOGLU b , HASAN MORDOGAN c & UNER IPEKOGLU c pages 2553-2569. ... The authors gratefully acknowledge the assistance of Mr. M. Akcay, Mr. ME Solak, Ms. S. Yayli, and Ms. N. Kocacik during the experimental work and calculations. ...

Separation and Purification Technology, 2012

ABSTRACT In this study, poly(vinylchloride) (PVC) based heterogenous strong acidic cation exchang... more ABSTRACT In this study, poly(vinylchloride) (PVC) based heterogenous strong acidic cation exchange membranes were prepared by the solution casting technique by using suspension polymerized polyvinylchloride (S-PVC) and emulsion polymerized polyvinylchloride (E-PVC) as binders, dioctyl phthalate (DOP) and ionic liquid (IL) tetradecyl(trihexyl)phosphoniumdecanoate as plasticizers and ion exchange resin as functional group agent. The main goal of this work was to evaluate the effects of polymer binder type, plasticizer type and bider/plasticizer ratio on pyhsicochemical, morphological and electrochemical properties of the prepared membranes. Physicochemical characterization consisted of water contents, dry and wet densities, porosities, ion exchange capacities of membranes and isotherm studies. Scanning Electron Microscopy (SEM) analysis was used to perform morphological characterization. Water contents of the membranes were found between 30% and 40% while density values were in the 0.7–1.2 g/cm3 range. Porosities were found between 0.2 and 0.4 and ion exchange capacities changed between 1.2 and 2.8 meq Na+/g-dry. Electrochemical characterization included transport numbers of membranes determined by the membrane potential method. Transport number for the membranes prepared with dioctyl phthalate (DOP) was found to be around 0.5 whereas this figure was 1.0 for the membranes prepared with IL. Diffusivity values of Na+ ions across the membrane were calculated by using the Donnan dialysis method and found in order of magnitude-5.

The Journal of Supercritical Fluids, 2012

ABSTRACT Supercritical CO2 extraction of phenolic compounds from Zostera marina residues was opti... more ABSTRACT Supercritical CO2 extraction of phenolic compounds from Zostera marina residues was optimized by developing a mathematical model based on mass transfer balances. A linear driving force model was applied considering model parameters such as solute concentration on the surface of the solid (Cs) and in the supercritical fluid phase (Cf), film mass transfer coefficient (kf) and molecular diffusivity (DAB) and axial dispersion (Dax) coefficients. Henry's law was used to describe the equilibrium state of solid and fluid phases. The results of the proposed model were compared to that of the experimental data in terms of transport properties and extraction yield at various temperatures (303.15, 323.15, 353.15 K), pressures (15, 25, 35 MPa) and co-solvent mass ratios (0, 10, 20%). The optimum parameters were elicited as 25 MPa, 353.15 K and a co-solvent ratio of 20% yielding 77.22 μg g−1 dry feed. The model satisfactorily described the extraction yield which can be used for scale-up purposes.

Industrial & Engineering Chemistry Research, 1998

... Kabay, N.; Demircioglu, M.; Ekinci, H.; Yuksel, M.; Saglam, M.; Streat, M. Extraction of cadm... more ... Kabay, N.; Demircioglu, M.; Ekinci, H.; Yuksel, M.; Saglam, M.; Streat, M. Extraction of cadmium from phosphoric acid solution by solvent ... Nalan Kabay, Mustafa Demircio lu, Saniye Yaylı, Emre Günay, Mithat Yüksel, Mehmet Sa lam, and Michael Streat. Industrial & Engineering ...

Desalination, 2002

The separation performances of divalent ions (Ca?+ and Mg*+) by electrodialysis (ED) were compare... more The separation performances of divalent ions (Ca?+ and Mg*+) by electrodialysis (ED) were compared using a constant voltage mode of operation. For the batch tests, TS-1-10 ED equipment was employed. During the experimental studies, the effects of electrical potential applied and flow rate of streams on the separation performance of each cation have been monitored by measuring the outlet concentrations of the dilute stream. The operation time was short when a high potential was applied. On the other hand, the effect of flow rate on separation performance was not so apparent. Specific power consumption increased with an increase in potential applied, although it was not sensitive to the change in flow rate.

Chemical Engineering Communications, 2003

... N. KABAY N. GIZLI M. DEMIRCIOG˘LU M.YUKSEL M. SAG˘LAM Ege University, Department of Chemical ... more ... N. KABAY N. GIZLI M. DEMIRCIOG˘LU M.YUKSEL M. SAG˘LAM Ege University, Department of Chemical Engineering, Bornova-˙Izmir,Turkey M. ARDA U.YUKSEL Ege University, Department of Chemistry, Bornova-˙lzmir,Turkey B. SAHA M. STREAT ...

Reactive & Functional Polymers, 1998

Solvent-impregnated resins (SIR) containing Cyanex 302 (bis [2,4,4-trimethylpentyl] monothiophosp... more Solvent-impregnated resins (SIR) containing Cyanex 302 (bis [2,4,4-trimethylpentyl] monothiophosphinic acid) have been prepared using Amberlite XAD-2, XAD-4, XAD-7 and XAD-8 as polymeric support. These prepared SIR have been used for the extraction of Cd(II) and Cu(II) from phosphoric acid solutions. The effect of phosphoric acid concentration on Cd(II) uptake has been investigated by batch extraction method. Columnar extractions of Cd(II)

Chemical Engineering Communications, 2003

The poly(styrene-co-divinylbenzene) beads were synthesized by suspension polymerization using ben... more The poly(styrene-co-divinylbenzene) beads were synthesized by suspension polymerization using benzoylperoxide as an initiator and i -octane as a diluent. The copolymer beads with a particle size range of 32-60 mesh were selected. Chloromethylation was performed with chloromethylether at 0°C using tetrachloroethane as swelling agent and AlCl 3 as catalyst. The phosphorylation of copolymer beads (RS) and its chloromethylated derivative (RCS)