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  1. Article ; Online: Nieuwe baanbrekende technologieën in afvalwaterzuivering

    Kuipers, N.J.M.

    Waterforum

    Column

    2023  Volume 19, Issue 6

    Keywords Life Science
    Language English
    Publishing country nl
    Document type Article ; Online
    ISSN 1877-7562
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Online: SeaHydrogen

    Kuipers, N.J.M. / van Medevoort, J.

    Position paper: integral Nexus approach for the production of hydrogen at sea

    2023  

    Keywords Life Science
    Language English
    Publisher Wageningen Food & Biobased Research
    Publishing country nl
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Selective adsorption in ion exchange membranes: The effect of solution ion composition on ion partitioning.

    Ozkul, S / Arbabzadeh, O / Bisselink, R J M / Kuipers, N J M / Bruning, H / Rijnaarts, H H M / Dykstra, J E

    Water research

    2024  Volume 254, Page(s) 121382

    Abstract: Electrodialysis is a water desalination technology that enables selective separation of ions, making it a promising solution for sustainable water reuse. The selectivity of the process is mainly determined by the properties of ion exchange membranes that ...

    Abstract Electrodialysis is a water desalination technology that enables selective separation of ions, making it a promising solution for sustainable water reuse. The selectivity of the process is mainly determined by the properties of ion exchange membranes that can vary depending on the composition of ions in water, such as water uptake and charge density. In this work, we studied selective adsorption of Na
    MeSH term(s) Ion Exchange ; Adsorption ; Ions ; Water ; Sodium
    Chemical Substances Ions ; Water (059QF0KO0R) ; Sodium (9NEZ333N27)
    Language English
    Publishing date 2024-02-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 202613-2
    ISSN 1879-2448 ; 0043-1354
    ISSN (online) 1879-2448
    ISSN 0043-1354
    DOI 10.1016/j.watres.2024.121382
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Selective adsorption in ion exchange membranes

    Ozkul, S. / Arbabzadeh, O. / Bisselink, R.J.M. / Kuipers, N.J.M. / Bruning, H. / Rijnaarts, H.H.M. / Dykstra, J.E.

    Water Research

    The effect of solution ion composition on ion partitioning

    2024  Volume 254

    Abstract: Electrodialysis is a water desalination technology that enables selective separation of ions, making it a promising solution for sustainable water reuse. The selectivity of the process is mainly determined by the properties of ion exchange membranes that ...

    Abstract Electrodialysis is a water desalination technology that enables selective separation of ions, making it a promising solution for sustainable water reuse. The selectivity of the process is mainly determined by the properties of ion exchange membranes that can vary depending on the composition of ions in water, such as water uptake and charge density. In this work, we studied selective adsorption of Na+ and K+ ions in various ion exchange membranes considering the effect of solution ion composition on membrane water volume fraction. For that purpose, we conducted membrane adsorption experiments using solutions with Na+ and K+ ions with different ion compositions including Li+, Ca2+ or Mg2+ ions at different concentrations (0.001 – 0.25 M). The experiments showed that with the total ion concentration and the amount of divalent ions in solution, the membrane water volume fraction decreases while the selective adsorption of the smaller (hydrated) K+ ions over the Na+ ions in the membrane increases. We developed a theoretical framework based on Boublik-Mansoori-Carnahan-Starling-Leland (BMCSL) theory to describe the effect of membrane water volume fraction on selective adsorption of the ions by including volumetric effects, such as size exclusion. The developed framework was used to describe ion partitioning results of the membrane adsorption experiments. In addition, the effect of solution ion composition on selective ion removal during electrodialysis operation was evaluated using experimental data and theoretical calculations. The results of this study show that considering volumetric effects can improve the ion partitioning description in ion exchange membranes for solutions with various ion compositions.
    Keywords BMCSL theory ; Electrodialysis ; Ion partitioning ; Membrane selectivity ; Selective adsorption ; Size exclusion
    Subject code 540
    Language English
    Publishing country nl
    Document type Article ; Online
    ZDB-ID 202613-2
    ISSN 1879-2448 ; 0043-1354
    ISSN (online) 1879-2448
    ISSN 0043-1354
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    In stock of ZB MED Bonn / Germany

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  5. Article ; Conference proceedings ; Online: Improving the electrochemical production of hydrogen peroxide

    Bisselink, R.J.M. / Zijlstra, Martin / Goetheer, E. / Kuipers, N.J.M.

    2019  

    Keywords Life Science
    Language English
    Publishing country nl
    Document type Article ; Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Conference proceedings ; Online: Modelling Ion Transfer Through Ion Exchange Membranes In Electrodialysis For Multi-Ionic Solutions.

    Özkul, S. / Daal, J.J., van / Bisselink, R.J.M. / Kuipers, N.J.M. / Bruning, H. / Dykstra, J.E. / Rijnaarts, H.H.M.

    2020  

    Abstract: Poster and abstract: Water reuse is one of the solutions to prevent depletion of freshwater resources. However, continuous use of water in closed cycle systems can result in accumulation of specific ions in the water cycle, which limits the possibilities ...

    Abstract Poster and abstract: Water reuse is one of the solutions to prevent depletion of freshwater resources. However, continuous use of water in closed cycle systems can result in accumulation of specific ions in the water cycle, which limits the possibilities for re-use applications. Especially in agriculture, accumulation of sodium ion (Na+) in the irrigation water negatively affects the soil permeability and limits the crop growth. Developing ion selective desalination technologies that remove specific ions could in many cases increase the potential for water reuse. Electrodialysis (ED) is a desalination technology that has been mainly used for brackish water desalination and reuse. ED has a potential to selectively remove or recover specific ions. It is an electrically driven membrane process in which ion transport takes place as a result of electro-migration and diffusion across the membranes. Understanding these mechanisms behind ion transport mechanisms in ED is important to enhance the ion selectivity of the process. In this research we aim to explain these mechanisms based on theoretical and experimental studies considering multi-ionic solutions. For that purpose, a two-dimensional theoretical model was developed in order to describe the transport of ions and water through membranes in an ED cell. The computational domain of this model is a repeating unit of an ED cell, which includes one diluate channel, one cation exchange membrane (CEM), one concentrate channel and one anion exchange membrane (AEM). The two-dimensional process model describes transport of ions across the membranes with the extended Nernst-Planck equation. Furthermore, chemical (acid-base) equilibria were included. Different material characteristics of the membranes (AEM and CEM) used in the ED cell, such as thickness, membrane charge and porosity were also considered in the model. Furthermore, ion specific properties, including the chemical affinity of the membrane materials for specific ions, and the diffusion coefficients were analysed and included in the model. In order to validate the model desalination experiments were performed using a laboratory scale batch-mode ED setup. The effect of various operational parameters on selectivity was studied, such as the current density and the water flowrate. During the experiments the pH, electrical conductivity, temperature and water level of the three solutions (diluate, concentrate and electrolyte) were recorded continuously.
    Keywords WIMEK ; Sectie Milieutechnologie ; Sub-department of Environmental Technology ; Milieutechnologie ; Environmental Technology ; VLAG ; Biobased Chemistry and Technology ; FBR Sustainable Chemistry & Technology ; BBP Sustainable Chemistry & Technology ; FBR Bioconversion ; BBP Bioconversion
    Subject code 660 ; 540
    Language English
    Publisher Czech Membrane Platform
    Publishing country nl
    Document type Article ; Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Conference proceedings ; Online: Modelling ion transfer through ion exchange membranes in electrodialysis for multi-ionic solutions.

    Özkul, S. / van Daal, J.J. / Bisselink, R.J.M. / Kuipers, N.J.M. / Bruning, H. / Dykstra, J.E. / Rijnaarts, H.H.M.

    2020  

    Abstract: Poster and abstract:Water reuse is one of the solutions to prevent depletion of freshwater resources. However, continuous use of water in closed-cycle systems can result in accumulation of specific ions, which limits the possibilities for re-use ... ...

    Abstract Poster and abstract:Water reuse is one of the solutions to prevent depletion of freshwater resources. However, continuous use of water in closed-cycle systems can result in accumulation of specific ions, which limits the possibilities for re-use applications. Developing ion-selective desalination technologies could in many cases increase the potential for water reuse. Electrodialysis (ED) is a desalination technology that has a potential to selectively remove specific ions. ED is an electrically driven membrane process in which ion transport takes place as a result of electro-migration and diffusion across the membranes. Understanding these mechanisms is important to enhance the ion selectivity of the process. In this research we aim to explain these mechanisms based on theoretical and experimental studies considering multi-ionic solutions. For that purpose, a two-dimensional theoretical model was developed in order to describe the transport of ions and water through membranes in an ED cell. The computational domain of this model is a repeating unit of an ED cell, which includes one diluate channel, one cation exchange membrane (CEM), one concentrate channel and one anion exchange membrane (AEM). The two-dimensional process model describes transport of ions across the membranes with the extended Nernst-Planck equation. Furthermore, chemical (acid-base) equilibria were included. Different material characteristics of the membranes used in the ED cell, such as thickness, membrane charge and porosity were also considered in the model. Furthermore, ion specific properties, including the chemical affinity of the membrane materials for specific ions, and the diffusion coefficients were analysed and included in the model. In order to validate the model desalination experiments were performed using a laboratory-scale batch-mode ED setup. The effect of various operational parameters on selectivity was studied, such as the current density and the water flowrate. During the experiments, the pH, electrical conductivity, ...
    Keywords Life Science
    Subject code 660
    Language English
    Publishing country nl
    Document type Article ; Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Membrane distillation against a pressure difference

    Keulen, L. / van der Ham, L.V. / Kuipers, N.J.M. / Hanemaaijer, J.H. / Vlugt, T.J.H. / Kjelstrup, S.

    Journal of Membrane Science

    2017  Volume 524

    Abstract: Membrane distillation is an attractive technology for production of fresh water from seawater. The MemPower® concept, studied in this work, uses available heat (86 °C) to produce pressurized water (2.2 bar and 46 °C) by membrane distillation, which again ...

    Abstract Membrane distillation is an attractive technology for production of fresh water from seawater. The MemPower® concept, studied in this work, uses available heat (86 °C) to produce pressurized water (2.2 bar and 46 °C) by membrane distillation, which again can be used to power a turbine for co-production of electricity. We develop a non-equilibrium thermodynamic model to accurately describe the transfer at the liquid-membrane interfaces, as well as through the hydrophobic membrane. The model can explain the observed mass flux, and shows that 85% of the energy is dissipated at the membrane-permeate interface. It appears that the system's performance will benefit from a lower interface resistance to heat transfer, in particular at the permeate side of the membrane. The nature of the membrane polymer and the pore diameter may play a role in this context.
    Keywords Heat and mass transfer ; Irreversible thermodynamics ; MemPower ; Membrane distillation ; Water desalination
    Subject code 660
    Language English
    Publishing country nl
    Document type Article ; Online
    ZDB-ID 194516-6
    ISSN 0376-7388
    ISSN 0376-7388
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3272: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  9. Article: A consolidation based extruder model to explore GAME process configurations

    Willems, P / Kuipers, N.J.M / de Haan, A.B

    Journal of food engineering. 2009 Jan., v. 90, no. 2

    2009  

    Abstract: A mathematical model from literature was adapted to predict the pressure profile and oil yield for canola in a lab-scale extruder. Changing the description of the expression process from filtration to consolidation significantly improved the performance ... ...

    Abstract A mathematical model from literature was adapted to predict the pressure profile and oil yield for canola in a lab-scale extruder. Changing the description of the expression process from filtration to consolidation significantly improved the performance and physical meaning of the model. The model predicts the trends in pressure and residual oil content with varying screw rotational speed and choke opening very well, but the residual oils content is always overestimated. The model was unable to describe the influence of temperature on pressure and residual oil content. With the developed model, four extruder designs were compared based on the resulting residual oil contents at the same process conditions. Conventional extrusion followed by a gas assisted mechanical extraction stage was found to result in the lowest residual oil content (14.5wt%) compared to single-stage conventional residual oil content of 19wt%.
    Keywords extrusion ; model food systems ; mathematical models ; canola oil ; lipid content ; pressing ; extraction ; food processing quality ; pressure
    Language English
    Dates of publication 2009-01
    Size p. 238-245.
    Publishing place [New York, NY]: Elsevier Science Pub. Co.
    Document type Article
    ZDB-ID 622518-4
    ISSN 0260-8774
    ISSN 0260-8774
    DOI 10.1016/j.jfoodeng.2008.06.027
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

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  10. Article: Hydraulic pressing of oilseeds: Experimental determination and modeling of yield and pressing rates

    Willems, P / Kuipers, N.J.M / De Haan, A.B

    Journal of food engineering. 2008 Nov., v. 89, no. 1

    2008  

    Abstract: The influence of pressure, temperature and moisture content on the oil yield and rate of conventional hydraulic expression of sesame and linseed is discussed as well as the influence of pressure and temperature for rapeseed, palm kernel, jatropha and ... ...

    Abstract The influence of pressure, temperature and moisture content on the oil yield and rate of conventional hydraulic expression of sesame and linseed is discussed as well as the influence of pressure and temperature for rapeseed, palm kernel, jatropha and dehulled jatropha. Yield increased with increase in pressure and with increase in temperature. For both sesame and linseed maximum oil yield was obtained at a moisture content of about 4wt%. Maximum yields obtained were 45-55wt% (oil/oil) for hulled seeds (linseed, rapeseed, palm kernel and jatropha) and 70-75wt% (oil/oil) for dehulled seeds (sesame and dehulled jatropha). Rate of expression increased with an increase in temperature and a decrease in moisture content. Furthermore, the rate of pressing was described by the Shirato model. The increased creep, and thus decreased rate of pressing, observed with increased moisture content was satisfactorily described by the Shirato model.
    Keywords water content ; oilseeds ; rapeseed ; palm kernels ; Jatropha ; hulling ; pressing ; temperature ; water activity ; extraction ; sesame seed ; sesame oil ; rapeseed oil ; palm kernel oil ; mathematical models
    Language English
    Dates of publication 2008-11
    Size p. 8-16.
    Publishing place [New York, NY]: Elsevier Science Pub. Co.
    Document type Article
    ZDB-ID 622518-4
    ISSN 0260-8774
    ISSN 0260-8774
    DOI 10.1016/j.jfoodeng.2008.03.023
    Database NAL-Catalogue (AGRICOLA)

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