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  • 1990-1994  (3)
  • 1980-1984  (2)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Graphite felt as an electrode for thin-layer electrochemistry (1990)
    Springer
    Journal of applied electrochemistry 20 (1990), S. 877-879 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01094321
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Water desalting by means of electrochemical parametric pumping (1983)
    Springer
    Journal of applied electrochemistry 13 (1983), S. 473-487 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract It was shown previously that adsorption of ions at the electrical double layer of a high specific surface area carbon electrode can serve for water desalination. This is effected by assembling two such electrodes in a cell, cycling electronic charge between them and applying periodic synchronous pumping of the liquid through the cell. This process has been termed Electrochemical Parametric Pumping (ECPP). In the present article, modified charge coordinates, desalting efficiencies, isopotentiograms (analogous to adsorption isotherms) and optimization considerations of the two adsorptive electrode batch unit of the ECPP were derived and analysed on the basis of the propterties of each single electrode separately.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617522
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Water desalting by means of electrochemical parametric pumping. II. Separation properties of a multistage column (1983)
    Springer
    Journal of applied electrochemistry 13 (1983), S. 489-505 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Multistage electrochemical parametric pumping has been successfully carried out for water desalination. Separation was effected by electroadsorption-desorption cycles of the ions into and from the electrical double layer of high surface carbon electrodes. At steady state and total reflux, the concentration ratio between the upper and lower heads of the electrochemical column was as high as 150. Two models for the build up of the concentration profile within the column are presented. The first is based on a solution of the two-phase mass transport equation using the proper boundary and initial conditions. The second treatment is based on the mixed cells assumptions. In both treatments, interphase equilibrium is assumed using the isopotentiograms as the specific equilibrium curves. Use is also made of a fast computer for the simulation of the electrochemical paramatric pumping cycles. The two models are in good agreement with the experimental results particularly in the cases where the initial concentration is high and interphase equilibrium is maintained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617523
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Mass transfer in an electrochemical reactor with two interacting jets (1992)
    Springer
    Journal of applied electrochemistry 22 (1992), S. 950-958 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract An electrochemical reactor operated with two identical solution streams injected in opposite directions on the same axis, and leaving it at a normal direction was studied by measuring local and global mass transfer coefficients and visualization of solution flow patterns. This flow configuration was compared to a case where a single stream enters the reactor and leaves it on the same axis. It was found that only the data obtained for the single stream mode can be correlated by the Chilton-Colburn relation, indicating a near laminar boundary layer flow. Global mass transfer coefficients for the single stream mode were found to be slightly higher than those for the interacting jets mode. However, when comparing the two modes by taking into account the dimensionless ratio of the mass transfer coefficient (Sh) to the energy consumption (Eu), it was found that the interacting jets (IJ) mode exhibits a better performance as compared to the single stream mode. The superiority of the IJ mode increases with increasing Reynold's number (Re).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01024143
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Removal of chromium from aqueous solutions by treatment with fibrous carbon electrodes: column effects (1991)
    Springer
    Journal of applied electrochemistry 21 (1991), S. 734-739 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The continuous removal of toxichexavalent chromium from contaminated solutions by means of a graphite felt based electrochemical column was studied. The process is based on anin situ generation of appropriate pH gradients which allows both rapid reduction to Cr3+ and its precipitation within the electrode bed. Conditions for the attainment of low (〈25 p.p.b.) effluent concentrations as well as longitudinal concentration distribution of the precipitate and maximum loading capacities are presented. Treatment schemes involving two separate columns or a dual function column are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01034054
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    Paper (German National Licenses)
    Fulltext
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